Moessbauer Investigation of Mg2Ni0.75Fe0.25 and Its Hydride

Abstract

We investigated the magnetic and structural properties of a mischmetal-nickel-iron intermetallic and its hydride, using magnetization, Mossbauer, X-ray diffraction, and SEM measurements. Magnetic measurements as a function of temperature were run on the mischmetal and its hydride. Both samples have a Tx near 200 K. It is a ferromagnetic or ferrimagnetic type ordering. At room temperature, above Tc, hydrogenation increased the susceptibility by nearly a factor of two, whereas below Tc, the susceptibility was lowered considerably. Thus, it is very clear that hydrogenation has affected the magnetic moments although the basic magnetic ordering of the material appears to remain unchanged. Tc occurs near 200 K.

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Document Details

Document Type
Technical Report
Publication Date
Nov 15, 1988
Accession Number
ADA203798

Entities

People

  • Frederick W. Oliver
  • Windsor Morgan

Organizations

  • Morgan State University

Tags

DTIC Thesaurus Topics

  • Diffraction
  • Electron Density
  • Electron Microscopy
  • Electrons
  • Elements
  • High Pressure
  • High Temperature
  • High Temperature Superconductors
  • Hydrogenation
  • Low Temperature
  • Magnetic Properties
  • Materials
  • Measurement
  • Scanning Electron Microscopy
  • Structural Properties
  • X Rays
  • X-Ray Diffraction

Fields of Study

  • Physics

Readers

  • Materials Science and Engineering.
  • Plasma Physics / Magnetohydrodynamics
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