Reference layer exchange in spin transfer torque experiment using magnetic-coated nanometric point contacts

JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS

卷:324

Article

Cunha, R. O.¹  Baptista, D. L.¹  Heinemann, M.¹  Kuhn, M. F.¹  Schmidt, J. E.¹  Pereira, L. G.¹ 

[1] Univ Fed Rio Grande do Sul, Inst Fis, BR-91501970 Porto Alegre, RS, Brazil

关键词: Spin transfer torque;    Nanotips;    Magnetic nanotips;    Magnetic multilayers;    Polarizer layer;    Magneto transport in nanotips;   

DOI  :  10.1016/j.jmmm.2012.04.043

来源: Elsevier

【 摘 要 】

We investigate the importance of using nanotips on a point contact spin-transfer torque (STT) experiment. A systematic analysis comparing the STT in a magnetic thin film in current-perpendicular-to-plane (CPP) geometry sample for magnetic coated and uncoated tungsten nanotips is shown. The STT effect presents a reverse resistance to current behavior when using a magnetic coating layer on the nanotips. We demonstrate that the magnetic layer on the tip may assume the role of a polarizer layer. This effect opens up the possibility of exploiting simpler architectures in STT-based devices, such as STT-random access memory (STT-RAM). (C) 2012 Elsevier BY. All rights reserved.

【 授权许可】

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