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(001) FePt Graded Media with PtMn Underlayers



Chao-Chien Chiang, Wu-Chang Tsai, Liang-Wei Wang, Hao-Cheng Hou, Jung-Wei Liao, Hong-Ji Lin, Fan-Hsiu Chang, Brian Kirby, Chih-Huang Lai


(001)-oriented FePt graded media are obtained by using PtMn underlayers. The PtMn underlayer does not only behave as the (001) structural template, but provides the diffusion source of Mn. The diffusion of Mn into FePt reduces its anisotropy but, on the other hand, the exchange coupling between antiferromagnetic PtMn and ferromagnetic FePt enhances the anisotropy. Hysteresis loops taken from X-ray magnetic circular dichroism confirm the competition between these two effects leads to the lowest anisotropy in the middle of FePt.
Applied Physics Letters


magnetic multilayers


Chiang, C. , Tsai, W. , Wang, L. , Hou, H. , Liao, J. , Lin, H. , Chang, F. , Kirby, B. and Lai, C. (2012), (001) FePt Graded Media with PtMn Underlayers, Applied Physics Letters, [online], (Accessed July 15, 2024)


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Created October 31, 2012, Updated October 12, 2021