Role of structural defects on ferromagnetism in amorphous Cr-doped TiO 2 films

Y. X. Wang; Hui Liu; Z. Q. Li; X. X. Zhang; R. K. Zheng; S. P. Ringer

doi:10.1063/1.2240139

Role of structural defects on ferromagnetism in amorphous Cr-doped TiO ₂ films

Y. X. Wang, Hui Liu^*, Z. Q. Li, X. X. Zhang, R. K. Zheng, S. P. Ringer

^*Corresponding author for this work

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

62 Scopus citations

Abstract

Amorphous Cr_xTi_1-xO₂ films with different Cr concentrations of 0 ≤ x ≤ 0.16 were prepared by cosputtering method at room temperature. All as-deposited samples show hysteresis behavior from 2 to 340 K and the Curie temperatures are well above 390 K. The saturation magnetization is about 3.21 × 10^-1μ_B/Cr for x=0.05 at 340 K and decreases with increasing Cr dopant. After annealing at temperature above 300°C, the films crystallized into anatase structure and lost their ferromagnetic property. The results indicate that the ferromagnetism in amorphous Cr-doped TiO₂ films is intrinsic and the structural defects play an important role in the ferromagnetism of Cr:TiO₂ system.

Original language	English (US)
Article number	042511
Journal	Applied Physics Letters
Volume	89
Issue number	4
DOIs	https://doi.org/10.1063/1.2240139
State	Published - 2006
Externally published	Yes

ASJC Scopus subject areas

Physics and Astronomy (miscellaneous)

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@article{202e369ea38e413d8dbec2a4538f1dc3,

title = "Role of structural defects on ferromagnetism in amorphous Cr-doped TiO 2 films",

abstract = "Amorphous CrxTi1-xO2 films with different Cr concentrations of 0 ≤ x ≤ 0.16 were prepared by cosputtering method at room temperature. All as-deposited samples show hysteresis behavior from 2 to 340 K and the Curie temperatures are well above 390 K. The saturation magnetization is about 3.21 × 10-1μB/Cr for x=0.05 at 340 K and decreases with increasing Cr dopant. After annealing at temperature above 300°C, the films crystallized into anatase structure and lost their ferromagnetic property. The results indicate that the ferromagnetism in amorphous Cr-doped TiO2 films is intrinsic and the structural defects play an important role in the ferromagnetism of Cr:TiO2 system.",

author = "Wang, {Y. X.} and Hui Liu and Li, {Z. Q.} and Zhang, {X. X.} and Zheng, {R. K.} and Ringer, {S. P.}",

year = "2006",

doi = "10.1063/1.2240139",

language = "English (US)",

volume = "89",

journal = "Applied Physics Letters",

issn = "0003-6951",

publisher = "AMER INST PHYSICS",

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TY - JOUR

T1 - Role of structural defects on ferromagnetism in amorphous Cr-doped TiO 2 films

AU - Wang, Y. X.

AU - Liu, Hui

AU - Li, Z. Q.

AU - Zhang, X. X.

AU - Zheng, R. K.

AU - Ringer, S. P.

PY - 2006

Y1 - 2006

N2 - Amorphous CrxTi1-xO2 films with different Cr concentrations of 0 ≤ x ≤ 0.16 were prepared by cosputtering method at room temperature. All as-deposited samples show hysteresis behavior from 2 to 340 K and the Curie temperatures are well above 390 K. The saturation magnetization is about 3.21 × 10-1μB/Cr for x=0.05 at 340 K and decreases with increasing Cr dopant. After annealing at temperature above 300°C, the films crystallized into anatase structure and lost their ferromagnetic property. The results indicate that the ferromagnetism in amorphous Cr-doped TiO2 films is intrinsic and the structural defects play an important role in the ferromagnetism of Cr:TiO2 system.

AB - Amorphous CrxTi1-xO2 films with different Cr concentrations of 0 ≤ x ≤ 0.16 were prepared by cosputtering method at room temperature. All as-deposited samples show hysteresis behavior from 2 to 340 K and the Curie temperatures are well above 390 K. The saturation magnetization is about 3.21 × 10-1μB/Cr for x=0.05 at 340 K and decreases with increasing Cr dopant. After annealing at temperature above 300°C, the films crystallized into anatase structure and lost their ferromagnetic property. The results indicate that the ferromagnetism in amorphous Cr-doped TiO2 films is intrinsic and the structural defects play an important role in the ferromagnetism of Cr:TiO2 system.

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U2 - 10.1063/1.2240139

DO - 10.1063/1.2240139

M3 - Article

AN - SCOPUS:33746649180

SN - 0003-6951

VL - 89

JO - Applied Physics Letters

JF - Applied Physics Letters

IS - 4

M1 - 042511

ER -

Role of structural defects on ferromagnetism in amorphous Cr-doped TiO ₂ films

Abstract

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