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
  • [1] Growth and relaxation mechanisms in La0.66Sr0.33MnO3 manganites deposited on SrTiO3(001) and MgO(001)
    Casanove, MJ
    Roucau, C
    Baulès, P
    Majimel, J
    Ousset, JC
    Magnoux, D
    Bobo, JF
    [J]. APPLIED SURFACE SCIENCE, 2002, 188 (1-2) : 19 - 23
  • [2] Influence of controlled oxygen vacancies on the magnetotransport and magnetostructural phenomena in La0.85Sr0.15MnO3-delta single crystals
    DeLeonGuevara, AM
    Berthet, P
    Berthon, J
    Millot, F
    Revcolevschi, A
    Anane, A
    Dupas, C
    LeDang, K
    Renard, JP
    Veillet, P
    [J]. PHYSICAL REVIEW B, 1997, 56 (10) : 6031 - 6035
  • [3] Substrate effect on the magnetic microstructure of La0.7Sr0.3MnO3 thin films studied by magnetic force microscopy
    Desfeux, R
    Bailleul, S
    Da Costa, A
    Prellier, W
    Haghiri-Gosnet, AM
    [J]. APPLIED PHYSICS LETTERS, 2001, 78 (23) : 3681 - 3683
  • [4] Oxygen pressure and thickness dependent lattice strain in La0.7Sr0.3MnO3 films
    Dho, J
    Hur, NH
    Kim, IS
    Park, YK
    [J]. JOURNAL OF APPLIED PHYSICS, 2003, 94 (12) : 7670 - 7674
  • [5] Deposition conditions of magnetoresistance in La0.67Ca0.33MnO3-delta thin film
    Guo, JQ
    Takeda, H
    Kazama, NS
    Fukamichi, K
    Tachiki, M
    [J]. JOURNAL OF APPLIED PHYSICS, 1997, 81 (11) : 7445 - 7449
  • [6] Effect of interface roughness on hysteresis loops of ultrathin Co films from 2 to 30 ML on Cu(001) surfaces
    Jiang, Q
    Yang, HN
    Wang, GC
    [J]. SURFACE SCIENCE, 1997, 373 (2-3) : 181 - 194
  • [7] Magnetic inhomogeneity and colossal magnetoresistance in manganese oxides
    Ju, HL
    Sohn, H
    [J]. JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS, 1997, 167 (03) : 200 - 208
  • [8] DEPENDENCE OF GIANT MAGNETORESISTANCE ON OXYGEN STOICHIOMETRY AND MAGNETIZATION IN POLYCRYSTALLINE LA0.67BA0.33MNOZ
    JU, HL
    GOPALAKRISHNAN, J
    PENG, JL
    LI, Q
    XIONG, GC
    VENKATESAN, T
    GREENE, RL
    [J]. PHYSICAL REVIEW B, 1995, 51 (09): : 6143 - 6146
  • [9] Effect of surface roughness on magnetic properties of Co films on plasma-etched Si(100) substrates
    Li, M
    Wang, GC
    Min, HG
    [J]. JOURNAL OF APPLIED PHYSICS, 1998, 83 (10) : 5313 - 5320
  • [10] COERCIVITY OF EPITAXIAL MAGNETIC GARNET CRYSTALS
    PARDAVIHORVATH, M
    [J]. IEEE TRANSACTIONS ON MAGNETICS, 1985, 21 (05) : 1694 - 1699
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