Origin of Superparamagnetism in the CsCl-Type Compounds, Fe_<1-x>Ti_<1+x>, near the Stoichiometric Composition

概要

論文の詳細を見る
A superparamagnetic behavior at low temperatures is observed in the magnetization and the specific heat of the CsCl-type compounds, Fe_<1-x>Ti_<1+x>, near the stoichiometric composition. The concentration and the magnitude of magnetic moment of the superparamagnetic cluster are estimated from the experimental results as 1.0×10^<-3> per atom and 12μ_B per cluster, respectively. This behavior, however, becomes abruptly weak in the titanium-rich compositions beyond 51 at% Ti, where the anomalous transport phenomena similar to the Kondo effect are observed. This characteristic composition dependence suggests that the superparamagnetism in Fe_<1-x>Ti_<1+x> with x≈0 is due to the magnetic iron cluster, that is expected from the trace of Laves phase or the antiphase boundary of CsCl-type structure produced by a peritectic formation in these compounds near the stoichiometric composition.
社団法人日本物理学会の論文
1974-09-15