Structural characteristic and magnetic properties of Mn oxide films grown by plasma-assisted MBE

L. W. Guo, H. Makino, H. J. Ko, Y. F. Chen, Takashi Hanada, D. L. Peng, K. Inaba, T. Yao

Research output: Contribution to journalConference articlepeer-review

17 Citations (Scopus)

Abstract

We report on the structural characteristics and magnetic properties of Mn oxide films grown on MgO (0 0 1) substrates by plasma-assisted molecular beam epitaxy (MBE). Under well-controlled growth conditions, three types of Mn oxide films were obtained. They are Mn3O4, λ-MnO2 and their mixed structure (Mn3O4 + λ-MnO2). A structural phase diagram about the films is depicted as a function of growth rate and substrate temperature. It is found that at lower growth rate, a new phase of Mn oxide λ-MnO2 was obtained, and two transition temperatures were observed in its magnetization. At a higher growth rate, the Mn3O4 film was obtained. Its coercive force and transition temperature were different from its bulk sample. The atomic force microscopy (AFM) images exhibited the surfaces of the three films are composed of pyramids, flat surfaces and truncated-pyramids, respectively.

Original languageEnglish
Pages (from-to)955-959
Number of pages5
JournalJournal of Crystal Growth
Volume227-228
DOIs
Publication statusPublished - 2001 Jul 1
Event11th International Conference on Molecular Beam Epitaxy - Bijing, China
Duration: 2000 Sep 112000 Sep 15

Keywords

  • A1. Crystal morphology
  • A3. Molecular beam epitaxy
  • B1. Oxides
  • B2. Magnetic materials

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Inorganic Chemistry
  • Materials Chemistry

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