Icosahedral and Other Quasicrystal Phases in Magnetic Alloy Systems

Abstract

The aim of this program was to understand the consequences long-range and short-range icosahedral order on magnetism in quasi-crystalline alloys. At the time of its outset, there were no known or suspected magnetic quasi-crystals. We set out to make some and succeeded. We later showed these alloys to be concentrated spin glass. Along the way we made new quasi-crystals in the TiNi(Fe) Si system that showed no quadrupole splitting in their Mossbauer spectrum. This strongly suggests high site symmetry for the iron absorbers. We did extensive work on transition-metal-substituted Mn-Al-Si quasi-crystals gaining insight into the interplay between site selection, site volume and magnetic moment formation. (TTL)

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Document Details

Document Type
Technical Report
Publication Date
Sep 12, 1990
Accession Number
ADA227987

Entities

People

  • R. C. O'handley

Organizations

  • Massachusetts Institute of Technology

Tags

Communities of Interest

  • Advanced Electronics

DTIC Thesaurus Topics

  • Alloys
  • Crystals
  • D Band
  • Ferromagnetic Materials
  • Ferromagnetism
  • Fiber Spinning
  • Magnetic Alloys
  • Magnetic Moments
  • Magnetic Properties
  • Materials
  • Metals
  • Quasicrystals
  • Sites
  • Spectra
  • Symmetry
  • Transition Metals
  • Transitions

Fields of Study

  • Physics

Readers

  • Quantum spin resonance or Electron Paramagnetic Resonance spectroscopy.
  • Solar Photovoltaics and Thermoelectric Devices.