Test of Spin-Wave Theory with Precision Magnetization Measurements
- 1 April 1959
- journal article
- Published by AIP Publishing in Journal of Applied Physics
- Vol. 30 (4) , S229-S230
- https://doi.org/10.1063/1.2185901
Abstract
Magnetic moment measurements of single crystal nickel, made from 4.2° to 290°K in a uniform magnetizing field applied along principal crystallographic directions, are presented. The precision of the measurements permits accurate comparison with predictions of spin-wave theory. At low temperatures (less than 150°K) Δσ ∝ T1.5±0.1 in agreement with spin-wave theory. Deviations from the T1.5 law, observed at high temperatures, are much larger than predicted by high-order terms of spin-wave theory. Possible sources for the effect, including temperature variation of g value and/or exchange constant, are summarized. Estimates of exchange constant are given.This publication has 8 references indexed in Scilit:
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