Origin of Perpendicular Magnetic Anisotropy in Ultrathin [Pt∕Co][sub 4]∕NiO Multilayers | Zendy

Chyun-H. Su | Zendy; ShenChuan Lo | Zendy; Shan-Haw Chiou | Zendy; KoWei Lin | Zendy; Wen Ouyang | Zendy; Hao Ouyang | Zendy

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Origin of Perpendicular Magnetic Anisotropy in Ultrathin [Pt∕Co][sub 4]∕NiO Multilayers

Author(s) -

Chyun-H. Su,

ShenChuan Lo,

Shan-Haw Chiou,

KoWei Lin,

Wen Ouyang,

Hao Ouyang

Publication year - 2008

Publication title -

electrochemical and solid-state letters

Language(s) - English

Resource type - Journals

eISSN - 1944-8775

pISSN - 1099-0062

DOI - 10.1149/1.3032906

Subject(s) - materials science , perpendicular , condensed matter physics , anisotropy , magnetization , magnetic anisotropy , non blocking i/o , plane (geometry) , work (physics) , magnetic field , optics , geometry , physics , thermodynamics , chemistry , biochemistry , mathematics , quantum mechanics , catalysis

As individual layers in [Pt/Co](4)/NiO multilayers become thinner, the role of interfaces and surfaces can dominate that of the bulk. A perpendicular interface contribution to the magnetic anisotropy can rotate the easy magnetization direction from within the film plane to perpendicular to the film plane as the thickness of Co is below the critical value in the range of nano- or subnanoscale. In this work, the mixed CoPt phases were found to be responsible for the perpendicular magnetic anisotropy, driven by the negative heat of mixing and relatively unstable interfacial structure caused by the different structure of the NiO underlayer as the thickness of Co is below 1.2 nm

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