Rock salt structure GdO epitaxial thin film with a high ferromagnetic Curie temperature

Taku Yamamoto; Kenichi Kaminaga; Daichi Saito; Daichi Oka; Tomoteru Fukumura

doi:10.1063/5.0017954

Rock salt structure GdO epitaxial thin film with a high ferromagnetic Curie temperature

Taku Yamamoto, Kenichi Kaminaga, Daichi Saito, Daichi Oka, Tomoteru Fukumura

Research output: Contribution to journal › Article › peer-review

Abstract

GdO with unusual valence of Gd2+ (4f75d1) has been known as the only gas phase so far. In this study, we report on the growth of solid phase rock salt structure GdO epitaxial thin films. The GdO thin film was an n-type semiconductor with the bandgap of 0.1 eV. The ferromagnetic Curie temperature (TC) was as high as 276 K, which was much higher than that of archetypal ferromagnetic rare earth monoxide EuO (TC = 69 K). TC increased slightly with electron doping similar to non-stoichiometric EuO1-δ, while decreased significantly with La doping probably caused by the magnetic dilution effect due to substitution of Gd with divalent La.

Original language	English
Article number	052402
Journal	Applied Physics Letters
Volume	117
Issue number	5
DOIs	https://doi.org/10.1063/5.0017954
Publication status	Published - 2020 Aug 3

ASJC Scopus subject areas

Physics and Astronomy (miscellaneous)

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title = "Rock salt structure GdO epitaxial thin film with a high ferromagnetic Curie temperature",

abstract = "GdO with unusual valence of Gd2+ (4f75d1) has been known as the only gas phase so far. In this study, we report on the growth of solid phase rock salt structure GdO epitaxial thin films. The GdO thin film was an n-type semiconductor with the bandgap of 0.1 eV. The ferromagnetic Curie temperature (TC) was as high as 276 K, which was much higher than that of archetypal ferromagnetic rare earth monoxide EuO (TC = 69 K). TC increased slightly with electron doping similar to non-stoichiometric EuO1-δ, while decreased significantly with La doping probably caused by the magnetic dilution effect due to substitution of Gd with divalent La.",

author = "Taku Yamamoto and Kenichi Kaminaga and Daichi Saito and Daichi Oka and Tomoteru Fukumura",

note = "Funding Information: We thank T. Nojima for technical assistance. This work was in part supported by JSPS KAKENHI (Nos. 26105002, 18H03872, 18K18935, and 19K15440) and the Mitsubishi Foundation. Publisher Copyright: {\textcopyright} 2020 Author(s).",

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doi = "10.1063/5.0017954",

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T1 - Rock salt structure GdO epitaxial thin film with a high ferromagnetic Curie temperature

AU - Yamamoto, Taku

AU - Kaminaga, Kenichi

AU - Saito, Daichi

AU - Oka, Daichi

AU - Fukumura, Tomoteru

N1 - Funding Information: We thank T. Nojima for technical assistance. This work was in part supported by JSPS KAKENHI (Nos. 26105002, 18H03872, 18K18935, and 19K15440) and the Mitsubishi Foundation. Publisher Copyright: © 2020 Author(s).

PY - 2020/8/3

Y1 - 2020/8/3

N2 - GdO with unusual valence of Gd2+ (4f75d1) has been known as the only gas phase so far. In this study, we report on the growth of solid phase rock salt structure GdO epitaxial thin films. The GdO thin film was an n-type semiconductor with the bandgap of 0.1 eV. The ferromagnetic Curie temperature (TC) was as high as 276 K, which was much higher than that of archetypal ferromagnetic rare earth monoxide EuO (TC = 69 K). TC increased slightly with electron doping similar to non-stoichiometric EuO1-δ, while decreased significantly with La doping probably caused by the magnetic dilution effect due to substitution of Gd with divalent La.

AB - GdO with unusual valence of Gd2+ (4f75d1) has been known as the only gas phase so far. In this study, we report on the growth of solid phase rock salt structure GdO epitaxial thin films. The GdO thin film was an n-type semiconductor with the bandgap of 0.1 eV. The ferromagnetic Curie temperature (TC) was as high as 276 K, which was much higher than that of archetypal ferromagnetic rare earth monoxide EuO (TC = 69 K). TC increased slightly with electron doping similar to non-stoichiometric EuO1-δ, while decreased significantly with La doping probably caused by the magnetic dilution effect due to substitution of Gd with divalent La.

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Rock salt structure GdO epitaxial thin film with a high ferromagnetic Curie temperature

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