Critical Exponent β for the Magnetization of YIG
- 1 March 1970
- journal article
- research article
- Published by AIP Publishing in Journal of Applied Physics
- Vol. 41 (3) , 1274-1276
- https://doi.org/10.1063/1.1658910
Abstract
Recently Wojtowicz and Rayl suggested a method for determining β, the exponent describing the behavior of the magnetization below the critical point. We have applied this method to the study of YIG in low magnetic fields ranging from 5 to 350 Oe. The transition temperature was observed to decrease linearly with the square of the applied field (as predicted by the theory) for fields up to 50 Oe. Our data are best interpreted by proposing two values of β, namely, β=0.47 close to Tc (within 1°K) and β=0.36 for the temperature region from 1° to 120°K below Tc. Similar behavior has been reported for nickel and YFeO3. Our results add further support to the suggestion of Callen and Callen that values of β∼⅓ are not truly properties of the phase transition itself.This publication has 0 references indexed in Scilit: