Proximity induced room temperature ferromagnetism in graphene probed with spin currents

被引：154

作者：

Leutenantsmeyer, Johannes Christian ^{[1
]}

Kaverzin, Alexey A. ^{[1
]}

Wojtaszek, Magdalena ^{[1
]}

van Wees, Bart J. ^{[1
]}

机构：

[1] Univ Groningen, Phys Nanodevices, Zernike Inst Adv Mat, NL-9747 AG Groningen, Netherlands

来源：

2D MATERIALS | 2017年 / 4卷 / 01期

基金：

欧盟第七框架计划;

关键词：

graphene; proximity induced magnetization; spintronics; PRECESSION; TRANSPORT;

D O I：

10.1088/2053-1583/4/1/014001

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We present a direct measurement of the exchange interaction in room temperature ferromagnetic graphene. We study the spin transport in exfoliated graphene on an yttrium-iron-garnet substrate where the observed spin precession clearly indicates the presence and strength of an exchange field that is an unambiguous evidence of induced ferromagnetism. We describe the results with a modified Bloch diffusion equation and extract an average exchange field of the order of 0.2 T. Further, we demonstrate that a proximity induced 2D ferromagnet can efficiently modulate a spin current by controlling the direction of the exchange field. These findings can create a building block for magnetic-gate tuneable spin transport in one-atom-thick spintronic devices.

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页数：6

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