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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

High quality single-crystal fcc-Co x (Mg y Zn 1-y ) 1-x O 1-v epitaxial 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.
 [1] ;  [1] ;  [2] ;  [3] ;  [2] ;  [3] ;  [1] ;  [1] ;  [1]
  1. Shandong Univ., Jinan (China). School of Physics, State Key lab. of Crystal Materials
  2. Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States). Advanced Light Source
  3. Chinese Academy of Sciences (CAS), Ningbo (China). Ningbo Inst. of Materials Technology and Engineering
Publication Date:
Grant/Contract Number:
Accepted Manuscript
Journal Name:
Scientific Reports
Additional Journal Information:
Journal Volume: 6; Journal Issue: 1; Journal ID: ISSN 2045-2322
Nature Publishing Group
Research Org:
Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
Sponsoring Org:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)
Country of Publication:
United States
36 MATERIALS SCIENCE; ferromagnetism; magnetic properties and materials
OSTI Identifier: