稀土锰酸盐纳米颗粒复合体系的软化学制备及磁电阻增强效应

严纯华; 黄云辉; 朱涛; 王哲明; 陈省; 徐志刚; 廖春生

doi:10.3321/j.issn:0379-4148.2001.02.008

物理

稀土锰酸盐纳米颗粒复合体系的软化学制备及磁电阻增强效应

, , , , , ,

严纯华, 黄云辉, 朱涛, 王哲明, 陈省, 徐志刚, 廖春生. 2001: 稀土锰酸盐纳米颗粒复合体系的软化学制备及磁电阻增强效应, 物理, 30(2): 100-105. doi: 10.3321/j.issn:0379-4148.2001.02.008

引用本文:

2001: SOFT CHEMISTRY SYNTHESIS AND ENHANCED MAGNETORESISTANCE OF GRANULAR COMPOSITES OF LANTHANUM MANGANITES, Physics, 30(2): 100-105. doi: 10.3321/j.issn:0379-4148.2001.02.008

Citation:

2001: SOFT CHEMISTRY SYNTHESIS AND ENHANCED MAGNETORESISTANCE OF GRANULAR COMPOSITES OF LANTHANUM MANGANITES, Physics, 30(2): 100-105. doi: 10.3321/j.issn:0379-4148.2001.02.008

稀土锰酸盐纳米颗粒复合体系的软化学制备及磁电阻增强效应

现在中国科学院物理研究所

SOFT CHEMISTRY SYNTHESIS AND ENHANCED MAGNETORESISTANCE OF GRANULAR COMPOSITES OF LANTHANUM MANGANITES

摘要: 介绍了一类具有增强磁电阻效应的新型稀土锰酸盐多晶颗粒复合体系及其化学制备方法，并对增强的机理进行了衩步的探讨.
- 稀土锰酸盐 /
- 颗粒复合 /
- 磁电阻
Abstract: By soft chemical processing several lanthanum manganite nano- and micron-sized granular composites have been fabricated,including μm/nm La2/3Sr1/3MnO\-3,CoFe\-2O\-4/La0.7Sr0.3MnO3,Nd0.7Sr0.3MnO\-3/La0.7Sr0.3MnO\-3 and La2/3Ca1/3MnO\-3/PPP(poly para-phenyl) combined systems.Enhancement in magnetoresistance is observed in all these composites.Different compounds embedded in the granular manganites result in different temperature ranges where the enhancement occurs.It is believed that the phenomenon is associated with tunneling between various of grains and spin-dependent scattering.