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首页> 外文期刊>Journal of Applied Physics >Superconductivity suppression in YBa_2Cu_3O_(7-δ)/La_(0.7)Sr_(0.3)MnO_3 bilayer films
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Superconductivity suppression in YBa_2Cu_3O_(7-δ)/La_(0.7)Sr_(0.3)MnO_3 bilayer films

机译:YBa_2Cu_3O_(7-δ)/ La_(0.7)Sr_(0.3)MnO_3双层膜中的超导抑制

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摘要

We study the thickness effect of YBa_2Cu_3O_(7-δ) (YBCO) in YBCO/La_(0.7)Sr_(0.3)MnO_3 (LSMO) bilayer films, fabricated on LaAlO_3 (001) substrate using pulsed laser deposition technique. The thickness dependent transport behavior of YBCO layer in considered bilayer systems demonstrate a clear onset critical temperature at 60 K and 80 K for 100 nm and 200 nm thick YBCO layer systems, respectively, whereas 50 nm thick YBCO system reveals complete suppression in the superconductivity. With the increase in thickness of YBCO layer, the magnetoresistance (MR) data show both positive and negative MR. The positive MR in superconducting regime dominates the negative MR, suppress the double exchange interaction. The maximum magnetoresistance ratio ~81% at 64K and ~47% at 30K temperature are observed for 200 nm and 100nm YBCO layers, respectively. In YBCO(200 nm)/LSMO(200 nm) bilayer specimen, the temperature co-efficient of resistance is ~8.4% K~(-1) at 72 K which can be practical for bolometric performances and temperature sensors.
机译:我们研究了使用脉冲激光沉积技术在LaAlO_3(001)衬底上制备的YBCO / La_(0.7)Sr_(0.3)MnO_3(LSMO)双层薄膜中YBa_2Cu_3O_(7-δ)(YBCO)的厚度效应。在考虑的双层系统中,取决于厚度的YBCO层的传输行为表明,对于100 nm和200 nm厚的YBCO层系统,分别在60 K和80 K下有一个清晰的起始临界温度,而50 nm厚的YBCO系统显示出对超导性的完全抑制。随着YBCO层厚度的增加,磁阻(MR)数据同时显示正MR和负MR。超导体系中的正MR占主导地位,反导抑制了双交换相互作用。对于200 nm和100nm的YBCO层,分别在64K和30K温度下观察到的最大磁阻比分别为〜81%和〜47%。在YBCO(200 nm)/ LSMO(200 nm)双层样品中,在72 K时电阻的温度系数为〜8.4%K〜(-1),对于辐射热性能和温度传感器而言是实用的。

著录项

  • 来源
    《Journal of Applied Physics》 |2014年第23期|233905.1-233905.7|共7页
  • 作者单位

    Department of Physics, National Institute of Technology, Hamirpur, Himachal Pradesh 177 005, India;

    Department of Physics, National Institute of Technology, Hamirpur, Himachal Pradesh 177 005, India;

    UGC-DAE-Consortium for Scientific Research, Khandwa Road, Indore Madhya Pradesh 452 001, India;

    Centre for Material Science and Engineering, National Institute of Technology, Hamirpur, Himachal Pradesh 177 005, India, Beant College of Engineering and Technology, Gurdaspur, Punjab 143 521, India;

  • 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);
  • 原文格式 PDF
  • 正文语种 eng
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