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HoFe1-xMnx03（x=0，0．1，0．2）的磁热效应研究
  • ISSN号：1000-3258
  • 期刊名称：《低温物理学报》
  • 时间：0
  • 分类：O482.5[理学—固体物理;理学—物理]
  • 作者机构：[1]上海大学物理系,上海大学,上海200444, [2]上海大学微结构重点实验室,上海大学,上海200444
  • 相关基金：国家自然科学基金项目（批准号：11274221,50932003）、上海市教育委员会科技创新项目（批准号：12YZ018）的资助.
作者： 谢慧[1], 袁淑娟[1], 曹义明[1], 杨亚[1], 康保娟[1], 鲁波[2], 曹世勋[1], 张金仓[1]
关键词： 自旋重取向, 反铁磁有序, 磁熵变, 磁热效应, spin reorientation, antiferromagnetic order, magnetic entropy change, magnetocaloric effect
中文摘要：

采用固相反应法制备了HoFe1-xMnx03（x=0，0．1，0．2）多晶样品，对其磁性和磁热效应进行了研究．随着Mn含量的增加，自旋重取向转变温区向高温方向移动，当Mn含量x=0．2时，自旋重取向转变温区达到210-220K；随着Mn元素掺杂量的增加，磁化强度先变强后变弱，Ho离子反铁磁有序温度先升高后降低．当Mn含量z=0．1时，由Ho离子反铁磁有序相变导致的磁熵变值在磁场为7T时达到最大，为-12．5J／kgK，制冷功率RC为298J／kg．实验结果表明少量Mn的引入有利于磁性和磁热效应的增强．

英文摘要：

HoFe1-xMnx03（x=0,0.1,0.2） polycrystalline samples were prepared by conventional solid state re- action method and their magnetic and magnetocaloric properties have been studied. The spin reorientation tempera- ture increases with increasing Mn doping, and the spin reorientation temperature reaches 210-220K for x= 0. 2. With the doping content of Mn increases, the magnetization first increases and then decreases, and the antiferromag- netic order temperature of Ho ion increases and then decreases. The largest magnetic entropy change of --12. 5 J/ kgK and refrigeration capacity of 298 J/kg were acquired at 7 T as x=0. 1, which is caused by Ho ion antiferromag- netie order. The studies show that low amount of Mn doping is helpful for enhancing magnetic and magnetocaloric effect.

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期刊信息
  • 《低温物理学报》
  • 北大核心期刊（2011版）
  • 主管单位:中国科学院
  • 主办单位:中国科学技术大学
  • 主编：赵忠贤
  • 地址：安徽省合肥市金寨路96号
  • 邮编：230026
  • 邮箱：LiBiyou@ustc.edu.cn
  • 电话：0551-3601359
  • 国际标准刊号：ISSN：1000-3258
  • 国内统一刊号：ISSN：34-1053/O4
  • 邮发代号:26-136
  • 获奖情况:
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  • 被引量:1577