CONDUCTION PROCESSES IN FERROMAGNETIC ALLOYS.

Abstract

Hall effect and magnetoresistance were measured in iron (resistivity ratio 1991 and 507) and in Fe-Co with 0.25, 0.50, 0.92%Co, in fields up to 7 Tesla at 4.2K. High-field and low-field Hall angles are related to asymmetric scattering. A side-jump mechanism is proposed for the Hall effect of ferromagnets at room temperature. It is found that the center of mass of a wave-packet undergoes a discontinuous and finite sideway displacement (delta y) of approximately 10 to the 11th power meter on scattering by a central potential, in the presence of spin-orbit interaction. Magnon heat conduction was detected in 70Ni-30Fe and 81Ni-19Fe, between 1.5K and 4K, up to 6 Tesla. Magnon conductivity varies as approximately T squared, and represents about 3.5% of total conductivity at 4K. Thermal-magnon life-time is about (2 x 10 to the -10th power) sec. (Author)

Document Details

Document Type
Technical Report
Publication Date
Mar 01, 1970
Accession Number
AD0706905

Entities

People

  • Luc Berger

Organizations

  • Carnegie Mellon University

Tags

Communities of Interest

  • Materials and Manufacturing Processes

DTIC Thesaurus Topics

  • Conductivity
  • Displacement
  • Hall Effect
  • Magnetoresistance
  • Physical Properties
  • Power Meters
  • Quantum Properties
  • Scattering
  • Spin-Orbit Interaction
  • Wave Packets

Fields of Study

  • Physics

Readers

  • Quantum spin resonance or Electron Paramagnetic Resonance spectroscopy.
  • Solar Physics
  • Superconducting Magnet Technology

Technology Areas

  • Microelectronics
  • Space
  • Space - Hall-Effect Thruster