Magnon Contribution on Pure Spin Current Generation in Half-Metal

International Conference on Condensed Matters and Advanced Materials 2018

Cahaya, Adam B.^1 ; Majidi, M.A.^1

Department of Physics, Faculty of Mathematics, Natural Sciences Universitas Indonesia, Kampus UI Depok, Depok

16424, Indonesia^1

关键词: Collective dynamics;    Conduction electrons;    Current generation;    Half metals;    Metallic ferromagnets;    Spin currents;    Spin orientations;    Spin transport;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/515/1/012038/pdf
DOI  :  10.1088/1757-899X/515/1/012038

来源: IOP

【 摘 要 】

Half-metal is a class of the metallic ferromagnet having a 100% spin polarization. The conduction electrons of half-metals can only carry electrons with a particular spin orientation. Because of this, the current generation of half-metal is expected to be governed only by the particular conducting spin. However, the contribution of the opposite spin, on which the half-metal acts as an insulator, is often neglected. Here we theoretically study the contribution of this insulating spin on the spin transport in the half-metal, in comparison with the conducting spin. We found that the collective dynamic of the insulating spin is responsible for magnonic transport that in turns influence the spin current generation in the half-metal.