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From the same journal

Magnetic patterning: local manipulation of the intergranular exchange coupling via grain boundary engineering

Research output: Contribution to journalArticle

Author(s)

  • Kuo-Feng Huang
  • Jung-Wei Liao
  • Cheng-Yu Hsieh
  • Liang-Wei Wang
  • Yen-Chun Huang
  • Wei-Chih Wen
  • Mu-Tung Chang
  • Shen-Chuan Lo
  • Jun Yuan
  • Hsiu-Hau Lin
  • Chih-Huang Lai

Department/unit(s)

Publication details

JournalScientific Reports
DatePublished - 9 Jul 2015
Volume5
Number of pages11
Pages (from-to)1-11
Original languageEnglish

Abstract

Magnetic patterning, with designed spatial profile of the desired magnetic properties, has been a rising challenge for developing magnetic devices at nanoscale. Most existing methods rely on locally modifying magnetic anisotropy energy or saturation magnetization, and thus post stringent constraints on the adaptability in diverse applications. We propose an alternative route for magnetic patterning: by manipulating the local intergranular exchange coupling to tune lateral magnetic properties. As demonstration, the grain boundary structure of Co/Pt multilayers is engineered by thermal treatment, where the stress state of the multilayers and thus the intergranular exchange coupling can be modified. With Ag passivation layers on top of the Co/Pt multilayers, we can hinder the stress relaxation and grain boundary modification. Combining the pre-patterned Ag passivation layer with thermal treatment, we can design spatial variations of the magnetic properties by tuning the intergranular exchange coupling, which diversifies the magnetic patterning process and extends its feasibility for varieties of new devices.

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