Measurements of the heat capacity of diamond with different isotopic compositions

被引：32
作者：
Cardona, M
Kremer, RK
Sanati, M
Estreicher, SK
Anthony, TR
机构：
[1] Max Planck Inst Festkorperforsch, D-70569 Stuttgart, Germany
[2] Texas Tech Univ, Dept Phys, Lubbock, TX 79409 USA
[3] GE Corp Res & Dev, Schenectady, NY 12309 USA
来源：
SOLID STATE COMMUNICATIONS | 2005年 / 133卷 / 07期
关键词：
diamond; heat capacity; stable isotopes;
D O I：
10.1016/j.ssc.2004.11.047
中图分类号：
O469 [凝聚态物理学];
学科分类号：
070205 ;
摘要：
We report measurements of the heat capacity C,, of diamond with several isotopic compositions (C-12(1-x) C-13(x)) in the 20 - 280 K temperature range. The results, in particular the derivative of the specific heat with respect to the average isotopic mass, are compared with recent ab initio calculations. Agreement is good for T > 150 K. At lower temperatures, the samples with isotopic compositions different from the natural one display an anomalous increase in C-rho/T-3 with decreasing temperature which is attributed to the presence of metallic inclusions stemming from the metal used as a solvent in the high-pressure high-temperature growth process. (C) 2004 Elsevier Ltd. All rights reserved.
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收藏
页码：465 / 468
页数：4
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