Estimation of electronic and structural influence on the thermal magnetic properties of clusters
- 1 May 1994
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review B
- Vol. 49 (17) , 12291-12294
- https://doi.org/10.1103/physrevb.49.12291
Abstract
Using an effective Heisenberg model for clusters the spin-wave spectrum is calculated by direct diagonalization. The inclusion of a nonuniform magnetization profile at zero temperature, nonuniform exchange interactions as a result of structural relaxations, longer-range interactions, and of magnetic surface anisotropy have been studied. Very small effects are found on the thermal magnetic properties relative to those predicted for the simple nearest-neighbor Heisenberg model by Hendriksen, Linderoth, and Lindgård [J. Phys. C 31, 5675 (1993); Phys. Rev. B 48, 7259 (1993)].Keywords
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