Accession Number : AD0290789

Title :   INFLUENCE OF SPIN-ORBIT INTERACTION ON THE TRANSPORT PROCESSES IN FERROMAGNETIC NICKEL ALLOYS, IN THE PRESENCE OF A DEGENERACY OF THE 3D BAND

Corporate Author : CARNEGIE INST OF TECH PITTSBURGH PA

Personal Author(s) : BERGER,L.

Report Date : 30 OCT 1962

Pagination or Media Count : 1

Abstract : Assuming that two of the five branches of the 3d band intersect, it is shown that singularities result in the transport properties when such an intersection happens to pass at the Fermi level. The ferromagnetic anisotropy of resistivity (often called magnetoresistance effect) is expected to have a strong maximum; using Born approximation for impurity scattering, and simple models of the 3d and 4s bands, a detailed computation provides an order of magnitude of 20% for the value of at the maximum. On the other hand, assuming the validity of current theories of the extraordinary Hall conductivity due to Smit or to Karplus and Luttinger, may be expected to change sign. This is precisely the behavior of and observed by Smit in Co-Ni and Fe-Ni alloys, for an electron concentration equal to 27.7 el./at.. (Author)

Descriptors :   (*NUCLEAR SPINS), (*TRANSPORT PROPERTIES), (*BRILLOUIN ZONES), (*FERROMAGNETISM), (*NICKEL ALLOYS), (*HALL EFFECT), TENSOR ANALYSIS

Distribution Statement : APPROVED FOR PUBLIC RELEASE