Crystal-field-induced magnetostrictions in the spin reorientation process of Nd$_2$Fe$_{14}$B-type compounds
arXiv:cond-mat/0402384 · doi:10.1016/j.jmmm.2003.12.615
Abstract
Volume expansion $ÎV / V$ 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, $ÎV / V$ is shown to be a direct measure of second order CEF energy. Calculated anomalies in $ÎV / V$ associated with the first-order magnetization process of Nd$_2$Fe$_{14}$B are presented, which well reproduced the observations.
2 pages, 2 figures, to appear in J. Magn. Magn. Mater