Spin Relaxation in Weak Localization Regime in Multilayer Graphene Spin Valves

Takehiro Yamaguchi; Rai Moriya; Satoru Masubuchi; Kazuyuki Iguchi; Tomoki Machida

doi:10.7567/JJAP.52.040205

Spin Relaxation in Weak Localization Regime in Multilayer Graphene Spin Valves

Mesoscale and Nanoscale Physics 2013-04-01 v1

Authors: Takehiro Yamaguchi , Rai Moriya , Satoru Masubuchi , Kazuyuki Iguchi , Tomoki Machida

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Abstract

The temperature dependence of the spin relaxation time in multilayer graphene (MLG) spin valve devices was measured using a non-local magnetoresistance (NLMR) measurement. A weak localization (WL) was observed from magnetoresistance (MR) measurements below 70 K, suggesting coherent transport of the charge carriers. Within the same temperature range, we observed a large increase in the spin relaxation time and spin diffusion length even though the diffusion constant Ds was suppressed by the WL. This demonstrated that the spin relaxation time in MLG could be significantly extended when the charge experiences quantum interference effect in the coherent charge transport regime.

Keywords

spin relaxation magnetic materials and spin systems spin transport

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@article{arxiv.1303.1899,
  title  = {Spin Relaxation in Weak Localization Regime in Multilayer Graphene Spin Valves},
  author = {Takehiro Yamaguchi and Rai Moriya and Satoru Masubuchi and Kazuyuki Iguchi and Tomoki Machida},
  journal= {arXiv preprint arXiv:1303.1899},
  year   = {2013}
}

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10 pages, 2 figures, accepted to Jpn. J. Appl. Phys

Spin Relaxation in Weak Localization Regime in Multilayer Graphene Spin Valves

Abstract

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