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Oxygen vacancies effects on phase diagram of epitaxial La1–x Sr x MnO3 thin films

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Abstract

We investigated the effects of oxygen vacancies on the structural, magnetic, and transport properties of La1–x Sr x MnO3 (x=0.1, 0.2, 0.33, 0.4, and 0.5) grown around a critical point (without/with oxygen vacancies) under low oxygen pressure (10 Pa) and high oxygen pressure (40 Pa). We found that all films exhibit ferromagnetic behavior below the magnetic critical temperature, and that the films grown under low oxygen pressures have degraded magnetic properties with lower Curie temperatures and smaller magnetic moments. These results show that in epitaxial La1–x Sr x MnO3 thin films, the magnetic and transport properties are very sensitive to doping concentration and oxygen vacancies. Phase diagrams of the films based on the doping concentration and oxygen vacancies were plotted and discussed.

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Authors and Affiliations

  1. Institute of Physics, Chinese Academy of Sciences, Beijing, 100190, China

    Qian Wan, KuiJuan Jin, QingQing Li, YaQing Feng, Can Wang, Chen Ge, Meng He, HuiBin Lu, HaiZhong Guo & GuoZhen Yang

  2. University of Chinese Academy of Sciences, Beijing, 100049, China

    Qian Wan, KuiJuan Jin, YaQing Feng, Can Wang & GuoZhen Yang

  3. Collaborative Innovation Center of Quantum Matter, Beijing, 100190, China

    KuiJuan Jin & GuoZhen Yang

  4. School of Science, Minzu University of China, Beijing, 100081, China

    QingQing Li & YuPing Yang

  5. Shanghai Synchrotron Radiation Facility (SSRF), Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai, 201204, China

    XiaoLong Li

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  1. Qian Wan
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Correspondence to KuiJuan Jin or HaiZhong Guo.

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Wan, Q., Jin, K., Li, Q. et al. Oxygen vacancies effects on phase diagram of epitaxial La1–x Sr x MnO3 thin films. Sci. China Phys. Mech. Astron. 60, 057711 (2017). https://doi.org/10.1007/s11433-017-9018-8

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  • DOI: https://doi.org/10.1007/s11433-017-9018-8

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