SPIN WAVES IN THE SPIN-FLOP PHASE OF AN ANTIFERROMAGNET, AND METASTABILITY OF THE SPIN-FLOP TRANSITION

Abstract

The spin-flop transition in a uniaxial antiferromagnet defines three critical fields; that of the true thermodynamic transition and those limiting the local stability of antiferromagnetic and spin-flop phases. The latter two are calculated by a spin-wave analysis. The results are in qualitative agreement with the hysteresis observed by Schelleng and Friedberg in the spin-flop transition in manganese bromide. The spin-wave spectrum of the spin-flop phase is given, and the magnetization in the spin-flop phase is found to increase more rapidly that linearly with field because of quantum corrections absent in molecular field theory.

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Document Details

Document Type
Technical Report
Publication Date
Mar 01, 1964
Accession Number
AD0435887

Entities

People

  • Herbert B. Callen
  • Yung-li Wang

Organizations

  • University of Pennsylvania

Tags

Communities of Interest

  • Air Platforms

DTIC Thesaurus Topics

  • Anisotropy
  • Coordinate Systems
  • Crystal Lattice Vibrations
  • Curvature
  • Energy
  • Energy Gaps
  • Equations
  • Frequency
  • Government Procurement
  • Governments
  • Ground State
  • Hysteresis
  • Military Research
  • Phase
  • Phase Transformations
  • Spin Waves
  • Transitions

Fields of Study

  • Physics

Readers

  • Materials Science and Engineering.
  • Mycotoxin ecology in Amazonian ecosystems.
  • Quantum spin resonance or Electron Paramagnetic Resonance spectroscopy.

Technology Areas

  • Quantum Computing
  • Quantum Science - Quantum Dots