László Kovács

 

Main publications

 

 

1.           L. Kocsor, L. Péter, G. Corradi, Z. Kis, J. Gubicza, and L. Kovács: Mechanochemical Reactions of Lithium Niobate Induced by High-Energy Ball-Milling

Crystals 9 (2019) 334/1-14

 

2.           L. Kovács, L. Kocsor, É. Tichy-Rács, K. Lengyel, L. Bencs and G. Corradi: Hydroxyl ions probing transition metal dopants occupying Nb sites in stoichiometric LiNbO3

Optical Materials Express 9(12) (2019) 4506-4516

 

3.           P. Reichenbach, T. Kämpfe, A. Haußmann, A. Thiessen, T. Woike, R. Steudtner, L. Kocsor, Zs. Szaller, L. Kovács, L. Eng: Polaron-Mediated Luminescence in Lithium Niobate and Lithium Tantalate and Its Domain Contrast

Crystals 8 (2018) 214/1-48

 

4.           C. Mackeen, F. Bridges, L. Kovács, and J. Castillo-Torres: Substitution of Er, In, and Hf in LiNbO3: Evidence for multiple defect distributions about dopant sites

Physical Review Materials 2 (2018) 093602 1-11

 

5.           A. Buzády, M. Unferdorben, Gy. Tóth, J. Hebling, I. Hajdara, L. Kovács, L. Pálfalvi: Refractive index and absorption coefficient of undoped and Mg-doped lithium tantalate in the terahertz range

Journal of Infrared, Millimeter, and Terahertz Waves 38 (2017) 963-971

 

6.           L. Kovács, S. Arceiz Casas, G. Corradi, É. Tichy-Rács, L. Kocsor, K. Lengyel, W. Ryba-Romanowski, A. Strzep, A. Scholle, S. Greulich-Weber: Optical and EPR spectroscopy of Er3+ in lithium yttrium borate, Li6Y(BO3)3:Er single crystals

Optical Materials 72 (2017) 270-275

 

7.           L. Kovács, L. Kocsor, Zs. Szaller, I. Hajdara, G. Dravecz, K. Lengyel, G. Corradi: Lattice site of rare-earth ions in stoichiometric lithium niobate probed by OH– vibrational spectroscopy

Crystals 7 (2017) 230/1-9

 

8.           F. Bridges, C. Mackeen, L. Kovács: No difference in local structure about a Zn dopant for congruent and stoichiometric LiNbO3

Physical Review B 94 (2016) 014101 1-5

 

9.           N. Laczai, L. Kovács, Á. Péter, L. Bencs: Solid sampling determination of lithium and sodium additives in microsamples of yttrium oxyorthosilicate by high-resolution continuum source graphite furnace atomic absorption spectrometry

Spectrochimica Acta Part B 117 (2016) 8-15

 

10.        K. Lengyel, E. Beregi, I. Földvári, G. Corradi, L. Kovács, P. Solarz, W. Ryba-Romanowski: Effect of symmetry on the electronic transition in polytypic GdAl3(BO3)4:Eu:Tb crystals

Optical Materials 53 (2016) 30-33

 

11.        G. Mandula, Zs. Kis, L Kovács, Zs Szaller, A Krampf: Site selective measurement of relaxation properties at 980 nm in Er3+ doped congruent and stoichiometric lithium niobate crystals

Applied Physics B 122:72 (2016)

 

12.        M. Unferdorben, A. Buzády, J. Hebling, K. Kiss, I. Hajdara, L. Kovács, Á. Péter, L. Pálfalvi: Index of refraction and absorption coefficient spectra of paratellurite in the terahertz region

Journal of Infrared, Millimeter, and Terahertz Waves 37 (2016) 703-709

 

13.        N. Laczai, Á. Péter, L. Kovács, L. Bencs, E. Lőrincz: Synthesis and characterization of Y2(SiO4)O:Ce with LiF and NaF additives

Solid State Sciences 45 (2015) 23-29

 

14.        K. Lengyel, Á. Péter, L. Kovács, G. Corradi, L. Pálfalvi, J. Hebling, M. Unferdorben, G. Dravecz, I. Hajdara, Zs. Szaller, K. Polgár: Growth, defect structure and THz application of stoichiometric lithium niobate

Applied Physics Reviews 2 (2015) 040601-1-28

 

15.        L. Kovács, Zs. Szaller, K. Lengyel, G. Corradi: Hydroxyl ions in stoichiometric LiNbO3 crystals doped with optical damage resistant ions

Optical Materials 37 (2014) 55-58

 

16.        Zs. Kis, G. Mandula, K. Lengyel, I. Hajdara, L. Kovacs, M. Imlau: Homogeneous linewidth measurements of Yb3+ ions in congruent and stoichiometric lithium niobate crystals

Optical Materials 37 (2014) 845-853

 

17.        K. Lengyel, I. Kiss, L. Kovács, V. Szalay, G. Corradi: Anomalous temperature dependence of the OH- absorption band in stoichiometric LiNbO3 crystals

Vibrational Spectroscopy 71 (2014) 37-40

 

18.        É. Tichy-Rács, Á. Péter, V. Horváth, K. Polgár, K. Lengyel, L. Kovács: Preparation and study of Li6Y(BO3)3 and Li6Gd(BO3)3 double borates

Materials Science Forum 729 (2013) 493-496

 

19.        Á. Péter, I. Hajdara, Zs. Szaller, K. Lengyel, L. Kovács: The role of alkali additives in the crystallization of ferroelectric potassium lithium niobate crystals

Journal of Crystal Growth 371 (2013) 102-106

 

20.        L. Kovács, Zs. Szaller, K. Lengyel, Á. Péter, I. Hajdara, G. Mandula, L. Pálfalvi, J. Hebling: Photorefractive damage resistance threshold in stoichiometric LiNbO3:Zr crystals

Optics Letters 38 (2013) 2861-2864

 

21.        I. Hajdara, K. Lengyel, L. Kovács, Á. Péter and Zs. Szaller: Effect of alkali doping on the Raman spectra of potassium lithium niobate crystals

Ferroelectrics 428 (2012) 57-63

 

22.        L. Kovács, K. Lengyel and M. Gospodinov: Optical spectroscopy of multiferroic rare-earth manganites

Ferroelectrics 428 (2012) 82-86

 

23.        L. Bencs, K. György, M. Kardos, J. Osán, B. Alföldy, I. Varga, Zs. Ajtony, N. Szoboszlai, Zs. Stefánka, É. Széles, L. Kovács: Determination of trace elements in lithium niobate crystals by solid sampling and solution-based spectrometry methods

Analytica Chimica Acta 726 (2012) 1-8

 

24.        L. Kovács, K. Lengyel and M. Gospodinov: Antiferromagnetic ordering in RMnO3 rare-earth manganites observed by optical spectroscopy

Materials Research Bulletin 46 (2011) 2567-2569

 

25.        László Kovács, Krisztián Lengyel, and Viktor Szalay: Combination transitions due to stretching and librations of OH- ions in LiNbO3

Optics Letters 36 (2011) 3714-3716

 

26.        Viktor Szalay, Krisztián Lengyel, László Kovács, Vicente Timón and Alfonso Hernández-Laguna: Vibrations of H+(D+) in stoichiometric LiNbO3 single crystal

Journal of Chemical Physics 135 (2011) 124501/1-19

 

27.        K. Lengyel, L. Kovács, Á. Péter, K. Polgár, G. Corradi, A. Baraldi, R. Capelletti: Thermal kinetics of OH− ions in LiNbO3 :Mg crystals above the photorefractive threshold

Applied Physics Letters  96 (2010) 191907

 

28.        K. Lengyel, V. Timon, A. Hernandez-Laguna, V. Szalay, L. Kovács: Structure of OH− defects in LiNbO3

IOP Conference Series: Materials Science and Engineering 15 (2010) 012015/1-5

 

29.        G. Mandula, Z. Kis, P. Sinkovicz, L. Kovács: Homogeneous linewidth of the 4I11/2–4I15/2 optical transition of erbium in LiNbO3:Er3+

IOP Conference Series: Materials Science and Engineering 15 (2010) 012062/1-8

 

30.        L. Kovács, M. Mazzera, E. Beregi, R. Capelletti: Infrared absorption spectra of pure and doped YAl3(BO3)4 single crystals

Applied Physics B 94 (2009) 273-277

 

31.        L. Kovács, R. Capelletti, M. Gospodinov: Vibrational frequencies of the impurity-centred oxygen tetrahedra in sillenites

Vibrational Spectroscopy 46 (2008) 69-75

 

32.        Á. Péter, I. Hajdara, K. Lengyel, G. Dravecz, L. Kovács, M. Tóth: Characterization of Potassium Lithium Niobate (KLN) Ceramic System

Journal of Alloys and Compounds 463 (2008) 398-402

 

33.        K. Lengyel, Zs. Szaller, Á. Péter, K. Polgár, L. Kovács: Microscopic and Raman spectroscopic investigation of the domain structures in LiNbO3:Y:Mg 

Ferroelectrics 368 (2008) 3-11

 

34.        I. Hajdara, K. Lengyel, L. Kovács, Á. Péter, G. Dravecz, Zs. Szaller: Compositional dependence and structure of hydroxyl ion defects in ferroelectric potassium lithium niobate

Ferroelectrics 369 (2008) 98-107

 

35.        G. Dravecz, L. Kovács: Determination of the crystal composition from the OH- vibrational spectrum in lithium niobate

Applied Physics B 88 (2007) 305-307

 

36.        R. M. Araujo, K. Lengyel, R. A. Jackson, L. Kovács, M. E. G. Valerio: A computational study of intrinsic and extrinsic defects in LiNbO3

Journal of Physics: Condensed Matter 19 (2007) 046211

 

37.        K. Lengyel, L. Kovács, Á. Péter, K. Polgár, G. Corradi, P. Bourson: The effect of Mg doping on the Raman spectra of LiNbO3 crystals

physica status solidi (c) 4 (2007) 847-850

 

38.        L. Kovács, Á. Péter, L. I. Ivleva, A. Baraldi, R. Capelletti: Hydroxil ions in scheelite type molybdates and tungstates

physica status solidi (c) 4 (2007) 856-859

 

39.        R. M. Araujo, K. Lengyel, R. A. Jackson, M. E. G. Valerio, L. Kovács: Computer modelling of intrinsic and substitutional defects in LiNbO3

physica status solidi (c) 4 (2007) 1201-1204

 

40.        G. Dravecz, L. Kovács, Á. Péter, K. Polgár, P. Bourson: Raman and IR spectroscopic characterization of LiNbO3 crystals, grown from alkali metal oxide solvents

physica status solidi (c) 4, (2007) 1313-1316

 

41.        I. Hajdara, K. Lengyel, G. Dravecz, L. Kovács, Á. Péter, Zs. Szaller: Spectroscopic methods for the determination of the composition of potassium lithium niobate crystals

physica status solidi (c) 4 (2007) 1321-1324

 

42.        K. Lengyel, L. Kovács, Á. Péter, K. Polgár, G. Corradi: The effect of stoichiometry and Mg doping on the Raman spectra of LiNbO3:Mg crystals

Applied Physics B 87 (2007) 317-322

 

43.        G. Dravecz, Á. Péter, K. Polgár, L. Kovács: Alkali metal oxide solvents in the growth of stoichiometric LiNbO3 single crystal

Journal of Crystal Growth 286 (2006) 334-337

 

44.        M. A. Ellabban, M. Fally, R. A. Rupp, L. Kovács: Light-induced phase and amplitude gratings in centrosymmetric Gadolinium Gallium garnet doped with Calcium

Optics Express 14 (2006) 593-602

 

45.        V. Marinova, B. Mihailova, T. Malcherek, C. Paulmann, K. Lengyel, L. Kovács, M. Veleva, M. Gospodinov, B. Güttler, R. Stosch, U. Bismayer: Structural, optical and dielectric properties of relaxor-ferroelectric Pb0.78Ba0.22Sc0.5Ta0.5O3

Journal of Physics: Condensed Matter 18 (2006) L385-L393

 

46.        H. Dachraoui, R. A. Rupp, K. Lengyel, M. A. Ellabban, M. Fally, G. Corradi, L. Kovács, L. Ackermann: Photochromism of doubly doped terbium gallium garnet

Physical Review B 74 (2006) 144104 1-11

 

47.        K. Lengyel, Á. Péter, K. Polgár, L. Kovács, G. Corradi: UV and IR absorption studies in LiNbO3:Mg crystals below and above the photorefractive threshold

physica status solidi (c) 2 (2005) 171-174

 

48.        L. Kovács, Á. Péter, M. Gospodinov, R. Capelletti: Hydroxyl ions in acousto-optic Pb5(GeO4)(VO4)2 and Bi2(MoO4)3 single crystals

physica status solidi (c) 2 (2005) 689-692

 

49.        L. Kovács, M. T. Borowiec, A. Majchrowski, A. Baraldi, R. Capelletti: FTIR absorption study of hydroxyl ions in KHo(WO4)2 single crystals

Crystal Research and Technology 40 (2005) 444-448

 

50.        G. Mandula, R. A. Rupp, M. Balaskó, L. Kovács: Decay of photorefractive gratings in LiNbO3:Fe by neutron irradiation

Applied Physics Letters 86 (2005) 141107-1-3

 

51.        Á. Péter, K. Polgár, L. Kovács, K. Lengyel: Threshold concentration of MgO in near-stoichiometric LiNbO3 crystals

Journal of Crystal Growth 284 (2005) 149-155

52.        S. Bugaychuk, G. Mandula, L. Kovács, R.A. Rupp: Optical topographic technique to material characterization of photorefractive crystals

Proceedings of SPIE 6023 (2005) 143-153

 

53.        C. Bäuemer, C. David, K. Betzler, H. Hesse, K. Lengyel, L. Kovács and M. Wöhlecke:   Composition Dependence of the OH-Stretch-Mode Spectrum in Lithium Tantalate

physica status solidi (a) 201 (2004) R13-R16

 

54.        G. Corradi, M. Meyer, L. Kovács and K. Polgár: Gap Levels of Ti3+ on Nb or Li Sites in LiNbO3:(Mg):Ti Single Crystals and their Effect on Charge Transfer Processes

Applied Physics B 78 (2004) 607-614

 

55.        C. David, A. Tunyagi, M. Ulex, M. Wöhlecke, K. Betzler, K. Lengyel and L. Kovács: Structure of the OH– stretching vibrational band in SrxBa1-xNb2O6

Journal of Applied Physics 95 (2004) 5522-5526

 

56.        G. Dominiak-Dzik, W. Ryba-Romanowski, L. Kovács, E. Beregi: Effect of temperature on luminescence and VUV to visible conversion in the YAl3(BO3)4:Dy3+  (YAB:Dy) crystal

Radiation Measurements 38 (2004) 557-561

 

57.        S. Bugaychuk, L. Kovács, G. Mandula, K. Polgár, R. Rupp: Wave-mixing solitons in bulk photorefractive crystals

Proceedings of SPIE 5257 (2003) 201-205

 

58.        L. Kovács, K. Lengyel, A. Baraldi, R. Capelletti, M. Berkowski, W. Ryba-Romanowski: Hydroxyl ion absorption in LaGaO3 single crystals

Journal of Physics and Chemistry of Solids 64 (2003) 741-747

 

59.        E. Hartmann, Á. Péter, K. Lengyel, L. Kovács: Effect of melt composition on the electrical conductivity and IR absorption of CsLiB6O10 crystals

Crystal Research and Technology 38 (2003) 331-335

 

60.        S. Bugaychuk, L. Kovács, G. Mandula, K. Polgár, R. A. Rupp: Nonuniform dynamic gratings in photorefractive media with nonlocal response

Physical Review E 67 (2003) 046603-1-8

 

61.        K. Lengyel, L. Kovács, A. Baraldi, R. Capelletti, M. Berkowski, W. Ryba-Romanowski: The stretching vibration of hydroxyl ions in LaGaO3

Radiation Effects and Defects in Solids 158 (2003) 61-65

 

62.        G. Mandula, M. A. Ellabban, R. A. Rupp, M. Fally, E. Hartmann, L. Kovács, K. Polgár: Activation energy of proton migration in Mn- and Fe-doped lithium niobate obtained by holographic methods

Radiation Effects and Defects in Solids 158 (2003) 173-179

 

63.        S. Erdei, R. G. Schlecht, L. Kovács: Growth of PZN crystals with improved optical quality using the BSFT technique

IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control 50 (2003) 481-486

 

