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Influence of hot pressure on the magnetoresistance of CrO2
Wang, Xianjie; Sui, Yu; Song, Xiudan; Zhu, Ruibin; Qian, Zhengnan; Su, Wenhui; Tang, Jinke
Corresponding AuthorSui, Yu(suiyu@hit.edu.cn)
2007-05-01
Source PublicationJOURNAL OF APPLIED PHYSICS
ISSN0021-8979
Volume101Issue:9Pages:3
AbstractIn 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.
DOI10.1063/1.2714272
Indexed BySCI
Language英语
WOS Research AreaPhysics
WOS SubjectPhysics, Applied
WOS IDWOS:000246567900355
PublisherAMER INST PHYSICS
Citation statistics
Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/89225
Collection中国科学院金属研究所
Corresponding AuthorSui, Yu
Affiliation1.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
Recommended Citation
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.
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