Crystal-field-induced magnetostrictions in the spin reorientation process of Nd$_2$Fe$_{14}$B-type compounds

Details Crystal-field-induced magnetostrictions in the spin reorientation process of Nd$_2$Fe$_{14}$B-type compounds Crystal-field-induced magnetostrictions in the spin reorientation process of Nd$_2$Fe$_{14}$B-type compounds

2004-02-14

arxiv.org/abs/cond-mat/0402384v1

Physics

Condensed Matter

Materials Science

2 pages, 2 figures, to appear in J. Magn. Magn. Mater

Scientific paper

10.1016/j.jmmm.2003.12.615

Volume expansion $\Delta V / V$ associated with the spin reorientation process of Nd$_2$Fe$_{14}$B-type compounds has been investigated in terms of simple crystalline-electric-field (CEF) model. In this system, $\Delta V / V$ is shown to be a direct measure of second order CEF energy. Calculated anomalies in $\Delta V / V$ associated with the first-order magnetization process of Nd$_2$Fe$_{14}$B are presented, which well reproduced the observations.

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