La_(0.65)Sr_(0.35-x)Na_xMnO_3的磁卡效应 |
| |
引用本文: | 李海波,冯明,李娜,刘梅,潘北诚. La_(0.65)Sr_(0.35-x)Na_xMnO_3的磁卡效应[J]. 吉林大学学报(工学版), 2009, 39(4): 945-947 |
| |
作者姓名: | 李海波 冯明 李娜 刘梅 潘北诚 |
| |
作者单位: | 吉林师范大学 凝聚态物理与材料科学研究所|吉林 四平 136000 |
| |
基金项目: | 吉林省科技发展计划项目(20060803) |
| |
摘 要: | 采用溶胶-凝胶技术制备了钙钛矿型稀土锰氧化物La0.65Sr0.35-xNaxMnO3(x=0.05,0.10,0.15),利用X射线衍射(XRD)和振动样品磁强计(VSM)对样品的结构、居里温度和磁卡效应进行了研究。结果表明,随着Na含量的增加,晶胞体积减小,居里温度提高,当x=0.15时,La0.65Sr0.35-xNaxMnO3的最大磁熵变达到了1.66 J/(kg.K)。
|
关 键 词: | 复合材料 锰氧化物 磁卡效应 居里温度 磁熵变 |
收稿时间: | 2007-11-12 |
修稿时间: | 2008-03-12 |
Magnetocalorie effect of La_(0.65)Sr_(0.35-x)Na_xMnO_3 |
| |
Abstract: | Perovskite-type manganites La0.65Sr0.35-xNaxMnO3(x=0.05,0.10,0.15) were prepared by sol-gel method.The structure,Curie temperature and magnetocalorie effect of the studied material were investigated by XRD and VSM.The results show that with the increase in the content of Na,the cell volume of La0.65Sr0.35-xNaxMnO3 decreases,and the Curie temperature shifts towards higher temperature.It is found that the maximum magnetic entropy change(ΔSM) for the La0.65Sr0.35-xNaxMnO3 with x=0.15 reaches a value of 1.66 J·(kg·K)-1. |
| |
Keywords: | composite material manganites magnetocaloric effect Curie temperature magnetic entropy change |
|
| 点击此处可从《吉林大学学报(工学版)》浏览原始摘要信息 |
|
点击此处可从《吉林大学学报(工学版)》下载全文 |
|