Magnetostriction in Tb .27 Dy .73 Fe 2 : Evidence for a low-temperature transition
Magnetostriction in Tb .27 Dy .73 Fe 2 : Evidence for a low-temperature transition
复制标题
DOI：
10.1109/tmag.1983.1062620
复制
发表时间：
1983-09
影响因子：
2.1
通讯作者：
K. Mori;J. Cullen;A. Clark
中科院分区：
文献类型：
--
作者：
K. Mori;J. Cullen;A. Clark
报道了Tb.27Dy.73Fe2单晶的磁致伸缩测量结果。在0-25kOe的磁场范围内，测量了298-3.1K范围内平行和垂直于111方向的长度变化。在280K以上的低场下，λ-H曲线显示饱和；低于280K时，λ变得越来越难以饱和，直到大约65K时，磁致伸缩开始再次增加。这一反转被认为是在低温和低磁场下，存在净磁矩在(Uuw)平面上的非共线亚铁磁相的证据。利用Ginsburg-Landau模型讨论了λ从共线的[100]-Easy相到[uuw]相的低温相变与温度和场的关系。
We report magnetostriction measurements on a single crystal of Tb .27 Dy .73 Fe 2 . Length changes parallel and perpendicular to a 111 direction were measured from 298 to 3.1K in magnetic fields from zero to 25kOe. The λ vs H curves show saturation at low fields above 280K; below 280K λ becomes progressively more difficult to saturate until approximately 65K at which temperature the magnetostriction begins to increase again. This upturn is taken as evidence for the existence, at low temperatures and low magnetic fields, of a non-colinear ferrimagnetic phase with the net moment in the (uuw) plane. The temperature and field dependence of λ is discussed by means of a Ginsburg-Landau model of the low temperature transition from a colinear, [100]-easy phase to the [uuw] phase.