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Manipulation of Magnetic Properties by Oxygen Vacancies in Multiferroic YMnO 3
Author(s) -
Cheng Shaobo,
Li Menglei,
Deng Shiqing,
Bao Shanyong,
Tang Peizhe,
Duan Wenhui,
Ma Jing,
Nan Cewen,
Zhu Jing
Publication year - 2016
Publication title -
advanced functional materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 6.069
H-Index - 322
eISSN - 1616-3028
pISSN - 1616-301X
DOI - 10.1002/adfm.201505031
Subject(s) - multiferroics , materials science , ferroelectricity , ferromagnetism , condensed matter physics , magnetization , ferromagnetic material properties , magnetic field , optoelectronics , physics , quantum mechanics , dielectric
Generating a single material with multiple ferroic properties has been the hotspot of research interest for decades. The existing studies mostly focus on the intrinsic properties of multiferroic materials, overlooking the importance of the widely distributed defects in the materials. Here, the strong influence of oxygen vacancies ( V O ) on the magnetic properties of YMnO 3 is demonstrated. The first‐principles calculations reveal that the V O at axial positions can induce a nonzero net magnetization along the c ‐axis. By structural characterization and magnetic measurement, this theoretically predicted ferromagnetic property is experimentally confirmed in the YMnO 3 film grown on a c ‐Al 2 O 3 substrate. The large in‐plane compressive strain provided by the Al 2 O 3 substrate allows to create the axial V O of YMnO 3 film in this system. The ferroelectricity of YMnO 3 is also preserved even under large in‐plane compressive strain. Therefore, the coexistence of the ferroelectric and ferromagnetic properties can be realized in the YMnO 3 film, which is of practical interest for technological applications.