Diffusion based degradation mechanisms in giant magnetoresistive spin valves

Spin valve systems based on the giant magnetoresistive effect as used, for example, in hard disks and automotive applications consist of several functional metallic thin film layers. We have identified by secondary ion mass spectrometry two main degradation mechanisms: one is related to oxygen diffu...

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Published in:Applied physics letters 2008-07, Vol.93 (1)
Main Authors: Hawraneck, Matthias, Zimmer, Jürgen, Raberg, Wolfgang, Prügl, Klemens, Schmitt, Stephan, Bever, Thomas, Flege, Stefan, Alff, Lambert
Format: Article
Language:English
Subjects:
LAYERS
MAGNETIC DISKS
MAGNETORESISTANCE
MASS SPECTRA
MASS SPECTROSCOPY
MATERIALS SCIENCE
OXIDATION
SPIN
TANTALUM NITRIDES
THIN FILMS
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cited_by cdi_FETCH-LOGICAL-c292t-fd199f763add0e115b1848f8882185781645f579a3548e592a52cf4dffa0293
cites cdi_FETCH-LOGICAL-c292t-fd199f763add0e115b1848f8882185781645f579a3548e592a52cf4dffa0293
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container_issue 1
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container_title Applied physics letters
container_volume 93
creator Hawraneck, Matthias
Zimmer, Jürgen
Raberg, Wolfgang
Prügl, Klemens
Schmitt, Stephan
Bever, Thomas
Flege, Stefan
Alff, Lambert
description Spin valve systems based on the giant magnetoresistive effect as used, for example, in hard disks and automotive applications consist of several functional metallic thin film layers. We have identified by secondary ion mass spectrometry two main degradation mechanisms: one is related to oxygen diffusion through a protective cap layer and the other one is interdiffusion directly at the functional layers of the giant magnetoresistive stack. By choosing a suitable material as cap layer (TaN), the oxidation effect can be suppressed.
doi_str_mv 10.1063/1.2956394
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subjects LAYERS
MAGNETIC DISKS
MAGNETORESISTANCE
MASS SPECTRA
MASS SPECTROSCOPY
MATERIALS SCIENCE
OXIDATION
SPIN
TANTALUM NITRIDES
THIN FILMS
title Diffusion based degradation mechanisms in giant magnetoresistive spin valves
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