AIP conference proceedings · 1973 · 10 citations · 0 references
Natural SciencesMaterials SciencePhysicsCondensed Matter PhysicsMagnetic MaterialsSolid State PhysicsAlloysAntiferromagnetic MaterialsAntiferromagnetismMagnetic Properties Of SolidsMagnetic SusceptibilityMagnetism In SolidsAntiferromagnetic OrderAntiferromagnetic OrderingDilute Solution PropertiesKondo EffectMagnetic AlloysMagnetic Ordering StudiesMagnetic Susceptibility SpectroscopyTemperature Dependence
The temperature dependence of the low field (∼5 gauss) magnetic susceptibility, χ(T), of AuFe alloys with concentrations 0.05 ≤ C ≤ 0.5 at.% Fe has been studied using a low frequency a‐c technique. Sharp peaks in χ(T) are found to exist for alloys with C at least as low as 0.1%, indicating that the antiferromagnetic ordering found at higher concentrations (13% ≥ C ≥ 1%) also exists in these dilute alloys. The ordering temperatures To determined from max are proportional to Cm where m ≃ 0.6 for the entire range of antiferromagnetic alloys 13% ≥ C ≥ 0.1%. For dilute concentrations the onset of antiferromagnetic order at To corresponds to the destruction of the Kondo state evidenced by the breakdown of the typical Kondo resistivity behavior below To.