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|Title:||Numerical simulation of current density induced magnetic failure for giant magnetoresistance spin valve read sensors||Authors:||Zeng, D.G.
|Issue Date:||15-Jul-2010||Citation:||Zeng, D.G., Chung, K.-W., Judy, J.H., Bae, S. (2010-07-15). Numerical simulation of current density induced magnetic failure for giant magnetoresistance spin valve read sensors. Journal of Applied Physics 108 (2) : -. ScholarBank@NUS Repository. https://doi.org/10.1063/1.3463380||Abstract:||It was numerically demonstrated that current-in-plane (CIP) and current-perpendicular-to-plane (CPP) Ir20Mn80 based giant magnetoresistance spin valve read sensors operating at an extremely high current density (J≥1×108 A/cm2) show completely different electrical and magnetic failure mechanisms: (1) CIP read sensors, electromigration-induced Cu spacer diffusion and correspondingly degraded interlayer coupling were primarily responsible for the failures; while, (2) CPP read sensors, the deterioration of exchange bias due to thermomigration-induced Mn interdiffusion at the Co80Fe20 /Ir20Mn 80 interface was found to be dominant. The different temperature and current distribution resulting in different mass-transport mechanisms are the main physical reasons for the failure. © 2010 American Institute of Physics.||Source Title:||Journal of Applied Physics||URI:||http://scholarbank.nus.edu.sg/handle/10635/82792||ISSN:||00218979||DOI:||10.1063/1.3463380|
|Appears in Collections:||Staff Publications|
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