Ferromagnetic Properties of Bond-Dilution and Random Positive or
Negative Uniaxial Anisotropy
Blume-Capel Model |
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Authors: | ZHU Hai-Xia and YAN Shi-Lei |
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Institution: | 1. Department of Physics, Suzhou University, Suzhou 215006, China
;2. Key Laboratory of Film Material of Jiangsu Province, Suzhou
University, Suzhou 215006, China
;3. CCAST (World Laboratory), P.O. Box 8730, Beijing 100080, China |
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Abstract: | We study the ferromagnetic properties of spin-1 system,
which is considered in the frame of the bond-dilution and random positive or
negative anisotropy Blume-Capel model in the effective field theory
and a cutting approximation. The investigation of phase diagrams displays
some rich properties of the trajectory of tricritical point, reentrant
phenomena at low temperatures. Under certain both bond concentrations and
random negative anisotropy, there are new transition lines of double
tricritical points. So special emphasis is placed on the influence of the
bond dilution and random anisotropy on phase diagrams. The magnetizations of
the system are also discussed. Some results have not been revealed in
previous reports. |
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Keywords: | ferromagnetic properties Blume-Capel model bond dilution random uniaxial anisotropy effective field theory |
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