期刊信息
- 刊名： 河北师范大学学报（自然科学版）Journal of Hebei Normal University (Natural Science)
- 主办： 河北师范大学
- ISSN： 1000-5854
- CN： 13-1061/N
- 中国科技核心期刊
- 中国期刊方阵入选期刊
- 中国高校优秀科技期刊
- 华北优秀期刊
- 河北省优秀科技期刊
La2/3Sr1/3MnO3的室温磁电阻效应
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1. 石家庄铁道学院数理系, 河北 石家庄 050043;
2. 河北师范大学物理学院, 河北 石家庄 050016 -
DOI：
Investigation on Room-temperature Magnetoresistance of La2/3Sr1/3MnO3
摘要/Abstract
采用溶胶凝胶法制备了La2/3Sr1/3MnO3多晶样品.X射线衍射测试结果表明样品具有钙钛矿结构.利用振动样品磁强计测量了粉体样品在室温下的磁性能,样品表现为铁磁性.对不同烧结温度下形成的块体样品的导电性以及磁电阻的研究表明,随着烧结温度的提高材料的金属绝缘体转变温度有所增加,说明材料的烧结温度对其电导性有很大的影响.
La2/3Sr1/3MnO3 polycrystalline powers were prepared by sol-gel method. The result of X-ray diffraction indicated that the powersexist with perovskite structure . The magnetic property of powders was characterized by using vibrating sample magnetometer. The sample shows ferromagnetism . The research of conductivity and magnetoresistance of bulk samples sintered at different temperatures revealed that with increasing sintered temperature the critical temperature at which the state of the sample transforms from metal to semiconductor increases,which indicates that the sintered temperature of this material affects its conductivity strongly