Giant magnetothermal conductivity and giant magnetothermopower in granular Co-Ag solids

Author

Piraux, L. ; Cassart, M. ; Bayot, V. ; Jiang, J.Samuel ; Xiao, John Q. ; Chien, C.L.

Author_Institution

Unite de Physico-Chimie et de Phys. des Materiaux, Louvain-la-Neuve, Belgium

Volume

29

Issue

6

fYear

1993

fDate

11/1/1993 12:00:00 AM

Firstpage

2700

Lastpage

2704

Abstract

Measurements on the thermal conductivity and thermoelectric power of granular Co₂₀Ag₈₀ solids annealed at various temperatures are reported. Thermal conductivity is dominated by its electronic contribution, and the Wiedemann-Franz law to found to be satisfied between 2 K and 300 K, which is mainly ascribed to dominant large-angle elastic scattering processes. The thermoelectric power is negative, and is considerably reduced by the annealing process. Giant magnetothermal conductivity and giant magnetothermopower are found to be correlated with the giant magnetoresistance

Keywords

annealing; cobalt alloys; ferromagnetic properties of substances; magnetic thin films; magnetoresistance; nanostructured materials; silver alloys; thermal conductivity of solids; thermoelectric effects in metals and alloys; thermomagnetic effects; 2 to 300 K; Co₂₀Ag₈₀; Wiedemann-Franz law; annealing; giant magnetoresistance; giant magnetothermal conductivity; giant magnetothermopower; granular Co-Ag solids; large-angle elastic scattering; nanocrystalline; thermoelectric power; Annealing; Conductivity measurement; Giant magnetoresistance; Magnetoelasticity; Power measurement; Scattering; Solids; Temperature; Thermal conductivity; Thermoelectricity;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/20.280937

Filename

280937