Oxygen vacancies controlled multiple magnetic phases in epitaxial single crystal Co0.5(Mg0.55Zn0.45)0.5O1-v thin films

Zhu, Dapeng; Cao, Qiang; Qiao, Ruimin; Zhu, Shimeng; Yang, Wanli; Xia, Weixing; Tian, Yufeng; Liu, Guolei; Yan, Shishen

doi:10.1038/srep24188

Title: Oxygen vacancies controlled multiple magnetic phases in epitaxial single crystal Co_0.5(Mg_0.55Zn_0.45)_0.5O_1-v thin films

Journal Article · Mon Apr 11 00:00:00 EDT 2016 · Scientific Reports

DOI:https://doi.org/10.1038/srep24188· OSTI ID:1379281

Zhu, Dapeng ^[1]; Cao, Qiang ^[1]; Qiao, Ruimin ^[2]; Zhu, Shimeng ^[3]; Yang, Wanli ^[2]; Xia, Weixing ^[3]; Tian, Yufeng ^[1]; Liu, Guolei ^[1]; Yan, Shishen ^[1]

Shandong Univ., Jinan (China). School of Physics, State Key lab. of Crystal Materials
Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States). Advanced Light Source
Chinese Academy of Sciences (CAS), Ningbo (China). Ningbo Inst. of Materials Technology and Engineering

High quality single-crystal fcc-Co _x (Mg _y Zn _1-y ) _1-x O _1-vepitaxial thin films with high Co concentration up to x = 0.5 have been fabricated by molecular beam epitaxy. Systematic magnetic property characterization and soft X-ray absorption spectroscopy analysis indicate that the coexistence of ferromagnetic regions, superparamagnetic clusters, and non-magnetic boundaries in the as-prepared Co _x (Mg _y Zn _1-y ) _1-x O _1-v films is a consequence of the intrinsic inhomogeneous distribution of oxygen vacancies. Furthermore, the relative strength of multiple phases could be modulated by controlling the oxygen partial pressure during sample preparation. Armed with both controllable magnetic properties and tunable band-gap, Co _x (Mg _y Zn _1-y ) _1-x O _1-v films may have promising applications in future spintronics.

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Research Organization:: Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States)

Sponsoring Organization:: USDOE Office of Science (SC), Basic Energy Sciences (BES)

Grant/Contract Number:: AC02-05CH11231

OSTI ID:: 1379281

Journal Information:: Scientific Reports, Vol. 6, Issue 1; ISSN 2045-2322

Publisher:: Nature Publishing GroupCopyright Statement

Country of Publication:: United States

Language:: English

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Cited by: 9 works

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Title: Oxygen vacancies controlled multiple magnetic phases in epitaxial single crystal Co0.5(Mg0.55Zn0.45)0.5O1-v thin films

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Title: Oxygen vacancies controlled multiple magnetic phases in epitaxial single crystal Co_0.5(Mg_0.55Zn_0.45)_0.5O_1-v thin films