Abstract
Ferromagnetic compounds Mn 1+δ Sb with NiAs crystal structure have a wide existing range (0≤δ≤0.22). Compounds of Mn 1.05 M δ Sb (M=Cr, Fe and Co) are prepared in order to study the electronic state of excess Mn in Mn 1+δ Sb. It is found that the excess cations occupy the same interstitial site as Mn, and have 0 µ B for the case of M=Cr and Mn and about 1 µ B for M=Fe and Co, and that they reduce the total magnetization and the Curie temperature at about the same rate as the case of M=Mn. A qualitative discussion is given on the analogy of transition atom impurities in metals.
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