CONDUCTION PROCESSES IN FERROMAGNETIC ALLOYS.
Rept. no. 2 (Final), Jan 69-Mar 70,
CARNEGIE-MELLON UNIV PITTSBURGH PA DEPT OF PHYSICS
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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
- Electricity and Magnetism
- Solid State Physics