64.        A. Watterich, P. Aleshkevych, M. T. Borowiec, T. Zayarnyuk, H. Szymczak, E. Beregi, L. Kovács: Optical and Magnetic Spectroscopy of Rare Earth Doped Yttrium Aluminium Borate (YAl3(BO3)4) Single Crystals

Journal of Physics: Condensed Matter 15 (2003) 3323-3331

 

65.        L. Kovács, K. Lengyel, Á. Péter, K. Polgár, A. Beran: IR absorption spectroscopy of water in CsLiB6O10 crystals

Optical Materials 24 (2003) 457-463

 

66.        G. Dominiak-Dzik, P. Solarz, W. Ryba-Romanowski, E. Beregi, L. Kovács: Dysprosium-doped YAl3(BO3)4 (YAB) crystals: an investigation of radiative and non-radiative processes

Journal of Alloys and Compounds 359 (2003) 51-58

 

67.        G. Dominiak-Dzik, P. Solarz, W. Ryba-Romanowski, E. Beregi, E. Hartmann, L. Kovács: Optical properties and laser potential of dysprosium doped YAl3(BO3)4 (YAB) crystal

Radiation Effects and Defects in Solids 157 (2002) 1161-1165

 

68.        V. Szalay, L. Kovács, M. Wöhlecke, E. Libowitzky: Stretching potential and equilibrium length of the OH bond in solids

Chemical Physics Letters 354 (2002) 56-61

 

69.        G. Dominiak-Dzik, W. Ryba-Romanowski, M. Grinberg, E. Beregi, L. Kovács: Excited- state relaxation dynamics of Cr3+ in YAl3(BO3)4

Journal of Physics: Condensed Matter 14 (2002) 5229-5237

 

70.        B. Briat, A. Watterich, F. Ramaz, L. Kovács, B. C. Forget, N. Romanov: Charges states and optical transitions of vanadium in Bi4Ge3O12 identified by MCD and ODMR

Optical Materials 20 (2002) 253-262

 

71.        R. Capelletti, P. Beneventi, L. Kovács, W. B. Fowler: Multimode transitions of the tetrahedral MO4 units (M=Si,Ge,Ti) in sillenite single crystals

Physical Review B 66 (2002) 174307-1-12

 

72.        S. Bugaychuk, L. Kovács, G. Mandula, K. Polgár, R. A. Rupp: Wave-mixing solitons in ferroelectric crystals

Radiation Effects and Defects in Solids 157 (2002) 995-1001

 

73.        M. A. Ellabban, G. Mandula, R. A. Rupp, M. Fally, E. Hartmann, L. Kovács, K. Polgár: Activation energy of thermal fixing in LiNbO3: a comparative study.

Proceedings of SPIE 4607 (2002) 313-321

 

74.        M. Wöhlecke, L. Kovács: OH- ions in oxide crystals

Critical Reviews in Solid State and Materials Sciences 26 (2001) 1-86

 

75.        A. Watterich, L. Kovács, R. Würz, F. Schön, A. Hofstaetter, A. Scharmann: ESR and ENDOR study of the self-trapped hole in ZnWO4 single crystals

Journal of Physics: Condensed Matter 13 (2001) 1595-1607

 

76.        G. Mandula, K. Lengyel, L. Kovács, M. A. Ellabban, R. A. Rupp, M. Fally: Thermal fixing of holographic gratings in nearly stoichiometric LiNbO3 crystals

Proceedings of SPIE 4412 (2001) 226-230

 

77.        A. Baraldi, R. Capelletti, L. Kovács, C. Mora: FTIR spectroscopy of OH-induced defects in KTP single crystals

Radiation Effects and Defects in Solids 155 (2001) 355-359

 

78.        K. Lengyel, L. Kovács, G. Mandula, R. Rupp: Kinetics of OH- ions in nearly stoichiometric LiNbO3 crystals

Ferroelectrics 257 (2001) 255-262

 

79.        M. A. Ellabban, G. Mandula, M. Fally, R. A. Rupp, L. Kovács: Holographic scattering as a technique to determine the activation energy for thermal fixing in photorefractive materials

Applied Physics Letters 78 (2001) 844-846

 

80.        E. Beregi, A. Watterich, L. Kovács, J. Madarász: Solid state reactions in Y2O3 : 3Al2O3 : 4B2O3 system studied by FTIR spectroscopy and X-ray diffraction

Vibrational Spectroscopy 22 (2000) 169-173

 

81.        Zs. Szaller, L. Kovács, L. Pöppl: Comparative study of bismuth tellurites by infrared absorption spectroscopy

Journal of Solid State Chemistry 152 (2000) 392-396

 

82.        L. Kovács, E. Beregi, K. Polgár, Á. Péter: FTIR spectroscopy of borate crystals

Proceedings of SPIE 3724 (1999) 256-259

 

83.        M. T. Borowiec, H. Szymczak, M. Zaleski, P. Kaczor, L. Adamowicz, J. Strzeszewski, A. Watterich, L. Kovács: Raman and IR spectroscopy investigations of double tungstates

Proceedings of SPIE 3724 (1999) 288-291

 

84.        L. Kovács, S. Erdei, R.Capelletti: OH-  vibrational band in YVO4 crystals

Solid State Communications 111 (1999) 95-99

 

85.        M. Wierschem, C. Bäumer, A. Jovanovic, M. Wöhlecke, S. Kapphan, L. Kovács: Fundamental and overtone spectra of the OH and OD stretch mode in congruent and stoichiometric LiTaO3

physica status solidi (b) 215 (1999) R7

 

86.        G. Corradi, L. Kovács, I. M. Zaritskii: Optical absorption edge and some shallow donor levels in LiNbO3 systems

Radiation Effects and Defects in Solids 150 (1999) 211-219

 

87.        P. Beneventi, B. Briat, R. Capelletti, M. Gospodinov, L. Kovács, E. Mazocchi, A. Ruffini: Electronic and vibrational levels of the photochromic Mn in sillenites

Radiation Effects and Defects in Solids 150 (1999) 243-247

 

88.        R. Capelletti, P. Beneventi, L. Kovács, A. Ruffini: FTIR Spectroscopy to Monitor Impurities and Impurity-Interactions in Sillenite Crystals

Berichte der Bunsen-Gesellschaft für Physikalische Chemie 101 (1997) 1282-1285

 

89.        L. F. Bencs, K. Raksányi, O. Szakács, L. Kovács, A. Watterich, Á. Péter: Removal of iron, chromium and sodium impurities from zinc tungstate (ZnWO4)

Journal of Crystal Growth 181 (1997) 455-458

 

90.        E. Bandini, P. Beneventi, R. Capelletti, M. Gospodinov, L. Kovács: Vibrational spectroscopy of impurities in sillenite crystals

Materials Science Forum 239-241 (1997) 493-496

 

91.        E. Bandini, P. Beneventi, D. Bersani, R. Capelletti, M. Gospodinov, L. Kovács: FTIR spectroscopy of tetrahedrally coordinated impurities in sillenite crystals

Mikrochimica Acta [Suppl.] 14 (1997) 489-490

 

92.        L. Kovács, K. Polgár, Á. Péter, R. Capelletti: FTIR spectroscopy of OH- ions in borate single crystals

Mikrochimica Acta [Suppl.] 14 (1997) 523-524

 

93.        L. Kovács, G. Ruschhaupt, K. Polgár, G. Corradi, M. Wöhlecke: Composition dependence of the UV absorption edge in lithium niobate

Applied Physics Letters 70 (1997) 2801-2803

 

94.        K. Polgár, Á. Péter, L. Kovács, G. Corradi, Zs. Szaller: Growth of stoichiometric LiNbO3 single crystals by top seeded solution growth method

Journal of Crystal Growth 177 (1997) 211-216

 

95.        S. Erdei, L. Kovács, Á. Pető, J. Vandlik, P. D. Townsend, F. W. Ainger: Low temperature three-dimensional thermoluminescence spectra of undoped YVO4 single crystals grown by different techniques

Journal of Applied Physics 82 (1997) 2567-2571

 

96.        C. Zaldo, C. Coya, J. L. G. Fierro, K. Polgár, L. Kovács, Zs. Szaller: X-ray photoelectron spectroscopy and optical studies of Bi12(GaxBi1-x)O20-d and Bi12(ZnxBi1-x)O20-d single crystals

Journal of Physics and Chemistry of Solids 57 (1996) 1667-1672

 

97.        A. Watterich, L. Kovács, O. R. Gilliam, L. A. Kappers: Point defects identified by spectroscopic methods in ZnWO4 single crystals

