Autor: |
B. Boechat, R.A. Filgueiras, C. E. Cordeiro, N. S. Branco |
Rok vydání: |
2002 |
Předmět: |
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Zdroj: |
Physica A: Statistical Mechanics and its Applications. 304:429-442 |
ISSN: |
0378-4371 |
DOI: |
10.1016/s0378-4371(01)00560-x |
Popis: |
We employ a real-space renormalization-group (RSRG) approach to study a mixed-spin (spin- 1 2 and spin-1) antiferromagnetic Ising 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 . |
Databáze: |
OpenAIRE |
Externí odkaz: |
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