Time dependence of GMR in granular alloys

Author

Greaves, S.J. ; Grady, K.O. ; Watson, M.L. ; Chantrell, R.W.

Author_Institution

SEECS, Gwynedd, UK

Volume

31

Issue

6

fYear

1995

fDate

11/1/1995 12:00:00 AM

Firstpage

3961

Lastpage

3963

Abstract

We have studied time dependent effects in NiFeAg granular alloy films at low temperatures. Measurements of the time dependence of magnetisation and resistivity have been made at 5 K. We have observed large time dependent changes in the magnetisation but much smaller changes in the resistivity at similar applied fields. The time dependence of magnetisation exhibits a peak in the magnetic viscosity at fields near to the coercivity whereas the resistivity time dependence is much smaller. We interpret this effect in terms of a simple approach relating the resistivity to M²

Keywords

coercive force; discontinuous metallic thin films; ferromagnetic materials; giant magnetoresistance; iron alloys; magnetisation; magnetoresistance; nickel alloys; silver alloys; 5 K; NiFeAg; NiFeAg films; coercivity; giant magnetoresistance; granular alloys; low temperatures; magnetic viscosity; magnetisation; resistivity; time dependence; Conductivity; Giant magnetoresistance; Magnetic field measurement; Magnetic films; Magnetic hysteresis; Magnetic materials; Magnetization; Temperature dependence; Temperature distribution; Time measurement;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/20.489830

Filename

489830