Influence of substitutional pairs of cobalt atoms on the magnetocrystalline anisotropy of cobalt-rich rare-earth compounds

摘要: Abstract The crystallographic structures of cobalt-rich rare-earth (R) compounds are determined by the ordering substitutional pairs Co atoms in same hexagonal RCo 5 basic structure. However, metastable at room temperature and contain some disordered substitutions. These substitutions induce a large decrease anisotropy Sm 1−s s Y 2Co alloys. Consequently, with each substitution there is associated negative value K 1 . A comparison strong uniaxial structure allows one to explain changes direction easy magnetization 2 (Co 1−x M x ) alloys, differences coercivity compounds.