Lorentz microscopy observation of magnetic grains in co-sm // cr films

Y. Liu, Z. S. Shan, D. J. Sellmyer

Research output: Contribution to journalArticle

5 Citations (Scopus)

Abstract

This paper presents our recent Lorentz microscopy study of magnetic domain structure and its relation to the nanostructure of Co-Sm films. The magnetic domains were imaged by Foucault Lorentz mode and the corresponding nanostructure was revealed by bright field and high resolution images. The nanostructure is composed of clusters of 20 nm grown on Cr grains. Each cluster is formed by the amorphous matrix and about 5 nm crystallites distributed in the matrix. It is found that each cluster forms a magnetic grain. Such magnetic grains show uniform contrast near the magnetic domain wall, and correspond to the switching volume in magnetic reversal. The magnetic grain (about 20 nm) is much larger than the size of the crystallites (5 nm) distributed in the amorphous matrix. It is the magnetic grain size that affects the noise response when the film is used as a high density recording medium.

Original languageEnglish (US)
Pages (from-to)3614-3616
Number of pages3
JournalIEEE Transactions on Magnetics
Volume32
Issue number5 PART 1
DOIs
StatePublished - Dec 1 1996

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Magnetic domains
Nanostructures
Microscopic examination
magnetic domains
microscopy
Crystallites
crystallites
matrices
Domain walls
Image resolution
domain wall
grain size
recording
high resolution

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Electrical and Electronic Engineering

Cite this

Lorentz microscopy observation of magnetic grains in co-sm // cr films. / Liu, Y.; Shan, Z. S.; Sellmyer, D. J.

In: IEEE Transactions on Magnetics, Vol. 32, No. 5 PART 1, 01.12.1996, p. 3614-3616.

Research output: Contribution to journalArticle

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