Microscopic origin of the reduced magnetocrystalline anisotropy with increasing oxide content in Co80Pt20 : oxide thin films

作者：Zhang Wen^*; Morton Simon A; Wong P K Johnny; Lu Bin; Xu Yongbing; de Jong Michel P; van der Wiel Wilfred G; van der Laan Gerrit

来源：Journal of Physics D: Applied Physics , 2013, 46(40): 405001.

DOI：10.1088/0022-3727/46/40/405001

Angle-dependent x-ray magnetic circular dichroism at the Co L-2.3 edges has been utilized to systematically study Co80Pt20 : WO3 perpendicular magnetic recording thin films, in which the magnetocrystalline anisotropy significantly drops as the oxide volume fraction increases. The microscopic origin of this phenomenon in the studied films can be mainly attributed to an increase in orbital moment normal to the grain-oxide interface, with increasing oxide volume fraction, which arises from a more pronounced effect of symmetry breaking at the grain-oxide interface in smaller grains.

• 出版日期2013-10-9
• 单位东南大学