Radiation Protection Dosimetry 65 (1996) 97-100

 

98.        M. Martini, F. Meinardi, L. Kovács, K. Polgár: Spectrally resolved thermoluminescence of Li2B4O7:Cu single crystals

Radiation Protection Dosimetry 65 (1996) 343-346

 

99.        S. Erdei, L. Kovács, M. Martini, F. Meinardi, F. W. Ainger, W. B. White: High temperature 3-D thermoluminescence spectra of Eu3+ doped YVO4-YPO4 powder systems reacted by hydrolyzed colloid reaction (HCR) technique

Journal of Luminescence 68 (1996) 27-34

 

100.    P. Beneventi, D. Bersani, P. P. Lottici, L. Kovács: A Raman study of Bi4(GexSi1-x)3O12 crystals

Solid State Communications 93 (1995) 143-146

 

101.    P. Beneventi, D. Bersani, P. P. Lottici, L. Kovács, F. Cordioli, A. Montenero, G. Gnappi: Raman study of Bi2O3-GeO2-SiO2 glasses

Journal of Non-Crystalline Solids 193 (1995) 258-262

 

102.    P. Beneventi, R. Capelletti, L. Kovács, Á. Péter, F. Ugozzoli: OH vibrational modes in sillenites

Radiation Effects and Defects in Solids 134 (1995) 213-217

 

103.    Kovács, P. Beneventi, R. Capelletti: OH absorption in Bi4Si3O12 single crystals

Radiation Effects and Defects in Solids 134 (1995) 287-291

 

104.    P. Beneventi, R. Capelletti, L. Kovács: Anharmonic effects on lattice vibration modes of sillenites

Radiation Effects and Defects in Solids 134 (1995) 293-297

 

105.    L. Kovács, S. G. Raymond, B. J. Luff, Á. Péter, P. D. Townsend: Thermoluminescence spectra of eulytine Bi4Si3O12 and Bi4Ge3O12 single crystals

Journal of Luminescence 60-61 (1994) 574-577

 

106.    P. Beneventi, R. Capelletti, L. Kovács, Á. Péter, A. M. Lanfredi Manotti, F. Ugozzoli: FTIR spectroscopy of OH stretching modes in BSO, BGO, and BTO sillenites

Journal of Physics: Condensed Matter 6 (1994) 6329-6344

 

107.    C. Zaldo, E. Moya, L. F. Magana, L. Kovács, K. Polgár: Optically induced gratings in Fe and Mn doped Bi4Ge3O12 single crystals

Journal of Applied Physics 73 (1993) 2114-2121

 

108.    L. Kovács, L. Rebouta, J. C. Soares, M. F. da Silva, M. Hage-Ali, J. P. Stoquert, P. Siffert, J. A. Sanz-Garcia, G. Corradi, Zs. Szaller, K. Polgár: On the lattice site of trivalent dopants and the structure of Mg2+-OH--M3+ defects in LiNbO3:Mg crystals

Journal of Physics: Condensed Matter 5 (1993) 781-794

 

109.    G. Mandula, L. Kovács, Á. Péter, E. Hartmann: Refractive index measurements on bismuth tellurium oxide (Bi2TeO5) single crystal

Optical Materials 1 (1992) 161-164

 

110.    L. Kovács, E. Moya, K. Polgár, F. J. López, C. Zaldo: Photochromic behaviour of doped Bi4Ge3O12 single crystal scintillators

Applied Physics A 52 (1991) 307-312

 

111.    L. Kovács, M. Wöhlecke, A. Jovanovic, K. Polgár, S. Kapphan: Infrared absorption study of the OH vibrational band in LiNbO3 crystals

Journal of Physics and Chemistry of Solids 52 (1991) 797-803

 

112.    L. Kovács, L. Rebouta, J. C. Soares, M. F. da Silva, M. Hage-Ali, J. P. Stoquert, P. Siffert, C. Zaldo, Zs. Szaller, K. Polgár: Lattice site of trivalent impurities in Mg-doped LiNbO3

Materials Science and Engineering B 9 (1991) 505-508

 

113.    L. Kovács, E. Moya, K. Polgár, F. J. López, C. Zaldo: Photochromic effect in Fe- and Mn-doped Bi4Ge3O12 crystals

Radiation Effects and Defects in Solids 119-121 (1991) 33-35          

 

