Magneto-Elastic Interactions in Gadolinium
Magneto-Elastic Interactions in Gadolinium
复制标题
钆的磁弹性相互作用
DOI：
10.1103/physrev.178.775
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发表时间：
1969
期刊：
影响因子：
--
通讯作者：
R. Stern
中科院分区：
文献类型：
--
作者：
M. Long;A. Wazzan;R. Stern
本文用脉冲回波技术测量了单晶钆的易磁化方向变化对弹性常数c_（33）和c_（44）的影响。其中一个常数${c}_{33}$在-37 ~-51\ifmmode\circ\else\textdegree\fi {}C的温度范围内急剧下降约2%，之后它慢慢恢复到正常的、随温度降低单调增加的行为。磁场高达8千奥斯特，平行或垂直于六方晶体的唯一轴，施加到样品。这些降低了${c}_{33}$变化的绝对幅度。据认为，声波耦合到自旋结构的体积磁致伸缩。
The effect of the change in easy direction of magnetization on the elastic constants ${c}_{33}$ and ${c}_{44}$ has been measured in single-crystal gadolinium by means of a pulse-echo technique. One of the constants ${c}_{33}$ exhibited a sharp decrease of about 2% over the temperature range -37 to -51\ifmmode^\circ\else\textdegree\fi{}C after which it slowly returned to its normal, monotonic increasing behavior with decreasing temperature. Magnetic fields of up to 8 kOe, either parallel or perpendicular to the unique axis of the hexagonal crystal, were applied to the sample. These decreased the absolute magnitude of the change in ${c}_{33}$. It is thought that the acoustic wave is coupled to the spin structure by volume magnetostriction.