Electrical Resistivity of Chromium-Rich Chromium-Iron Alloys between 4° and 320°K

Abstract

Electrical resistivity, with and without transverse magnetic fields, of iron‐chromium alloys containing 0.9, 2.3, 3.3, 4.9, 6.5, 9.5, and 11.2 at. % iron have been studied between 4° and 320°K. Additions of iron to chromium decrease the Néel temperature from that of pure chromium. Below the Néel point, observable as a minimum in the ρ vs T curve, the electrical resistivity increase becomes larger with higher iron content. This anomaly cannot be explained by the energy gaps alone due to the antiferromagnetic ordering. Additions of iron to chromium drastically reduce its transverse positive magnetoresistivity to negative values. Magnetoresistivity data support the model that iron atoms enter the chromium matrix as localized magnetic moments.