Electron carrier-mediated room temperature ferromagnetism in anatase (ti,co) o 2

Tomoteru Fukumura; Yoshinori Yamada; Kazunori Ueno; Hongtao Yuan; Hidekazu Shimotani; Yoshihiro Iwasa; L. I.N. Gu; Susumu Tsukimoto; Yuichi Ikuhara; Masashi Kawasaki

doi:10.1142/S2010324712300058

Electron carrier-mediated room temperature ferromagnetism in anatase (ti,co) o ₂

Tomoteru Fukumura, Yoshinori Yamada, Kazunori Ueno, Hongtao Yuan, Hidekazu Shimotani, Yoshihiro Iwasa, L. I.N. Gu, Susumu Tsukimoto, Yuichi Ikuhara, Masashi Kawasaki

SCI - Physics

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

6 Citations (Scopus)

Abstract

Since the discovery of room temperature ferromagnetism in (Ti,Co)O₂, the mechanism has been under discussion for a decade. Particularly, the central concern has been whether or not the ferromagnetic exchange interaction is mediated by charge carriers like (Ga,Mn)As. Recent two studies on the control of ferromagnetism in anatase (Ti,Co)O₂ at room temperature via electric field effect [Y. Yamada et al., Science332, 1065 (2011)] and chemical doping [Y. Yamada et al., Appl. Phys. Lett.99, 242502 (2011)] indicate a principal role of electrons in the carrier-mediated exchange interaction. In this article, the authors review fundamental properties of anatase (Ti,Co)O₂ and discuss the carrier mediated ferromagnetism.

Original language	English
Article number	1230005
Journal	SPIN
Volume	2
Issue number	4
DOIs	https://doi.org/10.1142/S2010324712300058
Publication status	Published - 2012 Dec 1

Keywords

Co-doped TiO
Ferromagnetic semiconductor
carrier-mediated ferromagnetism
electric field effect
room temperature ferromagnetism

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Atomic and Molecular Physics, and Optics
Electrical and Electronic Engineering

Access to Document

10.1142/S2010324712300058

Cite this

@article{ee439e2a722c43218077844a35260aff,

title = "Electron carrier-mediated room temperature ferromagnetism in anatase (ti,co) o 2",

abstract = "Since the discovery of room temperature ferromagnetism in (Ti,Co)O2, the mechanism has been under discussion for a decade. Particularly, the central concern has been whether or not the ferromagnetic exchange interaction is mediated by charge carriers like (Ga,Mn)As. Recent two studies on the control of ferromagnetism in anatase (Ti,Co)O2 at room temperature via electric field effect [Y. Yamada et al., Science332, 1065 (2011)] and chemical doping [Y. Yamada et al., Appl. Phys. Lett.99, 242502 (2011)] indicate a principal role of electrons in the carrier-mediated exchange interaction. In this article, the authors review fundamental properties of anatase (Ti,Co)O2 and discuss the carrier mediated ferromagnetism.",

keywords = "Co-doped TiO, Ferromagnetic semiconductor, carrier-mediated ferromagnetism, electric field effect, room temperature ferromagnetism",

author = "Tomoteru Fukumura and Yoshinori Yamada and Kazunori Ueno and Hongtao Yuan and Hidekazu Shimotani and Yoshihiro Iwasa and Gu, {L. I.N.} and Susumu Tsukimoto and Yuichi Ikuhara and Masashi Kawasaki",

note = "Funding Information: This work was supported in part by JSPS through NEXT Program initiated by CSTP, JST-PRESTO, and MEXT-KAKENHI. Publisher Copyright: {\textcopyright} 2012 World Scientific Publishing Company.",

year = "2012",

month = dec,

day = "1",

doi = "10.1142/S2010324712300058",

language = "English",

volume = "2",

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T1 - Electron carrier-mediated room temperature ferromagnetism in anatase (ti,co) o 2

AU - Fukumura, Tomoteru

AU - Yamada, Yoshinori

AU - Ueno, Kazunori

AU - Yuan, Hongtao

AU - Shimotani, Hidekazu

AU - Iwasa, Yoshihiro

AU - Gu, L. I.N.

AU - Tsukimoto, Susumu

AU - Ikuhara, Yuichi

AU - Kawasaki, Masashi

PY - 2012/12/1

Y1 - 2012/12/1

N2 - Since the discovery of room temperature ferromagnetism in (Ti,Co)O2, the mechanism has been under discussion for a decade. Particularly, the central concern has been whether or not the ferromagnetic exchange interaction is mediated by charge carriers like (Ga,Mn)As. Recent two studies on the control of ferromagnetism in anatase (Ti,Co)O2 at room temperature via electric field effect [Y. Yamada et al., Science332, 1065 (2011)] and chemical doping [Y. Yamada et al., Appl. Phys. Lett.99, 242502 (2011)] indicate a principal role of electrons in the carrier-mediated exchange interaction. In this article, the authors review fundamental properties of anatase (Ti,Co)O2 and discuss the carrier mediated ferromagnetism.

AB - Since the discovery of room temperature ferromagnetism in (Ti,Co)O2, the mechanism has been under discussion for a decade. Particularly, the central concern has been whether or not the ferromagnetic exchange interaction is mediated by charge carriers like (Ga,Mn)As. Recent two studies on the control of ferromagnetism in anatase (Ti,Co)O2 at room temperature via electric field effect [Y. Yamada et al., Science332, 1065 (2011)] and chemical doping [Y. Yamada et al., Appl. Phys. Lett.99, 242502 (2011)] indicate a principal role of electrons in the carrier-mediated exchange interaction. In this article, the authors review fundamental properties of anatase (Ti,Co)O2 and discuss the carrier mediated ferromagnetism.

KW - Co-doped TiO

KW - Ferromagnetic semiconductor

KW - carrier-mediated ferromagnetism

KW - electric field effect

KW - room temperature ferromagnetism

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