制备压力对La2/3Sr1/3MnO3的磁电阻效应的影响

唐雁坤; 隋郁; 千正男; 刘玉强; 许大鹏; 苏文辉

doi:10.11858/gywlxb.2004.01.007

制备压力对La2/3Sr1/3MnO3的磁电阻效应的影响

doi: 10.11858/gywlxb.2004.01.007

1.
哈尔滨工业大学理学院凝聚态科学与技术研究中心，黑龙江哈尔滨 150001；
2.
吉林大学物理学院凝聚态物理系，吉林长春 130023

详细信息

通讯作者:
隋郁

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出版历程
- 收稿日期: 2003-04-07
- 修回日期: 2003-06-20
- 发布日期: 2004-03-05

Effect of Preparation Pressure on Magnetoresistance of La2/3Sr1/3MnO3

1.
Center for Condensed Matter Science and Technology, Harbin Institute of Technology, Harbin 150001, China;
2.
Department of Condensed Matter Physics, Institute of Physics, Jilin university, Changchun 130023, China

More Information

Corresponding author: SUI Yu

摘要

摘要: 研究了制备压力对纳米块状样品La2/3Sr1/3MnO3的结构、磁学和电学性质的影响。结果表明：样品的晶粒尺寸随制备压力的增加而变小，且不同样品的磁电阻效应不同。低场磁电阻效应在整个实验温区都随制备压力的升高而变弱，这主要是由制备压力使样品晶粒界面连接更紧密所导致；T200 K时，高场磁电阻效应随制备压力的升高而变强，T200 K时，高场磁电阻效应随制备压力的升高反而变弱，这主要是由制备压力改变样品的晶粒尺寸所引起。
- 低场 /
- 高场 /
- 磁电阻 /
- 尺寸
Abstract: The effect of preparation pressure on the structural, magnetic and electronic properties has been investigated for nanostructured bulk samples of La2/3Sr1/3MnO3. The results show that the grain size decreases and magnetoresistance varies with preparation pressure growth. Low-field magnetoresistance weakens in the whole experimental temperature range when preparation pressure increases, which can mainly attribute to stronglink grain boundaries of samples under high preparation pressure. And highfield magnetoresistance gradually becomes stronger at T200 K, however becomes weaker at T200 K with the increase of preparation pressure, which can mainly due to the change of grain size caused by preparation pressure.
- low-field /
- high-field /
- magnetoresistance /
- size

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参考文献(10)

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