Strong tensile strain induced charge/orbital ordering in (001)-La7/8Sr1/8MnO3 thin film on 0.7Pb(Mg1/3Nb2/3)O3-0.3PbTiO3

被引：38
作者：
Wang, J. [1 ]
Hu, F. X. [1 ]
Li, R. W. [2 ]
Sun, J. R. [1 ]
Shen, B. G. [1 ]
机构：
[1] Chinese Acad Sci, Inst Phys, State Key Lab Magnetism, Beijing 100190, Peoples R China
[2] Chinese Acad Sci, NIMTE, Ningbo 315201, Zhejiang, Peoples R China
来源：
APPLIED PHYSICS LETTERS | 2010年 / 96卷 / 05期
基金：
中国国家自然科学基金; 北京市自然科学基金;
关键词：
ferroelectric ceramics; ferroelectric thin films; lanthanum compounds; lead compounds; metal-insulator transition; piezoelectricity; strontium compounds; substrates; LA1-XSRXMNO3; TRANSITION;
D O I：
10.1063/1.3298360
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
The substrate-induced strain effect in La7/8Sr1/8MnO3 (LSMO) thin films grown on (001)-oriented SrTiO3 and ferroelectric 0.7Pb(Mg1/3Nb2/3)O-3-0.3PbTiO(3) (PMN-PT) substrates was investigated. A metal-insulator transition was observed at low temperature in LSMO/PMN-PT, which was ascribed to charge/orbital ordering (COO) formation due to a large tensile strain. The impact of strain modification on the transport properties around COO transition was investigated by using converse piezoelectric effect in PMN-PT. We found the magnetoresistance reduction due to the strain modification at COO state was much larger than that at disordering one, indicating the sensitivity of the COO phase to strain state. This fact presents a collateral evidence for the tensile strain origin of the COO transition.
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页数：3
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