Local Moment Formation and Resistivity Minima in CoAl Alloys

Autor:	G. R. Caskey, David J. Sellmyer
Rok vydání:	1969
Předmět:	Maxima and minima Materials science chemistry Magnetoresistance Field (physics) Condensed matter physics Aluminium Electrical resistivity and conductivity Impurity Seebeck coefficient General Physics and Astronomy chemistry.chemical_element Cobalt
Zdroj:	Journal of Applied Physics. 40:1476-1477
ISSN:	1089-7550 0021-8979
DOI:	10.1063/1.1657728
Popis:	Measurements of electrical resistivity, thermoelectric power, and magnetoresistance have been made from 1.4° to 300°K in alloys of 48%–57% cobalt in aluminum. At the equiatomic composition, CoAl has the CsCl structure. Resistance minima were observed in the vicinity of 30°K for cobalt concentrations between 50.4% and 51.5%. Below the resistance minima there is a temperature region where the dependence is approximately logarithmic before it saturates at about 1.4°K. The depth of the minima [ρ(1.4°K)−ρ(Tmin)] and the thermopower at 4.2°K both show rather sharp peaks as a function of concentration in the vicinity of 50.5% cobalt. The magnetoresistance of the samples showing minima is negative or T
Databáze:	OpenAIRE
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