| Sm0.99Gd0.01Al2金属间化合物的声学和比热容性质研究 |
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| 引用本文： | 苏金瑞,王克勤,屈继锋,朱长飞.Sm0.99Gd0.01Al2金属间化合物的声学和比热容性质研究[J].金属学报,2003,39(11):1186-1188. |
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| 作者姓名： | 苏金瑞 王克勤 屈继锋 朱长飞 |
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| 作者单位： | 1. 中国科学技术大学材料科学与工程系内耗与固体缺陷实验室,合肥,230026
2. 中国科学技术大学理学院,合肥,230026 |
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| 基金项目： | 国家自然科学基金50001011和中国科学技术大学青年基金资助项目 |
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| 摘 要： | 用感应悬浮冷坩锅法制备了单相性良好的Sm0.99Gd0.01Al2多晶金属间化合物．对其低温的声学和比热容性质进行了研究，得到了样品模量和声衰减以及随温度变化的规律．研究表明，在磁相变附近，样品的声学性质有剧烈的反常现象．比热容测量的结果表明这是一个二级相变．结合样品的磁性性质，对其声学特性进行了分析。
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| 关 键 词： | 金属间化合物Sm0.99Gd0.01Al2 模量 声衰减 比热容 |
| 文章编号： | 0412-1961(2003)11-1186-03 |
| 修稿时间： | 2003年7月9日 |
ACOUSTICAL PROPERTIES AND SPECIFIC HEAT CAPACITY OF Sm0.99Gd0.01Al2 INTERMETALLICS |
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| SU Jinrui,WANG Keqin,QU Jifeng,ZHU Changfei
Key Laboratory of Internal Friction and Defects in Solids.ACOUSTICAL PROPERTIES AND SPECIFIC HEAT CAPACITY OF Sm0.99Gd0.01Al2 INTERMETALLICS[J].Acta Metallurgica Sinica,2003,39(11):1186-1188. |
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| Authors: | SU Jinrui WANG Keqin QU Jifeng ZHU Changfei
Key Laboratory of Internal Friction and Defects in Solids |
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| Affiliation: | SU Jinrui,WANG Keqin,QU Jifeng,ZHU Changfei
Key Laboratory of Internal Friction and Defects in Solids,Department of Materials Science and Engineering,University of Science and Technology of China,Hefei 230026
School of Science,University of Science and Technology of China,Hefei 230026 |
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| Abstract: | Polycrystalline Sm0.99Gd0.01Al2 with single phase structure was prepared by cold crucible induction levitation method. The acoustical properties and specific heat of sample at low temperatures were studied, and the temperature dependences of modulus, sound attenuation and specific heat were obtained. The results show that the acoustical properties of sample display enormous anomalies in the vicinity of magnetic phase transition. Specific heat results manifest the magnetic phase transition to be a second order one. Analysis was made to the acoustical properties with consideration of its magnetic properties. |
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| Keywords: | intermetallics Sm0 99Gd0 01Al2 modulus sound attenuation specific heat capacity |
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