Journal of the Physical Society of Japan · 1981 · 19 citations · 8 references
Natural SciencesMaterials SciencePhysicsCondensed Matter PhysicsMagnetic MaterialsSolid State PhysicsCurie TemperatureFerromagnetic MaterialsFerromagnetismMagnetic Properties Of SolidsMagnetism In SolidsPhase TransitionsCurie Temperature DeterminationFerromagnetic Phase TransitionsMagnetic Specific HeatSpecific Heat CapacitySpin ResonanceTemperature Dependence Of MagnetizationTemperature-dependent MagnetizationTransition Metal Magnetism
Magnetization measurements have been carried out to study various types of magnetism in degenerate magnetic semiconductors Sn 1- x (Me) x Te with different 3d transition metals Me=Cr, Fe, Co, and Ni. Of these impurities with x =1 at.%, only Cr and Fe act as ferromagnetic centers, while Co and Ni are magnetically ineffective in the host SnTe matrix which has a strong diamagnetic background. In particular, Sn 1- x Cr x Te (0.2 at.%< x <2 at.%) exhibits a ferromagnetic transition at the Curie temperature T c which varies from 150 K to 300 K depending on the Cr concentration and the annealing. This transition was confirmed by the anomalies in the spin resonance (g-value and linewidth), the resistivity, and the specific heat.
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