Peculiar Magnetic Properties of the Half-metallic Co2CrAl Heusler Alloy

Abstract

A giant negative magnetization in Co2CrAl compound, in both bulk and thin films, below a certain temperature (T-z) was observed. Above T-z, the compound behaves as an ordinary ferromagnet. The negative magnetic alignment might be initiated by Landau diamagnetism because of the half-metallic properties, and the pinning of the negative magnetization is preserved by the peculiar electronic structures.