Interfacial tuning of perpendicular magnetic anisotropy and spin magnetic moment in CoFe/Pd multilayers

JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS

卷:350

Article

Ngo, D-T.¹  Meng, Z. L.¹  Tahmasebi, T.^1,2  Yu, X.³  Thoeng, E.^3,4  Yeo, L. H.⁴  Rusydi, A.^3,4  Han, G. C.¹  Teo, K-L.¹ 

[1] Natl Univ Singapore, Dept Elect & Comp Engn, Singapore 117576, Singapore

[2] ASTAR, Data Storage Inst, Singapore 117608, Singapore

[3] Natl Univ Singapore, Singapore Synchrotron Light Source, Singapore 117603, Singapore

[4] Natl Univ Singapore, Dept Phys, Singapore 117542, Singapore

关键词: Magnetic multilayers;    Perpendicular magnetic anisotropy;    Magnetic domains and domain walls;    Interfacial magnetism;    X-ray magnetic circular dischroism;   

DOI  :  10.1016/j.jmmm.2013.08.063

来源: Elsevier

【 摘 要 】

We report on a strong perpendicular magnetic anisotropy in [CoFe 0.4 nm/Pd t](6) (t=1.0-2.0 nm) multilayers fabricated by DC sputtering in an ultrahigh vacuum chamber. Saturation magnetization, M-s, and uniaxial anisotropy, K-u, of the multilayers decrease with increasing the spacing thickness; with a M-s of 155 emu/cc and a K-u of 1.14 x 10(5) J/m(3) at a spacing thickness of t=2 nm. X-ray absorption spectroscopy and X-ray magnetic circular dichroism measurements reveal that spin and orbital magnetic moments of Co and Fe in CoFe film decrease as a function of Pd thickness, indicating the major contribution of surface/interfacial magnetism to the magnetic properties of the film. Crown Copyright (C) 2013 Published by Elsevier B.V. All rights reserved.

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