Mn diffusion and the thermal stability of tunneling spin polarization

P.V. Paluskar; C.H. Kant; J.T. Kohlhepp; A.T. Filip; H.J.M. Swagten; B. Koopmans; W.J.M. Jonge, de

doi:10.1063/1.1856291

Mn diffusion and the thermal stability of tunneling spin polarization

P.V. Paluskar
, C.H. Kant
, J.T. Kohlhepp
, A.T. Filip
, H.J.M. Swagten
, B. Koopmans
, W.J.M. Jonge, de

Physics of Nanostructures

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

11 Citations (Scopus)

239 Downloads (Pure)

Abstract

We examine the role of Mn diffusion in the thermal stability of tunneling spin polarization P by directly measuring P of Al/AlOx/Co/FeMn and Al/AlOx/Co90Fe10/FeMn junctions using superconducting tunneling spectroscopy (STS). We confirm Mn diffusion in our junctions using x-ray photoelectron spectroscopy after an ultrahigh vacuum 500 °C anneal. Surprisingly, and in contrast to the current belief, no drop in P is observed using STS. Therefore, though Mn diffuses significantly, it cannot be solely responsible for the drop in tunneling magnetoresistance observed after postdeposition anneals above 300 °C. ©2005 American Institute of Physics

Original language	English
Article number	10C925
Pages (from-to)	10C925-1/3
Journal	Journal of Applied Physics
Volume	97
Issue number	10, Pt. 2
DOIs	https://doi.org/10.1063/1.1856291
Publication status	Published - 2005

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title = "Mn diffusion and the thermal stability of tunneling spin polarization",

abstract = "We examine the role of Mn diffusion in the thermal stability of tunneling spin polarization P by directly measuring P of Al/AlOx/Co/FeMn and Al/AlOx/Co90Fe10/FeMn junctions using superconducting tunneling spectroscopy (STS). We confirm Mn diffusion in our junctions using x-ray photoelectron spectroscopy after an ultrahigh vacuum 500 °C anneal. Surprisingly, and in contrast to the current belief, no drop in P is observed using STS. Therefore, though Mn diffuses significantly, it cannot be solely responsible for the drop in tunneling magnetoresistance observed after postdeposition anneals above 300 °C. {\textcopyright}2005 American Institute of Physics",

author = "P.V. Paluskar and C.H. Kant and J.T. Kohlhepp and A.T. Filip and H.J.M. Swagten and B. Koopmans and \{Jonge, de\}, W.J.M.",

year = "2005",

doi = "10.1063/1.1856291",

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T1 - Mn diffusion and the thermal stability of tunneling spin polarization

AU - Paluskar, P.V.

AU - Kant, C.H.

AU - Kohlhepp, J.T.

AU - Filip, A.T.

AU - Swagten, H.J.M.

AU - Koopmans, B.

AU - Jonge, de, W.J.M.

PY - 2005

Y1 - 2005

N2 - We examine the role of Mn diffusion in the thermal stability of tunneling spin polarization P by directly measuring P of Al/AlOx/Co/FeMn and Al/AlOx/Co90Fe10/FeMn junctions using superconducting tunneling spectroscopy (STS). We confirm Mn diffusion in our junctions using x-ray photoelectron spectroscopy after an ultrahigh vacuum 500 °C anneal. Surprisingly, and in contrast to the current belief, no drop in P is observed using STS. Therefore, though Mn diffuses significantly, it cannot be solely responsible for the drop in tunneling magnetoresistance observed after postdeposition anneals above 300 °C. ©2005 American Institute of Physics

AB - We examine the role of Mn diffusion in the thermal stability of tunneling spin polarization P by directly measuring P of Al/AlOx/Co/FeMn and Al/AlOx/Co90Fe10/FeMn junctions using superconducting tunneling spectroscopy (STS). We confirm Mn diffusion in our junctions using x-ray photoelectron spectroscopy after an ultrahigh vacuum 500 °C anneal. Surprisingly, and in contrast to the current belief, no drop in P is observed using STS. Therefore, though Mn diffuses significantly, it cannot be solely responsible for the drop in tunneling magnetoresistance observed after postdeposition anneals above 300 °C. ©2005 American Institute of Physics

U2 - 10.1063/1.1856291

DO - 10.1063/1.1856291

M3 - Article

SN - 0021-8979

VL - 97

SP - 10C925-1/3

JO - Journal of Applied Physics

JF - Journal of Applied Physics

IS - 10, Pt. 2

M1 - 10C925

ER -

Mn diffusion and the thermal stability of tunneling spin polarization

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