Theory of the Heisenberg Superparamagnet

Artur Hahn
Phys. Rev. B 1, 3133 – Published 1 April 1970
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Abstract

The concept of uniform bulk magnetization in superparamagnetic particles is examined critically. By a straightforward idealization of the conditions met in actual superparamagnetic samples, it is shown that this concept is related to a fundamental problem of the physical statistics of magnetic first-order phase transitions. Thus, the fact that the concept is applicable to experimental data on superparamagnets has far-reaching consequences with respect to the nature of the magnetic transition at zero field.

  • Received 15 September 1969

DOI:https://doi.org/10.1103/PhysRevB.1.3133

©1970 American Physical Society

Authors & Affiliations

Artur Hahn

  • Institut für Werkstoffe der Elektrotechnik, Ruhr—Universität Bochum, Germany

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Issue

Vol. 1, Iss. 7 — 1 April 1970

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