Article ID Journal Published Year Pages File Type
1621021 Journal of Alloys and Compounds 2009 5 Pages PDF
Abstract

The magnetostriction and thermal expansion of Er2Fe14−xCoxB (x = 1, 3 and 5) intermetallic compounds were measured, using the strain gauge method in the temperature range 75–450 K under applied magnetic fields up to 1.5 T. For all samples the longitudinal magnetostriction (λl) undergoes an anomaly around the spin reorientation temperature (TSR). It is also observed that λl decreases with increasing the Co content. All compounds show saturation type behaviour in their anisotropic magnetostriction curves at different temperatures and applied fields. The saturation behaviour of the compound with x = 3 occurs at higher temperatures than with x = 1 and 5. The volume magnetostriction strongly increases below μ0H = 0.3 T, then monotonically rises with applied field up to the spin reorientation temperature. An invar type behaviour is observed above 200 K in the compound with x = 1. The results are discussed based on the temperature dependence of magnetocrystalline anisotropy of compounds below and above their TSR.

Related Topics
Physical Sciences and Engineering Materials Science Metals and Alloys
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