MR measurement of sub-micron scale relief structures fabricated in GMR materials

K. Matsuyama, Yukio Nozaki, T. Misumi

Research output: Contribution to journalArticle

2 Citations (Scopus)

Abstract

Understanding of magnetization process in patterned thin films is important for their applications in downsizing various magnetic devices. This paper deals with an experimental technique which enables us to characterize magnetization process in the ends of patterned ultra-thin films. In this study, only the top layer of magnetic sandwich structures were patterned into an array of fine magnetic particles using electron beam lithography and Ar ion milling to form relief structures in the films. The magnetization process of the arrays was inferred from magnetoresistance (MR) measurements of the films. MR behaviors of particle array samples of substrate/FM1/Cu/FM2 (FM1, FM2 = Co, NiFe, CoPt) in different pattern widths of ω = 0.2 and 0.6 μm, lengths L ranging from 0.2 to 280 μm and thicknesses of t = 6 and 18 nm were studied. From longitudinal MR measurements, a distinct decrease in remanent magnetization was found for sub-μm particle arrays, which may be associated with the formation of edge domains in the particles.

Original languageEnglish
Pages (from-to)2114-2116
Number of pages3
JournalIEEE Transactions on Magnetics
Volume37
Issue number4 I
DOIs
Publication statusPublished - 2001 Jul
Externally publishedYes

Fingerprint

Magnetoresistance
Magnetization
magnetization
Magnetic devices
Sandwich structures
sandwich structures
Electron beam lithography
Ultrathin films
particle beams
thin films
lithography
electron beams
Ions
Thin films
Substrates
ions

Keywords

  • EB lithography
  • Magnetic domain
  • Magnetization reversal
  • Spin valve

ASJC Scopus subject areas

  • Electrical and Electronic Engineering
  • Physics and Astronomy (miscellaneous)

Cite this

MR measurement of sub-micron scale relief structures fabricated in GMR materials. / Matsuyama, K.; Nozaki, Yukio; Misumi, T.

In: IEEE Transactions on Magnetics, Vol. 37, No. 4 I, 07.2001, p. 2114-2116.

Research output: Contribution to journalArticle

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