Time Dependence of GMR in Granular Alloys

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

doi:10.1109/20.489830

Time Dependence of GMR in Granular Alloys

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

Research output: Contribution to journal › Article › peer-review

1 Citation (Scopus)

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 5K. 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.

Original language	English
Pages (from-to)	3961-3963
Number of pages	3
Journal	IEEE Transactions on Magnetics
Volume	31
Issue number	6
DOIs	https://doi.org/10.1109/20.489830
Publication status	Published - 1995 Nov
Externally published	Yes

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Electrical and Electronic Engineering

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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 5K. 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.",

author = "Greaves, {S. J.} and K. O'Grady and Watson, {M. L.} and Chantrell, {R. W.}",

year = "1995",

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AU - Greaves, S. J.

AU - O'Grady, K.

AU - Watson, M. L.

AU - Chantrell, R. W.

PY - 1995/11

Y1 - 1995/11

N2 - 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 5K. 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.

AB - 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 5K. 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.

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ER -

Time Dependence of GMR in Granular Alloys

Abstract

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