Critical Behavior in Magnetic Superlattices

Abstract

Based on the effective field theory with correlations, the critical behavior of a magnetic superlattice consisting of two different ferromagnets is examined. A simple cubic Ising model with nearest-neighbor coupling is assumed. It is found that there exists a critical value for the interface exchange coupling above which the interface magnetism appears. The critical temperature of the superlattice is studied as a function of the thickness of the constituents in a unit cell and of the exchange coupling energies in each material. A phase diagram is also given.

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Document Details

Document Type
Technical Report
Publication Date
Jan 01, 1991
Accession Number
ADA231327

Entities

People

  • Duoliang Lin
  • T. Hai
  • Thomas F. George
  • Z. Y. Li

Organizations

  • University at Buffalo

Tags

Communities of Interest

  • Energy and Power Technologies
  • Weapons Technologies

DTIC Thesaurus Topics

  • Chemistry
  • Critical Temperature
  • Crystal Structure
  • Diagrams
  • Energy
  • Equations
  • Ferromagnetic Materials
  • Magnetic Materials
  • Magnetic Properties
  • Materials
  • Military Research
  • New York
  • Phase Diagrams
  • Phase Transformations
  • Physics
  • Transition Temperature
  • United States

Fields of Study

  • Physics

Readers

  • Quantum Dot Semiconductor Device Photonics and Graphene Optoelectronic Materials and THz Physics.
  • Quantum spin resonance or Electron Paramagnetic Resonance spectroscopy.