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政大典藏 > College of Science > Graduate Institute of Applied Physics > Periodical Articles > Item 140.119/61888

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Title:	High spin polarization of the anomalous Hall current in Co-based Heusler compounds
Authors:	郭光宇 Tung, Jen-Chuan
Contributors:	應物所
Date:	2013-03
Issue Date:	2013-11-27 16:09:06 (UTC+8)
Abstract:	Based on first principles density functional calculations of the intrinsic anomalous and spin Hall conductivities, we predict that the charge Hall current in Co-based full Heusler compounds Co2XZ (X = Cr and Mn; Z = Al, Si, Ga, Ge, In and Sn), except Co2CrGa, would be almost fully spin polarized, even though Co2MnAl, Co2MnGa, Co2MnIn and Co2MnSn do not have a half-metallic band structure. Furthermore, the ratio of the associated spin current to the charge Hall current is slightly larger than 1.0. This suggests that these Co-based Heusler compounds, especially Co2MnAl, Co2MnGa and Co2MnIn which are found to have large anomalous and spin Hall conductivities, might be called anomalous Hall half-metals and could have valuable applications in spintronics such as spin valves as well as magnetoresistive and spin-torque-driven nanodevices. These interesting findings are discussed in terms of the calculated electronic band structures, magnetic moments and also anomalous and spin Hall conductivities as a function of the Fermi level.
Relation:	New Journal of Physics, 15(3), 033014
Data Type:	article
DOI link:	http://dx.doi.org/10.1088/1367-2630/15/3/033014
DOI:	10.1088/1367-2630/15/3/033014
Appears in Collections:	[Graduate Institute of Applied Physics] Periodical Articles

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