Field Dependence of the Intrinsic Domain Magnetization of a Ferromagnet

T. Holstein and H. Primakoff
Phys. Rev. 58, 1098 – Published 15 December 1940
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Abstract

In this paper, the variation of the intrinsic domain magnetization of a ferromagnetic with the external magnetic field, is obtained. The basis of the treatment is the exchange interaction model amplified by explicit consideration of the dipole-dipole interaction between the atomic magnets. Approximations appropriate to low temperatures and equivalent to those used by Bloch in his derivation of the T1 law, are introduced. The resultant expression for the intrinsic volume susceptibility decreases slowly with increasing field; at high fields the functional dependence is as the inverse square root of the field. The variation with temperature is linear; at room temperature and for fields of about 4000 gauss, the order of magnitude of the (volume) susceptibility is 104. The results are compared with experiment and satisfactory agreement is found.

  • Received 31 July 1940

DOI:https://doi.org/10.1103/PhysRev.58.1098

©1940 American Physical Society

Authors & Affiliations

T. Holstein

  • New York University, New York, New York

H. Primakoff*

  • Polytechnic Institute of Brooklyn, Brooklyn, New York

  • *Present address: Queens College, Flushing, New York.

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Issue

Vol. 58, Iss. 12 — December 1940

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