Large magnetoresistance in metamagnetic CoMnSi0.88Ge0.12 alloy

doi:10.1088/1674-1056/19/3/037501

中国物理B ›› 2010, Vol. 19 ›› Issue (3): 37501-037501.doi: 10.1088/1674-1056/19/3/037501

Large magnetoresistance in metamagnetic CoMnSi_0.88Ge_0.12 alloy

张成亮, 王敦辉, 曹庆琪, 轩海成, 马胜灿, 都有为

National Laboratory of Solid State Microstructures and Key Laboratory of Nanomaterials for Jiangsu Province, Nanjing University, Nanjing 210093, China

收稿日期:2009-07-24 修回日期:2009-08-14 出版日期:2010-03-15 发布日期:2010-03-15
基金资助:
Project supported by the State Key Program for Basic Research of China (Grant No. 2005CB623605), the National Natural Science Foundation of China (Grant Nos. 50701022 and 50831006) and the Program for New Century Excellent Talents of China (Grant No. NCET-08-0278).

Large magnetoresistance in metamagnetic CoMnSi_0.88Ge_0.12 alloy

Zhang Cheng-Liang(张成亮), Wang Dun-Hui(王敦辉)^†, Cao Qing-Qi(曹庆琪), Xuan Hai-Cheng(轩海成), Ma Sheng-Can(马胜灿), and Du You-Wei(都有为)

National Laboratory of Solid State Microstructures and Key Laboratory of Nanomaterials for Jiangsu Province, Nanjing University, Nanjing 210093, China

Received:2009-07-24 Revised:2009-08-14 Online:2010-03-15 Published:2010-03-15
Supported by:
Project supported by the State Key Program for Basic Research of China (Grant No. 2005CB623605), the National Natural Science Foundation of China (Grant Nos. 50701022 and 50831006) and the Program for New Century Excellent Talents of China (Grant No. NCET-08-0278).

摘要/Abstract

摘要： The magneto-transport properties are investigated in metamagnetic CoMnSi_0.88Ge_0.12 alloy. By applying a magnetic field or increasing temperature, a metamagnetic phase transition from antiferromagnetic to ferromagnetic is observed in this alloy. Around the metamagnetic phase transition, CoMnSi_0.88Ge_0.12 alloy exhibits a large and negative magnetoresistance effect (～ 32%) under a magnetic field of 20~kOe (1~Oe = 79.5775~A/m), which is ascribed to the spin-dependent scattering of conduction electrons.

Abstract: The magneto-transport properties are investigated in metamagnetic CoMnSi_0.88Ge_0.12 alloy. By applying a magnetic field or increasing temperature, a metamagnetic phase transition from antiferromagnetic to ferromagnetic is observed in this alloy. Around the metamagnetic phase transition, CoMnSi_0.88Ge_0.12 alloy exhibits a large and negative magnetoresistance effect (～ 32%) under a magnetic field of 20 kOe (1 Oe = 79.5775 A/m), which is ascribed to the spin-dependent scattering of conduction electrons.

Key words: metamagnetic, magnetoresistance

中图分类号: (Galvanomagnetic and other magnetotransport effects)

72.15.Gd

75.50.Ee (Antiferromagnetics) 75.50.Cc (Other ferromagnetic metals and alloys) 75.30.Kz (Magnetic phase boundaries (including classical and quantum magnetic transitions, metamagnetism, etc.)) 72.25.Rb (Spin relaxation and scattering) 72.15.Eb (Electrical and thermal conduction in crystalline metals and alloys)

张成亮, 王敦辉, 曹庆琪, 轩海成, 马胜灿, 都有为. Large magnetoresistance in metamagnetic CoMnSi_0.88Ge_0.12 alloy[J]. 中国物理B, 2010, 19(3): 37501-037501.

Zhang Cheng-Liang(张成亮), Wang Dun-Hui(王敦辉), Cao Qing-Qi(曹庆琪), Xuan Hai-Cheng(轩海成), Ma Sheng-Can(马胜灿), and Du You-Wei(都有为). Large magnetoresistance in metamagnetic CoMnSi_0.88Ge_0.12 alloy[J]. Chin. Phys. B, 2010, 19(3): 37501-037501.

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Large magnetoresistance in metamagnetic CoMnSi_0.88Ge_0.12 alloy

Large magnetoresistance in metamagnetic CoMnSi_0.88Ge_0.12 alloy

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