論文

2018年12月1日

Shape anisotropy revisited in single-digit nanometer magnetic tunnel junctions

Nature Communications
  • K. Watanabe
  • ,
  • B. Jinnai
  • ,
  • S. Fukami
  • ,
  • H. Sato
  • ,
  • H. Ohno

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1
記述言語
英語
掲載種別
研究論文(学術雑誌)
DOI
10.1038/s41467-018-03003-7
出版者・発行元
Nature Publishing Group

Nanoscale magnetic tunnel junctions play a pivotal role in magnetoresistive random access memories. Successful implementation depends on a simultaneous achievement of low switching current for the magnetization switching by spin transfer torque and high thermal stability, along with a continuous reduction of junction size. Perpendicular easy-axis CoFeB/MgO stacks possessing interfacial anisotropy have paved the way down to 20-nm scale, below which a new approach needs to be explored. Here we show magnetic tunnel junctions that satisfy the requirements at ultrafine scale by revisiting shape anisotropy, which is a classical part of magnetic anisotropy but has not been fully utilized in the current perpendicular systems. Magnetization switching solely driven by current is achieved for junctions smaller than 10 nm where sufficient thermal stability is provided by shape anisotropy without adopting new material systems. This work is expected to push forward the development of magnetic tunnel junctions toward single-digit nm-scale nano-magnetics/spintronics.

リンク情報
DOI
https://doi.org/10.1038/s41467-018-03003-7
PubMed
https://www.ncbi.nlm.nih.gov/pubmed/29445169
URL
https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=85042131061&origin=inward 本文へのリンクあり
Scopus Citedby
https://www.scopus.com/inward/citedby.uri?partnerID=HzOxMe3b&scp=85042131061&origin=inward
ID情報
  • DOI : 10.1038/s41467-018-03003-7
  • ISSN : 2041-1723
  • eISSN : 2041-1723
  • PubMed ID : 29445169
  • SCOPUS ID : 85042131061

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