Spin-1 Blume–Capel model with longitudinal random crystaland transverse magnetic fields：a mean-field approach

doi:10.1088/1674-1056/22/7/077501

中国物理B ›› 2013, Vol. 22 ›› Issue (7): 77501-077501.doi: 10.1088/1674-1056/22/7/077501

• CONDENSED MATTER: ELECTRONIC STRUCTURE, ELECTRICAL, MAGNETIC, AND OPTICAL PROPERTIES • 上一篇下一篇

Spin-1 Blume–Capel model with longitudinal random crystaland transverse magnetic fields：a mean-field approach

Erhan Albayrak

Department of Physics, Erciyes University, Kayseri 38039, Turkey

收稿日期:2012-12-17 修回日期:2013-02-23 出版日期:2013-06-01 发布日期:2013-06-01

Spin-1 Blume–Capel model with longitudinal random crystaland transverse magnetic fields：a mean-field approach

Erhan Albayrak

Department of Physics, Erciyes University, Kayseri 38039, Turkey

Received:2012-12-17 Revised:2013-02-23 Online:2013-06-01 Published:2013-06-01
Contact: Erhan Albayrak E-mail:albayrak@erciyes.edu.tr

摘要/Abstract

摘要： The spin-1 Blume-Capel model with transverse Ω and longitudinal external magnetic fields h in addition to a longitudinal random crystal field D is studied in the mean-field approximation. It is assumed that the crystal field is either turned on with probability p or turned off with probability 1-p on the sites of a square lattice. Then the phase diagrams are calculated on the reduced temperature-crystal field planes for given values of γ=Ω/J and p at zero h. Thus, the effect of changing γ and p are illustrated on the phase diagrams in a great detail and interesting results are observed.

关键词: random crystal field, transverse field, spin-1, Blume-Capel model

Abstract: The spin-1 Blume-Capel model with transverse Ω and longitudinal external magnetic fields h in addition to a longitudinal random crystal field D is studied in the mean-field approximation. It is assumed that the crystal field is either turned on with probability p or turned off with probability 1-p on the sites of a square lattice. Then the phase diagrams are calculated on the reduced temperature-crystal field planes for given values of γ=Ω/J and p at zero h. Thus, the effect of changing γ and p are illustrated on the phase diagrams in a great detail and interesting results are observed.

Key words: random crystal field, transverse field, spin-1, Blume-Capel model

中图分类号: (Classical spin models)

75.10.Hk

75.30.Kz (Magnetic phase boundaries (including classical and quantum magnetic transitions, metamagnetism, etc.)) 75.50.Gg (Ferrimagnetics)

Erhan Albayrak. Spin-1 Blume–Capel model with longitudinal random crystaland transverse magnetic fields：a mean-field approach[J]. 中国物理B, 2013, 22(7): 77501-077501.

Erhan Albayrak. Spin-1 Blume–Capel model with longitudinal random crystaland transverse magnetic fields：a mean-field approach[J]. Chin. Phys. B, 2013, 22(7): 77501-077501.

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Spin-1 Blume–Capel model with longitudinal random crystaland transverse magnetic fields：a mean-field approach

Spin-1 Blume–Capel model with longitudinal random crystaland transverse magnetic fields：a mean-field approach

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