Room-temperature ferromagnetism in carbon- and nitrogen-doped rutile TiO2

Jia Bin Wang; Kuei Ching Wu; Jyun Wei Mi; Chih Wei Luo; Kaung Hsiung Wu; Tzeng Ming Uen; Jiunn Yuan Lin; Jenh Yih Juang; Shiu-Jen Liu

doi:10.1007/s00339-014-8788-2

Room-temperature ferromagnetism in carbon- and nitrogen-doped rutile TiO₂

Jia Bin Wang, Kuei Ching Wu, Jyun Wei Mi, Chih Wei Luo, Kaung Hsiung Wu, Tzeng Ming Uen, Jiunn Yuan Lin, Jenh Yih Juang, Shiu-Jen Liu

Department of Physics

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

9 Citations (Scopus)

Abstract

Marked room-temperature ferromagnetism (RTFM) was obtained in carbon- and nitrogen-doped rutile (Formula presented.) powders. X-ray photoelectron spectroscopy measurements revealed the co-existence of considerable densities of states near the Fermi level ((Formula presented.)) and oxygen vacancies primarily induced by C- and N-doping. Density functional theory calculations showed that the local moments responsible for the observed RTFM in N-doped (Formula presented.) were primarily attributed to the partially populated, spin-polarized Ti (Formula presented.) band. In addition to the unfilled Ti (Formula presented.) band, the spin splitting in C (Formula presented.)states near (Formula presented.) in C-doped (Formula presented.), which may be induced by the (Formula presented.) interaction between the C impurities and neighboring oxygen ions, results in Stoner band-splitting-type ferromagnetism.

Original language	English
Pages (from-to)	725-731
Number of pages	7
Journal	Applied Physics A: Materials Science and Processing
Volume	118
Issue number	2
DOIs	https://doi.org/10.1007/s00339-014-8788-2
Publication status	Published - 2014 Feb

ASJC Scopus subject areas

Chemistry(all)
Materials Science(all)

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Room-temperature ferromagnetism in carbon- and nitrogen-doped rutile TiO₂ . / Wang, Jia Bin; Wu, Kuei Ching; Mi, Jyun Wei; Luo, Chih Wei; Wu, Kaung Hsiung; Uen, Tzeng Ming; Lin, Jiunn Yuan; Juang, Jenh Yih; Liu, Shiu-Jen.

In: Applied Physics A: Materials Science and Processing, Vol. 118, No. 2, 02.2014, p. 725-731.

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

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title = "Room-temperature ferromagnetism in carbon- and nitrogen-doped rutile TiO2 ",

abstract = "Marked room-temperature ferromagnetism (RTFM) was obtained in carbon- and nitrogen-doped rutile (Formula presented.) powders. X-ray photoelectron spectroscopy measurements revealed the co-existence of considerable densities of states near the Fermi level ((Formula presented.)) and oxygen vacancies primarily induced by C- and N-doping. Density functional theory calculations showed that the local moments responsible for the observed RTFM in N-doped (Formula presented.) were primarily attributed to the partially populated, spin-polarized Ti (Formula presented.) band. In addition to the unfilled Ti (Formula presented.) band, the spin splitting in C (Formula presented.)states near (Formula presented.) in C-doped (Formula presented.), which may be induced by the (Formula presented.) interaction between the C impurities and neighboring oxygen ions, results in Stoner band-splitting-type ferromagnetism.",

author = "Wang, {Jia Bin} and Wu, {Kuei Ching} and Mi, {Jyun Wei} and Luo, {Chih Wei} and Wu, {Kaung Hsiung} and Uen, {Tzeng Ming} and Lin, {Jiunn Yuan} and Juang, {Jenh Yih} and Shiu-Jen Liu",

note = "Funding Information: This work was supported in part by the National Science Council of Taiwan, Republic of China under the Grant Nos. NSC98-2112-M-009-004-MY3, 101-2112-M-003-007, and MOE-ATP program operated at NCTU, Taiwan. The XPS measurements were performed at instruments center of National Chung Cheng University, Taiwan. We gratefully acknowledge the insightful comments from the members of the Solid State Laboratory at NCTU. Publisher Copyright: {\textcopyright} 2014, Springer-Verlag Berlin Heidelberg.",

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doi = "10.1007/s00339-014-8788-2",

language = "English",

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AU - Wang, Jia Bin

AU - Wu, Kuei Ching

AU - Mi, Jyun Wei

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AU - Wu, Kaung Hsiung

AU - Uen, Tzeng Ming

AU - Lin, Jiunn Yuan

AU - Juang, Jenh Yih

AU - Liu, Shiu-Jen

N1 - Funding Information: This work was supported in part by the National Science Council of Taiwan, Republic of China under the Grant Nos. NSC98-2112-M-009-004-MY3, 101-2112-M-003-007, and MOE-ATP program operated at NCTU, Taiwan. The XPS measurements were performed at instruments center of National Chung Cheng University, Taiwan. We gratefully acknowledge the insightful comments from the members of the Solid State Laboratory at NCTU. Publisher Copyright: © 2014, Springer-Verlag Berlin Heidelberg.

PY - 2014/2

Y1 - 2014/2

N2 - Marked room-temperature ferromagnetism (RTFM) was obtained in carbon- and nitrogen-doped rutile (Formula presented.) powders. X-ray photoelectron spectroscopy measurements revealed the co-existence of considerable densities of states near the Fermi level ((Formula presented.)) and oxygen vacancies primarily induced by C- and N-doping. Density functional theory calculations showed that the local moments responsible for the observed RTFM in N-doped (Formula presented.) were primarily attributed to the partially populated, spin-polarized Ti (Formula presented.) band. In addition to the unfilled Ti (Formula presented.) band, the spin splitting in C (Formula presented.)states near (Formula presented.) in C-doped (Formula presented.), which may be induced by the (Formula presented.) interaction between the C impurities and neighboring oxygen ions, results in Stoner band-splitting-type ferromagnetism.

AB - Marked room-temperature ferromagnetism (RTFM) was obtained in carbon- and nitrogen-doped rutile (Formula presented.) powders. X-ray photoelectron spectroscopy measurements revealed the co-existence of considerable densities of states near the Fermi level ((Formula presented.)) and oxygen vacancies primarily induced by C- and N-doping. Density functional theory calculations showed that the local moments responsible for the observed RTFM in N-doped (Formula presented.) were primarily attributed to the partially populated, spin-polarized Ti (Formula presented.) band. In addition to the unfilled Ti (Formula presented.) band, the spin splitting in C (Formula presented.)states near (Formula presented.) in C-doped (Formula presented.), which may be induced by the (Formula presented.) interaction between the C impurities and neighboring oxygen ions, results in Stoner band-splitting-type ferromagnetism.

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Room-temperature ferromagnetism in carbon- and nitrogen-doped rutile TiO₂

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