Hall Effect in Ferromagnetics

Robert Karplus and J. M. Luttinger
Phys. Rev. 95, 1154 – Published 1 September 1954
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Abstract

Both the unusually large magnitude and strong temperature dependence of the extraordinary Hall effect in ferromagnetic materials can be understood as effects of the spin-orbit interaction of polarized conduction electrons. It is shown that the interband matrix elements of the applied electric potential energy combine with the spin-orbit perturbation to give a current perpendicular to both the field and the magnetization. Since the net effect of the spin-orbit interaction is proportional to the extent to which the electron spins are aligned, this current is proportional to the magnetization. The magnitude of the Hall constant is equal to the square of the ordinary resistivity multiplied by functions that are not very sensitive to temperature and impurity content. The experimental results behave in such a way also.

  • Received 21 May 1954

DOI:https://doi.org/10.1103/PhysRev.95.1154

©1954 American Physical Society

Authors & Affiliations

Robert Karplus*

  • Department of Physics, University of California, Berkeley, California

J. M. Luttinger

  • Department of Physics, University of Michigan, Ann Arbor, Michigan

  • *On leave of absence from Harvard University, Cambridge, Massachusetts.

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Vol. 95, Iss. 5 — September 1954

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