114.    R. Capelletti, C. Mora, S. Prato, G. Calestani, I. Földvári, L.Kovács, A.Watterich: A new phase growth in LiF:Ti and LiF:Ti,Mg

Radiation Effects and Defects in Solids 119-121 (1991) 159-164

 

115.    L. Kovács, L. Rebouta, J. C. Soares, M. F. da Silva: Lattice site of Er in LiNbO3:Mg,Er crystals

Radiation Effects and Defects in Solids 119-121 (1991) 445-450

 

116.    L. Kovács, Zs. Szaller, I. Cravero, I. Földvári, C. Zaldo: OH-related defects in LiNbO3:Mg,M (M=Nd,Cr,Ti,Mn) crystals

Journal of Physics and Chemistry of Solids 51 (1990) 417-420

 

117.    L. Kovács, K. Polgár, R. Capelletti, C. Mora: Diffusion of hydrogen isotopes in pure and Mg-doped LiNbO3 crystals

physica status solidi (a) 120 (1990) 97-104

 

118.    L. Kovács, I. Földvári: IR spectra of OH in lithium niobate

EMIS Datareviews Series No. 5, INSPEC, IEE London and NY, 1989, pp.189-199.

 

119.    L. Kovács, K. Polgár: Electrical conductivity of lithium niobate

EMIS Datareviews Series No. 5, INSPEC, IEE London and NY, 1989, pp.109-114.

 

120.    L. Kovács, R. Sommerfeldt, Ye Ming, E. Kratzig: Light-induced charge transport in LiNbO3:Mg,Cr crystal

physica status solidi (a) 113 (1989) K75-K78

 

121.    L. Kovács, I. Földvári, I. Cravero, K. Polgár, R. Capelletti: An infrared absorption band caused by OH- ions in a LiNbO3:Mg,Cr crystal

Physics Letters A 133 (1988) 433-437

 

122.    L. Kovács, K. Polgár, R. Capelletti: IR absorption study of OH in pure and Mg-doped LiNbO3 crystals

Crystal Lattice Defects and Amorph. Mater. 15 (1987) 115-121

 

123.    R. Capelletti, W. Beall Fowler, G. Ruani, L. Kovács: IR spectroscopy to monitor OH and OD interaction with Ti  and Mg in LiF

Crystal Lattice Defects and Amorph. Mater. 16 (1987) 189-195

 

124.    R. Capelletti, C. Mora, G. Ruani, I. Földvári, L. Kovács, A. Watterich: Aggregation and nucleation processes of Ti3+ in LiF

Crystal Lattice Defects and Amorph. Mater. 16 (1987) 153-160

 

125.    L. Kovács, I. Földvári, K. Polgár: Characterization of  LiNbO3 crystals resistant to laser damage

Acta Physica Hungarica 61 (1987) 223-226

        

126.    K. Polgár, L.Kovács, I. Földvári, I. Cravero: Spectroscopic and electrical conductivity investigation on Mg-doped LiNbO3 single crystals

Solid State Communications 59 (1986) 375-379

 

127.    L. Kovács, K. Polgár: Density measurements on LiNbO3 crystals confirming Nb substitution for Li

Crystal Research and Technology 21 (1986) K101-K104

 

128.    L. Kovács, V. Szalay, R. Capelletti: Stoichiometry dependence of the OH absorption band in LiNbO3 crystals

Solid State Communications 52 (1984) 1029-1031

 

129.    E. Hartmann, L. Kovács, J. Paitz: Electrical conductivity of Gadolinium-Gallium Garnet (GGG) crystals

physica status solidi (a) 86 (1984) 401-405

 

130.    A. Watterich, L. Kovács, I. Földvári, I. Cravero: Ti related defects in LiF:Ti and LiF:Ti,Mg crystals

Radiation Effects 75 (1983) 253-261

 

131.    E. Hartmann, L. Kovács: Electrical conductivity of paratellurite (TeO2) crystals

physica status solidi (a) 74 (1982) 59-64

 

132.    L. Malicskó, L. Jeszenszky, E. Hartmann, L. Kovács, A. Péter, B. Vajna: The effect of dopants on the growth and properties of TGS crystals

Acta Physica Hungarica 53 (1982) 67-73