Magnetostriction and Magnetic Heterogeneities in Iron-Gallium

Abstract

Iron-gallium alloys Fe(sub 1-x)Ga(sub x) exhibit an exceptional increase in magnetostriction with gallium content. We present small-angle neutron scattering investigations on a Fe(sub 0:81)Ga(sub 0:19) single crystal. We uncover heterogeneities with an average spacing of 15 nm and with magnetizations distinct from the matrix. The moments in and around the heterogeneities are observed to reorient with an applied magnetic field or mechanical strain. We discuss the possible roles played by nanoscale magnetic heterogeneities in the mechanism for magnetostriction in this material.

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Document Details

Document Type
Technical Report
Publication Date
Jul 08, 2010
Accession Number
ADA579075

Entities

People

  • Alison B. Flatau
  • C. Mudivarthi
  • J. R. Cullen
  • M. Laver
  • Manfred Wuttig
  • S. M. Watson
  • Wei Chen

Organizations

  • University of Maryland

Tags

Communities of Interest

  • Advanced Electronics
  • Air Platforms
  • Energy and Power Technologies

DTIC Thesaurus Topics

  • Alloys
  • Anisotropy
  • Crystal Structure
  • Detectors
  • Domain Walls
  • Electron Microscopy
  • Engineering
  • Gallium
  • Gallium Alloys
  • Magnetic Domains
  • Magnetic Fields
  • Materials
  • Materials Science
  • Neutron Scattering
  • Quantum Properties
  • Scattering
  • Single Crystals

Fields of Study

  • Physics

Readers

  • Materials Science and Engineering.
  • Nanoscale Plasmonic Nanotechnology
  • Semiconductor Device Technology

Technology Areas

  • Microelectronics
  • Space