Magnetization Switching and Hall Effect in Co/Pd-Based Pseudospin-Valves With Perpendicular Magnetic Anisotropy

Author

Jun-Yang Chen ; Thiyagarajah, Naganivetha ; Rode, Karsten ; Ashworth, Timothy V. ; Coey, J.M.D.

Author_Institution

Sch. of Phys., Trinity Coll., Dublin, Ireland

Volume

50

Issue

11

fYear

2014

fDate

Nov. 2014

Firstpage

1

Lastpage

4

Abstract

Magnetoresistance (MR), extraordinary Hall effect (EHE), planar Hall effect (PHE), and low-frequency noise are measured on pseudospin-valves based on Co/Pd multilayers with perpendicular magnetic anisotropy. In unpatterned films, a current-in-plane MR of 3.8% was obtained with a Cu spacer layer thickness of 2.0 nm. Large anomalous peaks observed in EHE and PHE in the narrow range of field where switching occurs are associated with multidomain magnetization during the reversal process. Magnetic field-and time-dependent noise indicates that the magnitude of the noise is directly related to magnetization switching in this system.

Keywords

Hall effect; cobalt; magnetic multilayers; magnetic noise; magnetic switching; magnetic thin films; magnetisation; magnetoresistance; palladium; perpendicular magnetic anisotropy; spin valves; Co-Pd; Cu; extraordinary Hall effect; low-frequency noise; magnetization switching; magnetoresistance; multidomain magnetization; multilayers; perpendicular magnetic anisotropy; planar Hall effect; pseudospin-valves; reversal process; size 2.0 nm; unpatterned films; Magnetic domains; Magnetic multilayers; Magnetization; Noise; Perpendicular magnetic recording; Saturation magnetization; Switches; 1/f noise; Co/Pd-based pseudospin-valves (PSVs); giant magnetoresistance (GMR); perpendicular magnetic anisotropy (PMA);

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/TMAG.2014.2323221

Filename

6971365