Magnetocrystalline anisotropy-dependent six-fold symmetric anisotropic magnetoresistance in epitaxial CoxFe3-xO4 films

作者：Jin, C.^*; Li, P.; Mi, W. B.; Bai, H. L.

来源：EPL, 2012, 100(2): 27006.

DOI：10.1209/0295-5075/100/27006

• COBALT-SUBSTITUTED MAGNETITE
• THIN-FILMS
• ORIGIN
• FE3O4

The angular-dependent anisotropic magnetoresistance (AMR) of epitaxial CoxFe3-xO4 films has been investigated systematically. The six-fold symmetric AMR was observed in the (111)-oriented epitaxial CoxFe3-xO4 films in contrast to the four-fold symmetric AMR of the (100)- and (110)-oriented CoxFe3-xO4 films. The six-fold term appears at temperatures below 200 K, and becomes more pronounced with increasing x, while no six-fold term was found in epitaxial NixFe3-xO4 films. The six-fold characteristics observed in the epitaxial CoxFe3-xO4 films are considered to be induced by the large magnetocrystalline anisotropy caused by Co addition, which directly proves that the AMR of magnetite is intimately related to magnetocrystalline anisotropy.

• 出版日期2012-10
• 单位天津大学