Tunable Thermal Hysteresis in Magnetic Multilayers: Magnetic Superheating and Supercooling

Abstract

The phenomena of superheating and supercooling can lead to a thermal hysteresis curve where two states are stable over a range of temperatures. Here we present a simple magnetic multilayer system (Fe/Gd) that can be designed to show a thermal hysteresis curve. Calculations show that, with proper choice of parameters, the width, in temperature, of the hysteresis curve can be controlled by an external magnetic field and varies from 20 to 100K over a field range of 300 600 Oe. Polarized neutron reflectivity measurements confirm that such behavior is realized experimentally in multilayers of Fe/Gd.

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Document Details

Document Type
Technical Report
Publication Date
Oct 22, 2004
Accession Number
ADA469786

Entities

People

  • G. P. Felcher
  • H. Hashizume
  • N. Hosoito
  • R. E. Camley
  • W. Lohstroh

Organizations

  • University of Colorado, at Colorado Springs

Tags

Communities of Interest

  • Advanced Electronics

DTIC Thesaurus Topics

  • Anisotropy
  • Colorado
  • Films
  • High Temperature
  • Hysteresis
  • Low Temperature
  • Magnetic Fields
  • Magnetic Materials
  • Magnetic Moments
  • Magnetic Properties
  • Materials
  • Materials Science
  • Phase Diagrams
  • Phase Transformations
  • Supercooling
  • Superheating
  • Transitions

Fields of Study

  • Physics

Readers

  • Materials Science and Engineering.
  • Thermal Physics or Thermal Science.