Magnetic Moments and Unpaired Spin Densities in the Fe-Rh Alloys

G. Shirane, R. Nathans, and C. W. Chen
Phys. Rev. 134, A1547 – Published 15 June 1964
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Abstract

The distribution of magnetic moments in the Fe-Rh system has been investigated by the neutron diffraction technique in the composition range between 35 and 50 at.%Rh. These alloys have chemical order of CsCl type; the body-corner positions are occupied by FeI atoms and the body centers by Rh and FeII atoms. The magnetic moments in ferromagnetic alloys containing 35, 40, and 48% Rh are μFeI=3.1 μB, μFeII=2.5 μB, and μRh=1.0 μB at 25°C. The moment of the FeI atom in the 50% Rh alloy, which is antiferromagnetic at room temperature, increases to 3.3 μB. A detailed study of the unpaired spin density distribution in the 48% Rh alloy was made by the polarized beam technique. While the FeI atom has a nearly spherical density distribution, that of the Rh atom shows a strong tendency towards eg symmetry. The coherent nuclear scattering amplitude of Rh was determined to be 0.585±0.005×1012 cm.

  • Received 22 January 1964

DOI:https://doi.org/10.1103/PhysRev.134.A1547

©1964 American Physical Society

Authors & Affiliations

G. Shirane and R. Nathans

  • Brookhaven National Laboratory, Upton, New York

C. W. Chen

  • Westinghouse Research Laboratories, Pittsburgh, Pennsylavnia

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Issue

Vol. 134, Iss. 6A — June 1964

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