Initial magnetization, remanence, and coercivity of the random anisotropy amorphous ferromagnet

E. Callen, Y. J. Liu, and J. R. Cullen
Phys. Rev. B 16, 263 – Published 1 July 1977
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Abstract

We analyze the coercivity, remanence, and initial magnetization of a single-domain, single-component amorphous material. We assume a uniform ferromagnetic exchange and concentrate on the effect of single-ion anisotropy. We find a threshold anisotropy below which the coercivity is zero. At large anisotropy, the coercivity is proportional to the anisotropy energy. Exchange pulling increases the remanence of amorphous materials. We suggest that exchange pulling between crystallites may also be operative in small-grain metallic polycrystals.

  • Received 22 February 1977

DOI:https://doi.org/10.1103/PhysRevB.16.263

©1977 American Physical Society

Authors & Affiliations

E. Callen*

  • American University, Washington, D.C. 20016 and Naval Surface Weapons Center, Silver Spring, Maryland 20910

Y. J. Liu*

  • American University, Washington, D. C. 20016

J. R. Cullen†

  • Naval Surface Weapons Center, Silver Spring, Maryland 20910

  • *Supported by the Office of Naval Research, the National Science Foundation, and the Naval Surface Weapons Center.
  • †Supported in part by the NSWC Independent Research Fund.

Comments & Replies

Temperature dependence of the magnetic properties of ferromagnetic amorphous alloys

P. Gaunt
Phys. Rev. B 19, 521 (1979)

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Vol. 16, Iss. 1 — 1 July 1977

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