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	Rise and fall of ferromagnetism in o-irradiated al2o3 single crystals
	Li, Qiang1,2; Xu, Juping1; Liu, Jiandang1; Du, Huaijiang1; Ye, Bangjiao1
刊名	Journal of applied physics
	2015-06-21
卷号	117期号:23页码:5
ISSN号	0021-8979
DOI	10.1063/1.4922788
英文摘要	In dilute magnetic semiconductors studies, sapphire was usually used as non-magnetic substrate for films. we observed weak ferromagnetic component in al2o3 single crystal substrate, and excluded the possibility of ferromagnetic contaminations carefully by inductively coupled plasma mass spectrometry and x-ray photoelectron spectroscopy. the ferromagnetism rise and fall during the process of annealing-oxygen irradiation-annealing of the sapphire. the ferromagnetic changes are consistent with al-vacancy related defects detected by positron annihilation spectroscopy. with first-principle calculations, we confirm that al-vacancy can introduce magnetic moment for 3 mu b in al2o3 crystal and form stable v-al-v-al ferromagnetic coupling at room temperature. (c) 2015 aip publishing llc.
语种	英语
出版者	AMER INST PHYSICS
WOS记录号	WOS:000356619300009
内容类型	期刊论文
URI标识	http://www.corc.org.cn/handle/1471x/1639617
专题	高能物理研究所
通讯作者	Li, Qiang
作者单位	1.Univ Sci & Technol China, State Key Lab Particle Detect & Elect, Hefei 230026, Peoples R China 2.Chinese Acad Sci, Inst High Energy Phys, China Spallat Neutron Source, Dongguan 523803, Peoples R China
推荐引用方式 GB/T 7714	Li, Qiang,Xu, Juping,Liu, Jiandang,et al. Rise and fall of ferromagnetism in o-irradiated al2o3 single crystals[J]. Journal of applied physics,2015,117(23):5.
APA	Li, Qiang,Xu, Juping,Liu, Jiandang,Du, Huaijiang,&Ye, Bangjiao.(2015).Rise and fall of ferromagnetism in o-irradiated al2o3 single crystals.Journal of applied physics,117(23),5.
MLA	Li, Qiang,et al."Rise and fall of ferromagnetism in o-irradiated al2o3 single crystals".Journal of applied physics 117.23(2015):5.

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