Single Crystalline Elastic Constants of Cubic MgCu2–MgZn2 Alloys
Single Crystalline Elastic Constants of Cubic MgCu2–MgZn2 Alloys
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DOI：
10.1063/1.1660629
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发表时间：
1971-06
影响因子：
3.2
通讯作者：
G. W. Shannette;J. Smith
中科院分区：
文献类型：
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作者：
G. W. Shannette;J. Smith
通过超声脉冲回波技术在4.2°-298 ° K温度范围和10-51-mol%MgZn2组成范围内测定了三元Laves相Mg（Cu，Zn）2的单晶弹性常数。弹性常数的组成依赖性表明，变化的电子浓度导致初始接触，然后由费米表面的布里渊区边界的后续重叠。这种接触发生在20-mol% MgZn 2附近，与先前测量的磁导率和比热相关。0°K时的德拜温度也由弹性常数的实验值确定。
The single crystalline elastic constants of the ternary Laves phase Mg(Cu, Zn)2 have been determined by the ultrasonic pulse‐echo technique over the temperature range 4.2°–298°K and over the composition range 10–51‐mol% MgZn2. The compositional dependence of the elastic contants indicates that a changing electron concentration causes initial contact and then a subsequent overlap of a Brillouin zone boundary by the Fermi surface. This contact occurs near 20‐mol% MgZn2 and correlates with previous measurements of magnetic susceptibilities and of specific heats. Debye temperatures at 0°K were also determined from the experimental values of the elastic constants.