Electromigration in Giant Magnetoresistance Spin Valve Read Sensors Under Pulsed DC Magnetic Field: An Analytical and Numerical Study

A theoretical model is proposed to investigate the electromigration (EM) behavior in giant magnetoresistance spin valve (GMR SV) read sensors under pulsed direct current (dc) magnetic field during sensor operation. It was found that the externally applied magnetic field gives rise to a more severe J...

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Bibliographic Details
Published in:IEEE transactions on magnetics 2013-02, Vol.49 (2), p.845-850
Main Authors: Zeng, Ding Gui, Lee, Kyoung-il, Chung, Kyung-Won, Bae, Seongtae
Format: Article
Language:English
Subjects:
Black's equation
Cross-disciplinary physics: materials science
rheology
Current density
electromigration (EM)
Exact sciences and technology
giant magnetoresistance spin valve (GMR SV) read sensor
Heating
Magnetic fields
Magnetic sensors
Magnetism
Materials science
Mathematical model
Other topics in materials science
Physics
pulsed direct current (dc) magnetic field
Temperature sensors
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Description
Summary:A theoretical model is proposed to investigate the electromigration (EM) behavior in giant magnetoresistance spin valve (GMR SV) read sensors under pulsed direct current (dc) magnetic field during sensor operation. It was found that the externally applied magnetic field gives rise to a more severe Joule heating and consequently raises the device temperature leading to EM acceleration. Black's equation was modified based on Green's function method and the Boltzmann equation to more precisely interpret the EM mean time to failure (MTTF) of GMR SV read sensors under pulsed dc magnetic field. The physical validity of this proposed model was confirmed by the comparisons with experimental results.
ISSN:0018-9464
1941-0069
DOI:10.1109/TMAG.2012.2212024