Electronic Resource
Springer
The European physical journal
200 (1967), S. 270-286
ISSN:
1434-601X
Source:
Springer Online Journal Archives 1860-2000
Topics:
Physics
Notes:
Abstract The local magnetization in the vicinity of a nonmagnetic impurity in a Heisenberg ferromagnet is calculated for different temperatures below the Curie point. In the low-temperature region the spin-wave approximation is used and calculations are carried out up to first-order perturbation theory. The deviation of the magnetization from the value in a perfect magnet turns out to be proportional to T5/2 for very low temperatures. In the region 0.40 TC〈T〈TC numerical solutions are obtained for a molecular field model, under the assumption that the influence of the impurity has a finite range. Extrapolations of both sets of results fit reasonably well together for the nearest and next nearest neighbours of the impurity.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF01340531
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