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Evolution and control of the phase competition morphology in a manganite film

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  • Haibiao Zhou

    (High Magnetic Field Laboratory, Chinese Academy of Sciences and University of Science and Technology of China
    Hefei National Laboratory for Physical Sciences at Microscale, University of Science and Technology of China)

  • Lingfei Wang

    (Hefei National Laboratory for Physical Sciences at Microscale, University of Science and Technology of China)

  • Yubin Hou

    (High Magnetic Field Laboratory, Chinese Academy of Sciences and University of Science and Technology of China)

  • Zhen Huang

    (Hefei National Laboratory for Physical Sciences at Microscale, University of Science and Technology of China)

  • Qingyou Lu

    (High Magnetic Field Laboratory, Chinese Academy of Sciences and University of Science and Technology of China
    Hefei National Laboratory for Physical Sciences at Microscale, University of Science and Technology of China
    Collaborative Innovation Center of Advanced Microstructure, Nanjing University)

  • Wenbin Wu

    (High Magnetic Field Laboratory, Chinese Academy of Sciences and University of Science and Technology of China
    Hefei National Laboratory for Physical Sciences at Microscale, University of Science and Technology of China
    Collaborative Innovation Center of Advanced Microstructure, Nanjing University)

Abstract

The competition among different phases in perovskite manganites is pronounced since their energies are very close under the interplay of charge, spin, orbital and lattice degrees of freedom. To reveal the roles of underlying interactions, many efforts have been devoted towards directly imaging phase transitions at microscopic scales. Here we show images of the charge-ordered insulator (COI) phase transition from a pure ferromagnetic metal with reducing field or increasing temperature in a strained phase-separated manganite film, using a home-built magnetic force microscope. Compared with the COI melting transition, this reverse transition is sharp, cooperative and martensitic-like with astonishingly unique yet diverse morphologies. The COI domains show variable-dimensional growth at different temperatures and their distribution can illustrate the delicate balance of the underlying interactions in manganites. Our findings also display how phase domain engineering is possible and how the phase competition can be tuned in a controllable manner.

Suggested Citation

  • Haibiao Zhou & Lingfei Wang & Yubin Hou & Zhen Huang & Qingyou Lu & Wenbin Wu, 2015. "Evolution and control of the phase competition morphology in a manganite film," Nature Communications, Nature, vol. 6(1), pages 1-7, December.
    • Handle: RePEc:nat:natcom:v:6:y:2015:i:1:d:10.1038_ncomms9980
    DOI: 10.1038/ncomms9980
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