Effects of annealing procedures on the structural and magnetic properties of epitaxial La0.7Sr0.3MnO3 films

被引：34
作者：
Du, YS
Wang, B [1 ]
Li, T
Yu, DB
Yan, H
机构：
[1] Beijing Univ Technol, Lab Thin Film Mat, Beijing 100022, Peoples R China
[2] Grirem Adv Mat Co Ltd, Beijing 100088, Peoples R China
来源：
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS | 2006年 / 297卷 / 02期
关键词：
La0.7Sr0.3MnO3; films; annealing procedures; oxygen; the coercivity;
D O I：
10.1016/j.jmmm.2005.02.062
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
The effects of annealing procedures on the structural and magnetic properties of the LSMO films epitaxially grown on (10 0) LaAlO3 (LAO) and SrTiO3 (STO) substrates have been studied. A gradual lattice contraction is observed with the increase of annealing temperatures. This can be explained as the increase in Mn4+/Mn3+ ratio before it reached the ideal one value (3:7). Annealing procedures at the higher temperatures can enhance the ferromagnetic order and Curie temperature (T-c) and dramatically reduce the coercivity values due to the increase in the oxygen content. On the other hand, a larger surface roughness caused by the lattice mismatch between the films and the substrates is presumably responsible for a higher coercivity. (C) 2005 Elsevier B.V. All rights reserved.
引用
收藏
页码：88 / 92
页数：5
相关论文
共 17 条
[11]   Correlation between magnetic homogeneity, oxygen content, and electrical and magnetic properties of perovskite manganite thin films [J].
Rajeswari, M ;
Shreekala, R ;
Goyal, A ;
Lofland, SE ;
Bhagat, SM ;
Ghosh, K ;
Sharma, RP ;
Greene, RL ;
Ramesh, R ;
Venkatesan, T ;
Boettcher, T .
APPLIED PHYSICS LETTERS, 1998, 73 (18) :2672-2674
[12]   Measurements of elastic constants in thin films of colossal magnetoresistance material [J].
So, JH ;
Gladden, JR ;
Hu, YF ;
Maynard, JD ;
Li, Q .
PHYSICAL REVIEW LETTERS, 2003, 90 (03) :4
[13]   Magnetic domain wall trapping by in-plane surface roughness modulation [J].
Swerts, J ;
Temst, K ;
Van Bael, MJ ;
Van Haesendonck, C ;
Bruynseraede, Y .
APPLIED PHYSICS LETTERS, 2003, 82 (08) :1239-1241
[14]   Colossal magnetoresistance effect of electron-doped manganese oxide thin film La1-xTexMnO3 (x=0.1,0.15) [J].
Tan, GT ;
Zhang, X ;
Chen, ZH .
JOURNAL OF APPLIED PHYSICS, 2004, 95 (11) :6322-6324
[15]   Effect of crystallinity on the transport properties of Nd0.67Sr0.33MnO3 thin films [J].
Wang, H ;
Zhang, X ;
Hundley, MF ;
Thompson, JD ;
Gibbons, BJ ;
Lin, Y ;
Arendt, PN ;
Foltyn, SR ;
Jia, QX ;
MacManus-Driscoll, JL .
APPLIED PHYSICS LETTERS, 2004, 84 (07) :1147-1149
[16]   Anneal-tunable Curie temperature and transport of La0.67Ca0.33MnO3 [J].
Worledge, DC ;
Snyder, GJ ;
Beasley, MR ;
Geballe, TH ;
Hiskes, R ;
DiCarolis, S .
JOURNAL OF APPLIED PHYSICS, 1996, 80 (09) :5158-5161
[17]   Dependence of the magnetocaloric effect on oxygen stoichiometry in polycrystalline La2/3Ba1/3MnO3-δ [J].
Zhong, W ;
Chen, W ;
Au, CT ;
Du, YW .
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS, 2003, 261 (1-2) :238-243
12