Lattice Distortion and Magnetic Inhomogeneity in Fe-Ni Invar Alloy
- 1 March 1981
- journal article
- Published by IOP Publishing in Japanese Journal of Applied Physics
- Vol. 20 (3), 571-574
- https://doi.org/10.1143/jjap.20.571
Abstract
X-ray diffraction and magnetization measurements were carried out on Invar alloy with magnetic inhomogeneity over the temperature range from room temperature to 400°C. The temperature dependence of the lattice strains on the (311), (220) and (200) planes were calculated from the diffraction line breadths. It was found that the average lattice strain (Δ d/d) at room temperature amounts to 1.17×10-3 and almost vanishes above the Curie temperature, and furthermore the temperature dependence is similar to the temperature dependence of the magnetization. The origin of the large lattice-distortion is discussed on the basis of the anomalous magnetovolume effect and the related lattice instability in Invar composition.Keywords
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