Electrical resistivities of γ-phase FexNi80−xCr20 alloys

Banerjee, S. ; Raychaudhuri, A. K. (1994) Electrical resistivities of γ-phase FexNi80−xCr20 alloys Physical Review B: Condensed Matter and Materials Physics, 50 (12). pp. 8195-8206. ISSN 0163-1829

Full text not available from this repository.

Official URL: http://prb.aps.org/abstract/PRB/v50/i12/p8195_1

Related URL: http://dx.doi.org/10.1103/PhysRevB.50.8195


In this paper we present a comprehensive investigation of electrical resistivities [ρ(T)] of the γ-phase pseudobinary Fe alloy series FexNi80−xCr20 in the temperature range 0.4-300 K. These alloys exhibit exotic magnetic behavior at and near the critical composition for ferromagnetism xc⋍59-63. Special attention has been given to the critical region (x⋍xc) where we find sharp changes in ρ0 (zero temperature resistivity) as well as in the temperature dependence of ρ(T). These observations have been explained as arising due to the absence of long-range magnetic order and a change in effective carrier concentration at x⋍xc. For all x (≤66) these alloys exhibit a resistivity minimum at T=Tmin. Tmin continuously decreases from approximately 35 K for x≊12 to approximately 6 K for x≊59. ρ(T) for T<Tmin shows a rise (ρ∼−√T ) that does not depend on the magnetic state of the alloy. For Tmin<T<80 K, ρ(T) away from xc follows a predominantly T2 dependence arising from electron-spin-wave scattering which shows a drastic reduction for x≊xc. We also compare our data with an α-phase Fe25Cr75 alloy.

Item Type:Article
Source:Copyright of this article belongs to The American Physical Society.
ID Code:42695
Deposited On:06 Jun 2011 06:57
Last Modified:06 Jun 2011 06:57

Repository Staff Only: item control page