X-ray magnetic circular dichroism of Gd/Fe multilayers

Author

Kato, T. ; Fujiwara, Y. ; Yano, K. ; Tsunashima, S. ; Iwata, S. ; Masuda, M.

Author_Institution

Dept. of Electron., Nagoya Univ., Japan

Volume

36

Issue

5

fYear

2000

fDate

9/1/2000 12:00:00 AM

Firstpage

2909

Lastpage

2911

Abstract

Gd(t nm)/Fe(t nm) multilayers in the range of 0.25<t<5 were prepared by rf magnetron sputtering. The structural analysis showed that the multilayers have compositional modulation for bilayer periods of Λ⩾1 nm, and have rather uniform alloy structure for Λ=0.5 nm. From an estimation using the X-ray sum rule, rather large Fe and Gd orbital moments of 0.4 and 0.16 μ_B, respectively, were obtained in the multilayer with Λ=1 nm. The quite small Fe spin moment observed in the multilayers for Λ=5.0 and 10.0 nm, together with the structural analysis, suggests the existence of an amorphous Fe layer having a spin glass like magnetic structure, which is known for YFe and LuFe alloys

Keywords

gadolinium; iron; magnetic circular dichroism; magnetic moments; magnetic multilayers; spin glasses; sputtered coatings; Gd-Fe; RF magnetron sputtering; X-ray magnetic circular dichroism; X-ray sum rule; compositional modulation; multilayers; orbital moments; spin glass; spin moment; Amorphous magnetic materials; Amorphous materials; Iron; Magnetic analysis; Magnetic anisotropy; Magnetic materials; Magnetic multilayers; Magnetic properties; Magnetic separation; Perpendicular magnetic recording;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/20.908624

Filename

908624