Coexistence of Superconductivity and Ferromagnetism in La2-xSrxCuO4 Nanoparticles

被引：7

作者：

Yin, Yuewei ^{[1
]}

Liu, Hua ^{[1
]}

Xie, Liang ^{[1
]}

Su, Tongshang ^{[1
]}

Teng, Mengli ^{[1
]}

Li, Xiaoguang ^{[1
]}

机构：

[1] Univ Sci & Technol China, Hefei Natl Lab Phys Sci Microscale, Dept Phys, Hefei 230026, Peoples R China

来源：

JOURNAL OF PHYSICAL CHEMISTRY C | 2013年 / 117卷 / 06期

基金：

中国国家自然科学基金;

关键词：

PENETRATION DEPTH; DOPING DEPENDENCE; TEMPERATURE; TRANSPORT; TRANSITION; FIELD; FE;

D O I：

10.1021/jp3089808

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Magnetic and superconducting properties of La2-xSrxCuO4 nanoparticles are systematically studied as a function of particle size and Sr doping. Through the magnetization and electron spin resonance measurements, it was found that the suppression of superconductivity and enhancement of ferromagnetism were observed simultaneously with decreasing particle size, which should be related to the uncompensated Cu2+ spins and oxygen defects due to the increasing role of finite size. On the other hand, although Sr doping will introduce more uncompensated spins to the La2-xSrxCuO4 nanoparticles, the low temperature ferromagnetism is reduced. The results suggest that the suppression superconductivity and the appearance of ferromagnetism for the nanoparticles may be closely related to the destruction antiferromagnetic correlation in CuO2 planes.

引用

页码：3028 / 3035

页数：8

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