Spin transfer torque in magnetic tunnel junctions with synthetic ferrimagnetic layers

M. Ichimura, T. Hamada, H. Imamura, S. Takahashi, S. Maekawa

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

Based on the spin-polarized free-electron model, we derive the spin transfer torque in the magnetic tunnel junctions with the synthetic ferrimagnetic layers by analyzing the spin and charge transports in the ballistic regime. In the realistic junctions, the spin torque exerted on the magnetizations of two ferromagnetic layers in the synthetic ferrimagnetic layer shows the unidirectional rotation. It is suggested that, through the antiferromagnetic interlayer coupling in the synthetic ferrimagnetic layer, this unidirectional rotation induces the cooperative reversal of magnetizations in two ferromagnetic layers, and expected that this cooperative rotation reduces the critical current for the magnetization reversal in the synthetic ferrimagnetic layer.

Original languageEnglish
Title of host publicationProceedings of the 9th International Symposium on Foundations of Quantum Mechanics in the Light of New Technology, ISQM-Tokyo 2008
PublisherWorld Scientific Publishing Co. Pte Ltd
Pages146-149
Number of pages4
ISBN (Print)981428212X, 9789814282123
DOIs
Publication statusPublished - 2009
Event9th International Symposium on Foundations of Quantum Mechanics in the Light of New Technology, ISQM-Tokyo 2008 - Hatoyama, Saitama, Japan
Duration: 2008 Aug 252008 Aug 28

Publication series

NameProceedings of the 9th International Symposium on Foundations of Quantum Mechanics in the Light of New Technology, ISQM-Tokyo 2008

Other

Other9th International Symposium on Foundations of Quantum Mechanics in the Light of New Technology, ISQM-Tokyo 2008
CountryJapan
CityHatoyama, Saitama
Period08/8/2508/8/28

Keywords

  • Magnetic Tunnel Junction
  • Spin Transfer Torque
  • Spintronics

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics

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  • Cite this

    Ichimura, M., Hamada, T., Imamura, H., Takahashi, S., & Maekawa, S. (2009). Spin transfer torque in magnetic tunnel junctions with synthetic ferrimagnetic layers. In Proceedings of the 9th International Symposium on Foundations of Quantum Mechanics in the Light of New Technology, ISQM-Tokyo 2008 (pp. 146-149). (Proceedings of the 9th International Symposium on Foundations of Quantum Mechanics in the Light of New Technology, ISQM-Tokyo 2008). World Scientific Publishing Co. Pte Ltd. https://doi.org/10.1142/9789814282130_0032