PHASE TRANSITIONS AND MULTICRITICAL POINTS IN THE MIXED SPIN-2 AND SPIN-7/2 ISING FERRIMAGNETIC SYSTEM WITH TWO CRYSTAL FIELD INTERACTIONS
Keywords:
Mixed spin system, Ising model, Sublattice magnetization, Critical points, AnisotropyAbstract
The critical temperatures of the mixed spin-2 and spin-7/2 Ising ferrimagnetic system with two crystal-field interactions, DA for spin-2 and DB for spin-7/2, are investigated in the absence of an external magnetic field by using the mean-field theory based on Bogoliubov inequality for the free energy. The ground-state phase diagram is constructed.The phase diagrams of the critical temperatures are obtained in the temperature-anisotropy plane and the thermal variation of the sublattice magnetizations is investigated in detail. Besides the second-order phase transition lines, two types of the first-order lines; one ending at tricritical points and the other ending at isolated critical points, are found
References
O. Khan, Molecular Magnetism, VCH Publishers, NewYork, 1993.
T. Mallah, S. Thiebaut, M. Vardegauer, P. Veillet, Science. 262 (1993) 1554.
H. Okawa, N. Matsumoto, H. Tamaki, M. Ohba, Mol. Cryst. Liq. Cryst. 233(1993) 257.
C. Mathoniere, C.J. Nutall, S.G. Carling, P. Day, Inorg. Chem. 35 (1996) 1201.
M. Drillon, E. Coronado, D. Beltran, R. Georges, J. Chem. Phys. 79 (1983) 449.
J. Manriquez, G.T. Lee, R. Scott, A. Epstein, and J. Miller, Science. 252 (1991) 1415.
W. Jiang, G.Z. Wei, and Z.Z. Zhang, Phys. Rev. 68 (2003) 134432.
T. Kaneyoshi and J. C. Chen, J. Magn. Magn. Mater. 98 (1991). 201.
T. Kaneyoshi, J. Phys. Soc. Japan. 56 (1987). 2675
T. Kaneyoshi, Physica A. 153 (1988). 556
T. Kaneyoshi, J. Magn. Magn. Mat. 92 (1990). 59
A. Benyoussef, A. El Kenz, and T. Kaneyoshi, J. Magn. Magn. Mat. 131 (1994)173.
A. Benyoussef, A. El Kenz, and T. Kaneyoshi, J. Magn. Magn. Mat. 131 (1994). 179.
H. K. Mohamad, E. P. Domashevskaya, and A. F. Klinskikh, Physica A 388 (2009) 4713.
A. Bobak, M. Jurcisin, Physica A. 240 (1997) 647.
J.W. Tucker, J. Magn. Magn. Mater. 195 (1999) 733.
S. G. A. Quadros and S. R. Salinas, Physica A. 206 (1994) 479.
G. M. Zhang, C. Z. Yang, Phys. Rev. B. 48 (1993) 9452.
G. M. Buendia, M. A. Novotny, J. Phys.: Condens. Matter. 9 (1997) 5951.
G. M. Buendia, J. A. Liendo, J. Phys.: Condens. Matter 9 (1997) 5439.
M. Godoy, W. Figueiredo, Phys. Rev. E 61 (2000) 218; 65 (2002) 026111, 66 (2002) 036131.
G. Wei, Q. Zhang, and Y. Gu, J. Magn. Magn. Mater. 301 (2006) 245.
G. Wei, Y. Gu, Jing Liu, Phys. Rev. B 74 (2006) 024422.
M. Žukovič, A. Bobak, Physica A 389 (2010) 5401.
M. Žukovič and A. Bobak, J. Magn. Magn. Mater. 322 (2010) 2868.
R. A. Yessoufou, S. Bekhechi, F. Hontinfinde, Eur. Phys. J. B 81 (2011) 137.
A. Bobak, Physica A 258 (1998) 140.
A. Bobak, Physica A 286 (2000) 531.
A. Bobak, O.F. Abubrig, D. Horvath, J. Magn. Magn. Mater. 246 (2002) 177.
O.F. Abubrig, D. Horvath, A. Bobak, M. Jaščur, Physica A 296 (2001) 437.
J.W. Tucker, J. Magn. Magn. Mater. 237 (2001) 215.
Y. Nakamura, J.W. Tucker, IEEE Trans. Magn. 38 (2002) 2406.
A. Bobak, J. Dely, J. Magn. Magn. Mater. 310 (2007). 1419.
E. Albayrak . Physica A. 375 (2007) 174-184.
B. Deviren, E. Kantar, E, M. Keskin, Journal of the Korean Physical Society, 56 (2010) 1738.
F. Abubrig, Open Journal of Applied Sciences, 3 (2013) 218.
F. Abubrig, Open Journal of Applied Sciences, 3 (2013) 270.
N. De La Espriella Velez, J. Madera Yancez, M. S. Paez Mesa, Revista Mexicana de Fisica60(2014) 419.
H. Falk, Am. J. Phys. 38 (1970) 858.
Downloads
Published
Issue
Section
License
Copyright (c) 2016 Journal of Basic Sciences
This work is licensed under a Creative Commons Attribution 4.0 International License.
