Metal-insulator transition temperature in EuO1−x films as a function of exposure time in air

Shrestha, Narendra; Tang, Jinke

doi:10.1016/j.jmmm.2021.168964

Metal-insulator transition temperature in EuO_1−x films as a function of exposure time in air

Journal Article · Sat Dec 18 04:00:00 EST 2021 · Journal of Magnetism and Magnetic Materials

DOI:https://doi.org/10.1016/j.jmmm.2021.168964· OSTI ID:1977334

Shrestha, Narendra ^[1]; Tang, Jinke ^[2]

University of Wyoming, Laramie, WY (United States); OSTI
University of Wyoming, Laramie, WY (United States)

Oxygen-deficient Europium monoxide EuO_1-x shows a metal-to-insulator transition near the Curie temperature (T_C). A systematic transport study of EuO_1-x thin films as a function of exposure time in air reveals a gradually decreased T_C from 140 K to 70 K as the concentration of the oxygen vacancies decreases, which is accompanied by a drastic increase in the resistance. Here we also find an unusual enhancement of magnetic anisotropy in the transport measurements, which results from the strong spin-orbit coupling at the interface between the film and substrate and possible presence of spin-textures like skyrmions in EuO_1-x.

View Accepted Manuscript (DOE)

Research Organization:: University of Wyoming, Laramie, WY (United States)

Sponsoring Organization:: USDOE Office of Science (SC), Basic Energy Sciences (BES). Materials Sciences & Engineering Division (MSE); National Science Foundation (NSF)

Grant/Contract Number:: SC0020074

OSTI ID:: 1977334

Alternate ID(s):: OSTI ID: 2335338
OSTI ID: 1837455

Journal Information:: Journal of Magnetism and Magnetic Materials, Journal Name: Journal of Magnetism and Magnetic Materials Journal Issue: C Vol. 547; ISSN 0304-8853

Publisher:: ElsevierCopyright Statement

Country of Publication:: United States

Language:: English

References (17)

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71 CLASSICAL AND QUANTUM MECHANICS
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exchange-split conduction band
magnetic anisotropy
magnetic polaron
skyrmions
spin-orbit coupling
topological hall effect

Metal-insulator transition temperature in EuO1−x films as a function of exposure time in air

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Metal-insulator transition temperature in EuO_1−x films as a function of exposure time in air