Phase diagram of a random-anisotropy mixed-spin Ising model

被引：19

作者：

Vieira, AP ^{[1
]}

de Carvalho, JX ^{[1
]}

Salinas, SR ^{[1
]}

机构：

[1] Univ Sao Paulo, Inst Fis, BR-05315970 Sao Paulo, Brazil

来源：

PHYSICAL REVIEW B | 2001年 / 63卷 / 18期

关键词：

D O I：

10.1103/PhysRevB.63.184415

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We investigate the phase diagram of a mixed spin-1/2-spin-1 Ising system in the presence of quenched disordered anisotropy. We carry out a mean-field and a standard self-consistent Bethe-Peierls calculation. Depending on the amount of disorder, there appear additional transition lines and multicritical points. Also, we report some connections with a percolation problem and an exact result in one dimension.

引用

页数：7

共 15 条

[1] DILUTED ISING-MODEL ON LINEAR AND BETHE LATTICES [J].

BELL, GM .

JOURNAL OF PHYSICS C-SOLID STATE PHYSICS, 1975, 8 (05) :669-682

[2] A discussion of critical behaviour in a mixed-spin Ising model [J].

Bobak, A ;

Jurcisin, M .

PHYSICA A, 1997, 240 (3-4) :647-656

[3] Blume-Emery-Griffiths model in a random crystal field [J].

Branco, NS .

PHYSICAL REVIEW B, 1999, 60 (02) :1033-1037

[4] Numerical study of a mixed Ising ferrimagnetic system [J].

Buendia, GM ;

Novotny, MA .

JOURNAL OF PHYSICS-CONDENSED MATTER, 1997, 9 (27) :5951-5964

[5] Quenched randomness at first-order transitions [J].

Cardy, J .

PHYSICA A, 1999, 263 (1-4) :215-221

[6] MIXED-SPIN ISING-MODEL ON THE BETHE LATTICE [J].

DASILVA, NR ;

SALINAS, SR .

PHYSICAL REVIEW B, 1991, 44 (02) :852-855

[7]

DELIMA AL, IN PRESS J MAGN MAGN

[8] MIXED SPINS ISING-MODEL ON THE HONEYCOMB LATTICE [J].

GONCALVES, JR ;

GONCALVES, LL .

JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS, 1992, 104 :261-263

[9] UNIAXIAL ANISOTROPY EFFECTS IN THE ISING-MODEL - AN EXACTLY SOLUBLE MODEL [J].

GONCALVES, LL .

PHYSICA SCRIPTA, 1985, 32 (03) :248-252

[10] PHASE-TRANSITION OF THE MIXED SPIN SYSTEM WITH A RANDOM CRYSTAL-FIELD [J].

KANEYOSHI, T .

PHYSICA A, 1988, 153 (03) :556-566

← 1 2 →