磁性
凝聚态物理
自旋电子学
氧气
材料科学
订单(交换)
自旋(空气动力学)
螺旋(铁路)
铁磁性
物理
量子力学
财务
数学
热力学
数学分析
经济
作者
Jiaren Yuan,Xin Yan,Y. Xiao,Yan-Dong Guo,Cong Dai
出处
期刊:Nanotechnology
[IOP Publishing]
日期:2016-10-24
卷期号:27 (47): 475202-475202
被引量:2
标识
DOI:10.1088/0957-4484/27/47/475202
摘要
Motivated by recent measurement of the magnetism and conductance of the oxygen-assisted Pt nanojunctions, we performed first principle calculations of the magnetic order and electronic transport by explicitly including fully relativistic effects. Our results show that the spin alignment is a cycloidal spiral feature attributed to the Dzyaloshinskii-Moriya interaction, which indicates that the observed magnetism in experiments is of noncollinear nature. The oxygen concentration is the responsible for the switching of the rotational sense of the spiral magnetic order found in oxygen-assisted Pt nanojunctions. Furthermore, the magnetic moments and magnetoresistances vary with oxygen concentration in the chain, which can be used to tune the magnetism and magnetotransport. The oxygen-assisted Pt nanojunctions offer a possibility for spintronic applications in magnetic memory and quantum devices.
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