Ferromagnetism at room temperature in Cr-doped anodic titanium dioxide nanotubes
Abstract
This study reports the room-temperature ferromagnetism in Cr-doped TiO{sub 2} nanotubes (NTs) synthesized via the electrochemical method followed by a novel Cr-doping process. Scanning electron microscopy and transmission electron microscopy showed that the TiO{sub 2} NTs were highly ordered with length up to 26 μm, outer diameter about 110 nm, and inner diameter about 100 nm. X-ray diffraction results indicated there were no magnetic contaminations of metallic Cr clusters or any other phases except anatase TiO{sub 2}. The Cr-doped TiO{sub 2} NTs were further annealed in oxygen, air and argon, and room-temperature ferromagnetism was observed in all Cr-doped samples. Moreover, saturation magnetizations and coercivities of the Cr-doped under various annealing atmosphere were further analyzed, and results indicate that oxygen content played a critical role in the room-temperature ferromagnetism.
- Authors:
-
- State Key Laboratory of Electronic Thin Film and Integrated Devices, University of Electronic Science and Technology, Chengdu 610054 (China)
- School of Technical Physics, Xidian University, Xi'an 710071 (China)
- Publication Date:
- OSTI Identifier:
- 22273962
- Resource Type:
- Journal Article
- Journal Name:
- Journal of Applied Physics
- Additional Journal Information:
- Journal Volume: 115; Journal Issue: 17; Conference: 55. annual conference on magnetism and magnetic materials, Atlanta, GA (United States), 14-18 Nov 2010; Other Information: (c) 2014 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 0021-8979
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; 77 NANOSCIENCE AND NANOTECHNOLOGY; ANNEALING; ARGON; COERCIVE FORCE; DOPED MATERIALS; FERROMAGNETISM; MAGNETIZATION; NANOTUBES; OXYGEN; SCANNING ELECTRON MICROSCOPY; TEMPERATURE RANGE 0273-0400 K; TITANIUM OXIDES; TRANSMISSION ELECTRON MICROSCOPY; X-RAY DIFFRACTION
Citation Formats
Liao, Yulong, Zhang, Huaiwu, Li, Jie, Yu, Guoliang, Zhong, Zhiyong, Bai, Feiming, Jia, Lijun, Zhang, Shihong, and Zhong, Peng. Ferromagnetism at room temperature in Cr-doped anodic titanium dioxide nanotubes. United States: N. p., 2014.
Web. doi:10.1063/1.4867225.
Liao, Yulong, Zhang, Huaiwu, Li, Jie, Yu, Guoliang, Zhong, Zhiyong, Bai, Feiming, Jia, Lijun, Zhang, Shihong, & Zhong, Peng. Ferromagnetism at room temperature in Cr-doped anodic titanium dioxide nanotubes. United States. https://doi.org/10.1063/1.4867225
Liao, Yulong, Zhang, Huaiwu, Li, Jie, Yu, Guoliang, Zhong, Zhiyong, Bai, Feiming, Jia, Lijun, Zhang, Shihong, and Zhong, Peng. 2014.
"Ferromagnetism at room temperature in Cr-doped anodic titanium dioxide nanotubes". United States. https://doi.org/10.1063/1.4867225.
@article{osti_22273962,
title = {Ferromagnetism at room temperature in Cr-doped anodic titanium dioxide nanotubes},
author = {Liao, Yulong and Zhang, Huaiwu and Li, Jie and Yu, Guoliang and Zhong, Zhiyong and Bai, Feiming and Jia, Lijun and Zhang, Shihong and Zhong, Peng},
abstractNote = {This study reports the room-temperature ferromagnetism in Cr-doped TiO{sub 2} nanotubes (NTs) synthesized via the electrochemical method followed by a novel Cr-doping process. Scanning electron microscopy and transmission electron microscopy showed that the TiO{sub 2} NTs were highly ordered with length up to 26 μm, outer diameter about 110 nm, and inner diameter about 100 nm. X-ray diffraction results indicated there were no magnetic contaminations of metallic Cr clusters or any other phases except anatase TiO{sub 2}. The Cr-doped TiO{sub 2} NTs were further annealed in oxygen, air and argon, and room-temperature ferromagnetism was observed in all Cr-doped samples. Moreover, saturation magnetizations and coercivities of the Cr-doped under various annealing atmosphere were further analyzed, and results indicate that oxygen content played a critical role in the room-temperature ferromagnetism.},
doi = {10.1063/1.4867225},
url = {https://www.osti.gov/biblio/22273962},
journal = {Journal of Applied Physics},
issn = {0021-8979},
number = 17,
volume = 115,
place = {United States},
year = {Wed May 07 00:00:00 EDT 2014},
month = {Wed May 07 00:00:00 EDT 2014}
}