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首页> 外文期刊>Journal of Applied Physics >Microstructural and magnetic properties of (La_(0.7)Sr_(0.3)MnO_3)_(0.7):(Mn_3O_4)_(0.3)nanocomposite thin films
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Microstructural and magnetic properties of (La_(0.7)Sr_(0.3)MnO_3)_(0.7):(Mn_3O_4)_(0.3)nanocomposite thin films

机译：（La_（0.7）Sr_（0.3）MnO_3）_（0.7）:( Mn_3O_4）_（0.3）纳米复合薄膜的微结构和磁性

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摘要

Epitaxial (La_(0.7)Sr_(0.3)MnO_3)_(0.7):(Mn_3O_4)_(0.3) (LSMO:Mn_3O_4) nanocomposite thin films were grown on SrTiO_3 (001) substrate by a pulsed laser deposition technique. The nanocomposite structures vary from triangular domains, to vertically aligned columns, and finally to smaller spherical domains as the deposition frequency varies from 1, 5, to 10 Hz, respectively. The strain in LSMO is systematically tuned, but that of the Mn_3O_4 phase is relatively stable as the deposition frequency increases. The tunable strain is found directly related to the different domain and grain boundary (GB) structures. Physical properties including saturation magnetization, Curie temperature (T_C), magnetoresistance and metal-insulator transition temperature (T_(MI)), all show systematic trends as the deposition frequency varies. This study reveals that the domain/GBs tunability achieved in nanocomposite thin films can affect the lattice strain and further tune their ferromagnetic properties.
机译：通过脉冲激光沉积技术在SrTiO_3（001）衬底上生长外延（La_（0.7）Sr_（0.3）MnO_3）_（0.7）:( Mn_3O_4）_（0.3）（LSMO：Mn_3O_4）纳米复合薄膜。随着沉积频率分别从1、5到10 Hz的变化，纳米复合结构从三角形区域变化到垂直排列的列，最后到较小的球形区域。 LSMO中的应变已得到系统地调整，但是Mn_3O_4相的应变随着沉积频率的增加而相对稳定。发现可调谐应变与不同的畴和晶界（GB）结构直接相关。随着沉积频率的变化，包括饱和磁化强度，居里温度（T_C），磁阻和金属-绝缘体转变温度（T_（MI））在内的物理特性均显示出系统的趋势。这项研究表明，在纳米复合薄膜中实现的畴/ GBs可调性可以影响晶格应变并进一步调节其铁磁性能。

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  • 来源
    《Journal of Applied Physics》 |2011年第5期|p.564-569|共6页
  • 作者

    Zhenxing Bi; Emily Weal; Honqmei Luo; Aiping Chen; Judith L MacManus-Driscoll; Quanxi Jia; Haiyan Wang;

  • 作者单位

    Department of Electrical and Computer Engineering, Texas A&M University, College Station,Texas 77843-3128, USA;

    Department of Materials Science and Metallurgy, University of Cambridge, Pembroke St., Cambridge,CB2 3QZ, United Kingdom;

    Department of Chemical Engineering, New Mexico State University, Las Cruces, New Mexico 88003, USA;

    Department of Electrical and Computer Engineering, Texas A&M University, College Station,Texas 77843-3128, USA;

    Department of Materials Science and Metallurgy, University of Cambridge, Pembroke St., Cambridge,CB2 3QZ, United Kingdom;

    Centerfor Integrated Nanotechnologies, Los Alamos National Laboratory, Los Alamos,New Mexico 87545, USA;

    Department of Electrical and Computer Engineering, Texas A&M University, College Station,Texas 77843-3128, USA;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);
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