Separation of Curie temperature and insulator-metal transition temperature in the La0.7Sr0.3MnO3 polycrystalline films and its effect on low field magnetoresistance

被引：9
作者：
Wu, Yingjie [1 ,2 ]
Ning, Xingkun [2 ]
Wang, Zhanjie [1 ,2 ,3 ]
Wang, Qiang [3 ]
Zhang, Zhidong [2 ]
机构：
[1] Northeastern Univ, Sch Met & Mat, Shenyang 110819, Peoples R China
[2] Chinese Acad Sci, Inst Met Res, Shenyang Natl Lab Mat Sci, Shenyang 110016, Peoples R China
[3] Northeastern Univ, Minist Educ, Key Lab Electromagnet Proc Mat, Shenyang 110819, Peoples R China
来源：
JOURNAL OF ALLOYS AND COMPOUNDS | 2016年 / 667卷
基金：
中国国家自然科学基金;
关键词：
La0.7Sr0.3MnO3; films; Pulsed laser deposition; Microstructures; Mn3+/Mn4+ ratios; Low field magnetoresistance; GIANT MAGNETORESISTANCE; ROOM-TEMPERATURE; THIN-FILMS; TRANSPORT-PROPERTIES; MAGNETIC-PROPERTIES;
D O I：
10.1016/j.jallcom.2016.01.193
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：
The polycrystalline La0.7Sr0.3MnO3 films were deposited on SiO2/Si substrates by pulsed laser deposition (PLD), and the temperature gap between Curie temperature (T-C) and insulator-metal transition temperature (T-IM) was tuned successfully by the deposition temperature and its influence on the LFMR properties was investigated. The results showed that the T-C was sensitive to the Mn3+/Mn4+ ratios, whereas the T-IM was sensitive to the microstructures in the LSMO films. The LFMR properties of the LSMO films were enhanced with increasing the Delta T values (Delta T = T-C - T-IM). Our results provide an effective way to modulate the functional properties of LSMO films by modulating the temperature gap between T-C and T-IM. (C) 2016 Elsevier B.V. All rights reserved.
引用
收藏
页码：317 / 322
页数：6
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