Accession Number:

AD0706905

Title:

CONDUCTION PROCESSES IN FERROMAGNETIC ALLOYS.

Descriptive Note:

Rept. no. 2 (Final), Jan 69-Mar 70,

Corporate Author:

CARNEGIE-MELLON UNIV PITTSBURGH PA DEPT OF PHYSICS

Personal Author(s):

Report Date:

1970-03-01

Pagination or Media Count:

51.0

Abstract:

Hall effect and magnetoresistance were measured in iron resistivity ratio 1991 and 507 and in Fe-Co with 0.25, 0.50, 0.92Co, 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

Subject Categories:

  • Electricity and Magnetism
  • Solid State Physics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE