Influence of hot pressure on the magnetoresistance of CrO2

doi:10.1063/1.2714272

IMR OpenIR

	Influence of hot pressure on the magnetoresistance of CrO2
	Wang, Xianjie ; Sui, Yu ; Song, Xiudan ; Zhu, Ruibin ; Qian, Zhengnan ; Su, Wenhui ; Tang, Jinke
通讯作者	Sui, Yu(suiyu@hit.edu.cn)
	2007-05-01
发表期刊	JOURNAL OF APPLIED PHYSICS
ISSN	0021-8979
卷号	101 期号:9 页码:3
摘要	In this paper, we investigate the influence of high temperature and high pressure (hot pressure) on the magnetic and transport properties of polycrystalline CrO2 samples compacted under high pressure and high temperature of up to 5 GPa and 600 degrees C, respectively. The magnetic moment increases with compacting temperature, and a metal-semiconductor transition is observed in hot-pressed samples, different from the cold-pressed samples. These results indicate that the formation of Cr2O3 at the grain boundaries of CrO2 is suppressed by hot pressure. The magnitude of low field magnetoresistance of up to 1 T at 5 K is enhanced first with the increase of compacting temperature and then decreased under higher compacting temperature. This result can be well explained by the change of spin-dependent tunneling at the modulated grain boundaries of CrO2 due to the transformation from Cr2O3 to CrO2 under hot pressure. (c) 2007 American Institute of Physics.
DOI	10.1063/1.2714272
收录类别	SCI
语种	英语
WOS研究方向	Physics
WOS类目	Physics, Applied
WOS记录号	WOS:000246567900355
出版者	AMER INST PHYSICS
引用统计	被引频次：1[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/89225
专题	中国科学院金属研究所
通讯作者	Sui, Yu
作者单位	1.Harbin Inst Technol, Dept Phys, CCMST, Harbin 150001, Peoples R China 2.Chinese Acad Sci, Int Ctr Mat Phys, Shenyang 110016, Peoples R China 3.Univ New Orleans, Dept Phys, New Orleans, LA 70148 USA
推荐引用方式 GB/T 7714	Wang, Xianjie,Sui, Yu,Song, Xiudan,et al. Influence of hot pressure on the magnetoresistance of CrO2[J]. JOURNAL OF APPLIED PHYSICS,2007,101(9):3.
APA	Wang, Xianjie.,Sui, Yu.,Song, Xiudan.,Zhu, Ruibin.,Qian, Zhengnan.,...&Tang, Jinke.(2007).Influence of hot pressure on the magnetoresistance of CrO2.JOURNAL OF APPLIED PHYSICS,101(9),3.
MLA	Wang, Xianjie,et al."Influence of hot pressure on the magnetoresistance of CrO2".JOURNAL OF APPLIED PHYSICS 101.9(2007):3.