Magneto-Optical Observation of CPP-GMR Device With Perpendicular Magnetic Anisotropy Driven by Spin Transfer Switching Using Transparent Top Electrode

Author

Funabashi, N. ; Aoshima, K. ; Machida, K. ; Kuga, K. ; Ishibashi, T. ; Shimidzu, N.

Author_Institution

Sci. & Technol. Res. Labs., Japan Broadcasting Corp., Tokyo, Japan

Volume

46

Issue

6

fYear

2010

fDate

6/1/2010 12:00:00 AM

Firstpage

1998

Lastpage

2001

Abstract

A new magneto-optical (MO) spatial light modulator (SLM) driven by spin transfer switching (STS) promises the realization of an ultra-high resolution SLM. However, its Kerr rotation angle was inadequate and required improvement using polar Kerr. Gd-Fe film, known as a material for MO disks, has a large MO effect. In this study, we applied a composite film with a Gd-Fe layer and multiple Co/Ni layers for a free layer of a CPP-GMR device. We fabricated a CPP-GMR device with perpendicular magnetic anisotropy and succeeded in magneto-optical observations driven by STS using a transparent top electrode.

Keywords

cobalt; cobalt alloys; composite materials; electrodes; gadolinium alloys; giant magnetoresistance; iron alloys; magnetic anisotropy; magneto-optical devices; magneto-optical effects; multilayers; nickel; thin films; CPP-GMR device; Gd-Fe-Co-Ni; MO disks; MO effect; composite film; current-perpendicular-to-plane-GMR device; free layer; magneto-optical observations; magneto-optical spatial light modulator; multiple layers; perpendicular magnetic anisotropy; polar Kerr; spin transfer switching; thin film; transparent top electrode; ultrahigh resolution SLM; Electrodes; Magnetic films; Magnetic modulators; Magnetic switching; Magnetooptic devices; Magnetooptic effects; Optical modulation; Perpendicular magnetic anisotropy; Sociotechnical systems; Spatial resolution; Magnetooptic Kerr effect; spatial light modulators; spin transfer switching;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/TMAG.2010.2042287

Filename

5467517