EPR Study of the Phase Transition in Dimethylammonium Gallium Sulfate Hexahydrate

• Authors: R. Hrabański , M. Janiec-Mateja , Z. Czapla
• Languages of publication: EN

Abstracts

EN

X-band electron paramagnetic resonance investigations of single crystals of Cr^{3+}-doped dimethylammonium gallium sulphate hexahydrate are presented from room temperature down to 110 K. The crystal undergoes a order-disorder phase transition to ferroelectric phase at 134 K and additionally a first-order transition into a low temperature non-ferroelectric phase at T_{c2}=116 K. The spin-Hamiltonian parameters were determined for paraelectric and ferroelectric phases. The spin-Hamiltonian parameters in the paraelectric phase are: g=1.982±0.002, b_2^0=(890±10)×10^{-4} cm^{-1}, b=(386±15)×10^{-4} cm^{-1}. Remarkable EPR line width changes confirm the order-disorder character of the ferroelectric phase transition. Additionally observed triplet lines demonstrate freezing-out of dimethylammonium reorientations which can be considered as a prime reason for this transition similarly as observed in dimethylammonium aluminium sulfate hexahydrate.

Keywords

EN

64.70.Kb; 76.30.Fc; 77.80.-e

Discipline

• 76.30.Fc: Iron group (3d) ions and impurities (Ti-Cu)
• 77.80.-e: Ferroelectricity and antiferroelectricity

• Publisher: Institute of Physics, Polish Academy of Sciences
• Journal: Acta Physica Polonica A
• Year: 2005
• Volume: 108
• Issue: 2
• Pages: 283-290

Dates

published

2005-08

received

2005-04-24

Contributors

author

R. Hrabański

• Institute of Physics, Częstochowa University of Technology, al. Armii Krajowej 19, 42-200 Częstochowa, Poland

author

M. Janiec-Mateja

• Institute of Physics, Częstochowa University of Technology, al. Armii Krajowej 19, 42-200 Częstochowa, Poland

author

Z. Czapla

• Institute of Experimental Physics, University of Wrocław, pl. Borna 8, 50-204 Wrocław, Poland

References

• 1. L.F. Kirpichnikova, A. Pietraszko, K. Lukaszewicz, L.A. Shuvalov, V.V. Dolbinina, L.M. Yakovleva, Crystallogr. Rep., 39, 990, 1994
• 2. L.F. Kirpichnikova, L.A. Shuvalov, N.R. Ivanov, B.N. Prasolov, E.F. Andreyev, Ferroelectrics, 96, 313, 1989
• 3. A. Pietraszko, K. Lukaszewicz, L.F. Kirpichnikova, Pol. J. Chem., 67, 1877, 1993
• 4. A. Pietraszko, K. Lukaszewicz, L.F. Kirpichnikova, Pol. J. Chem., 69, 922, 1995
• 5. V. Kapustianik, M. Bublyk, I. Polovinko, S. Sveleba, Z. Trybula, E. Andreyev, Phase Transit., 49, 231, 1994
• 6. V. Kapustianik, M. Fally, H. Kabelka, H. Warhanek, J. Phys., Condens. Matter, 9, 723, 1997
• 7. S. Dacko, Z. Czapla, Ferroelectrics, 189, 143, 1996
• 8. V.Yu. Kazimirov, V.A. Sarin, M.B. Smirnov, L.A. Shuvalov, Ferroelectrics, 299, 59, 2004
• 9. N. Alsabbagh, D. Michel, Z. Czapla, J. Furtak, Phys. Status Solidi A, 167, 77, 1998
• 10. G. Volkel, N. Alsabbagh, R. Bottcher, D. Michel, B. Milsch, Z. Czapla, J. Furtak, J. Phys., Condens. Matter, 12, 4553, 2000
• 11. G. Volkel, R. Bottcher, Z. Czapla, D. Michel, Ferroelectrics, 268, 181, 2002
• 12. W. Bednarski, S. Waplak, L.F. Kirpichnikova, J. Phys., Condens. Matter, 11, 1567, 1999
• 13. J. Dolinsek, M. Klanjsek, D. Arcon, Hae Jin Kim, J. Seliger, V. Zagar, Phys. Rev. B, 59, 3640, 1999
• 14. G. Volkel, R. Bottcher, D. Michel, Z. Czapla, Phys. Rev. B, 67, 24111, 2003
• 15. R. Hrabański, M. Janiec, M. Jackowska, V. Kapustianik, Appl. Magn. Reson., 27, 19, 2004
• 16. V.G. Grachev, Visual EPR program v. 2.08, Fachbereich Physik Universitat Osnabruck, Osnabruck 1998
• 17. C. Rudowicz, J. Phys., Condens. Matter, 12, L417, 2000
• 18. I.V. Stasyuk, O.V. Velychko, Phase Transit., 73, 483, 2001; 1567 (1999)

Identifiers

DOI

10.12693/APhysPolA.108.283