Sub-micron scale relief structures of GMR materials fabricated by half-milling control

Yukio Nozaki, T. Misumi, K. Matsuyama

Research output: Contribution to journalArticle

5 Citations (Scopus)

Abstract

We have investigated the magneto-transport properties of a GMR material consisting of CoPt(10 nm)/Cu(10 nm)/NiFe(6 nm) in which only the top NiFe layer is patterned by the half-milling technique. The top NiFe film was structured into a two-dimensional particle array with lateral dimensions of w = 0.2 μm and aspect ratio L/w = 1, 2, 4 or 8. From MR measurements, the remanent magnetization of the NiFe particle array was found to gradually decrease with L/w, which can be ascribed to the relative increase of an end domain area in the particles. The longitudinal switching field Hswt markedly decreases as L/w < 2. From the micromagnetic simulation, it was found that the decrease of Hswt was caused by the change of switching configuration from an edge reversal to a coherent rotation with decreasing L/w.

Original languageEnglish
Pages (from-to)237-239
Number of pages3
JournalJournal of Magnetism and Magnetic Materials
Volume239
Issue number1-3
DOIs
Publication statusPublished - 2002 Feb
Externally publishedYes

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Transport properties
Aspect ratio
Magnetization
aspect ratio
transport properties
magnetization
configurations
simulation

Keywords

  • Magnetization reversal
  • Micromagnetic simulation
  • Spin valve

ASJC Scopus subject areas

  • Condensed Matter Physics

Cite this

Sub-micron scale relief structures of GMR materials fabricated by half-milling control. / Nozaki, Yukio; Misumi, T.; Matsuyama, K.

In: Journal of Magnetism and Magnetic Materials, Vol. 239, No. 1-3, 02.2002, p. 237-239.

Research output: Contribution to journalArticle

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