Renormalization-group magnetization of a ferrimagnetic Ising system

被引：50
作者：
Boechat, B
Filgueiras, RA
Cordeiro, C
Branco, NS
机构：
[1] Univ Fed Fluminense, Inst Fis, BR-24210340 Niteroi, RJ, Brazil
[2] Univ Fed Santa Catarina, Dept Fis, BR-88040900 Florianopolis, SC, Brazil
来源：
PHYSICA A-STATISTICAL MECHANICS AND ITS APPLICATIONS | 2002年 / 304卷 / 3-4期
关键词：
ferrimagnetism; compensation temperatures; renormalization group;
D O I：
10.1016/S0378-4371(01)00560-X
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
We employ a real-space renormalization-group (RSRG) approach to study a mixed-spin (spin-1/2 and spin-1) antiferromagnetic using model on the square lattice. The model incorporates next-nearest-neighbor interactions which are relevant to describe ferrimagnetism. We present an RSRG calculation of the spontaneous magnetization and compensation temperatures of the mixed-spin model. The influence of crystal-field and next-nearest-neighbor interactions on compensation temperatures is studied, the important physical ingredient that leads to the presence of these temperatures is the next-nearest-neighbor coupling between spins 1/2. (C) 2002 Elsevier Science B.V. All rights reserved.
引用
收藏
页码：429 / 442
页数：14
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