| Er2-xPrxFe17磁致冷合金在室温区的磁熵变 |
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| 引用本文： | 钟喜春,刘正义,曾德长,张锦,魏兴钊.Er2-xPrxFe17磁致冷合金在室温区的磁熵变[J].稀有金属材料与工程,2005,34(7):1065-1068. |
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| 作者姓名： | 钟喜春 刘正义 曾德长 张锦 魏兴钊 |
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| 作者单位： | 华南理工大学,广州,510640 |
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| 基金项目： | 广东省自然科学基金重点项目(C013003);华南理工大学自然科学基金项目(305-E5040360);广东省稀土办重点项目(102-B25770);广东省高教厅重点项目(102-B24480);中国教育部骨干教师计划项目(305-D40130) |
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| 摘 要： | 在氩保护气氛中用熔炼法制备了Er2-xPrxFe17系列合金，通过X射线衍射和SQUID磁强计研究了样品的结构和磁熵变。结果表明，Er2-xPrxFe17系列合金具有六方Th2Ni17型结构，通过成分微调使其居里温度处在室温附近，Er2-xPrxFe17合金有较大的磁熵变，且致冷温区较宽，是一类有很大应用潜力的室温磁致冷材料。
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| 关 键 词： | Er2-xPrxFe17合金 磁致冷 磁熵变 |
| 文章编号： | 1002-185X(2005)07-1065-04 |
| 修稿时间： | 2003年12月15 |
Magnetic Entropy Changes of Er2-xPrxFe17 Magnetic Refrigeration Alloys at Room Temperature Range |
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| Zhong Xichun,Liu Zhengyi,Zeng Dechang,Zhang Jin,Wei Xingzhao.Magnetic Entropy Changes of Er2-xPrxFe17 Magnetic Refrigeration Alloys at Room Temperature Range[J].Rare Metal Materials and Engineering,2005,34(7):1065-1068. |
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| Authors: | Zhong Xichun Liu Zhengyi Zeng Dechang Zhang Jin Wei Xingzhao |
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| Abstract: | A series of Er2-xPrxFe17 alloys were prepared by the arc melting under the purified argon atmosphere. By means of X-ray diffraction pattern and SQUID magnetometer, the structure and magnetic entropy changes in Er2-xPrxFe17 alloys were investigated. The results show that the crystal structure is Th2Ni17-type hexagonal for Er2-xPrxFe17 alloys; the Curie temperature of Er2-xPrxFe17 alloys can be shifted to the room temperature around by a small adjustment of composition. Magnetic entropy changes (-?SM) near Curie temperature are relatively large in a comparatively wide temperature range for Er2-xPrxFe17 alloys. Er2-xPrxFe17 alloys are provided with great potential in application for the room-temperature magnetic refrigeration |
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| Keywords: | Er_(2-x)Pr_xFe_(17) alloys magnetic refrigeration magnetic entropy change |
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