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Electrical resistivity near the critical boundary of antiferromagnet in NiS2-xSex

M Kamada, N Mori and T Mitsui

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The electrical resistivity at low temperature of metallic NiS2-xSex is measured at a temperature between 4.2 and 300K under high pressure up to 15 kbar. The resistivity is found to obey an expression rho = rho 0+ATn and the coefficient of A has a maximum at the critical boundary of antiferromagnet. The index n decreases from 2.0 to 1.6 as one approaches the critical boundary from the paramagnetic phase. These results seem to be explained by recent theoretical works based on the spin fluctuations.


PACS

72.15.Eb Electrical and thermal conduction in crystalline metals and alloys

75.50.Ee Antiferromagnetics

75.30.Kz Magnetic phase boundaries (including magnetic transitions, metamagnetism, etc.)

Subjects

Condensed matter: electrical, magnetic and optical

Dates

Issue 22 (28 November 1977)



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