High resolution structural characterization of giant magnetoresistance structures containing a nano-oxide layer

C. Y. You; A. Cerezo; P. H. Clifton; L. Folks; M. J. Carey; A. K. Petford-Long

doi:10.1063/1.2754364

High resolution structural characterization of giant magnetoresistance structures containing a nano-oxide layer

C. Y. You, A. Cerezo, P. H. Clifton, L. Folks, M. J. Carey, A. K. Petford-Long

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

13 Scopus citations

Abstract

The microstructure and chemistry of a current-perpendicular-to-plane giant magnetoresistance structure containing a nano-oxide layer (NOL) have been studied using a combination of high resolution transmission electron microscopy and three-dimensional atom probe analysis. It was found that the morphology of the NOL changes from a planar layer to discrete particles on annealing, indicating the dominance of surface energy on the morphology evolution. Direct evidence was obtained for significant Mn diffusion from the IrMn antiferromagnetic layer and partitioning to the oxide region during annealing.

Original language	English (US)
Article number	011905
Journal	Applied Physics Letters
Volume	91
Issue number	1
DOIs	https://doi.org/10.1063/1.2754364
State	Published - 2007
Externally published	Yes

ASJC Scopus subject areas

Physics and Astronomy (miscellaneous)

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title = "High resolution structural characterization of giant magnetoresistance structures containing a nano-oxide layer",

abstract = "The microstructure and chemistry of a current-perpendicular-to-plane giant magnetoresistance structure containing a nano-oxide layer (NOL) have been studied using a combination of high resolution transmission electron microscopy and three-dimensional atom probe analysis. It was found that the morphology of the NOL changes from a planar layer to discrete particles on annealing, indicating the dominance of surface energy on the morphology evolution. Direct evidence was obtained for significant Mn diffusion from the IrMn antiferromagnetic layer and partitioning to the oxide region during annealing.",

author = "You, {C. Y.} and A. Cerezo and Clifton, {P. H.} and L. Folks and Carey, {M. J.} and Petford-Long, {A. K.}",

note = "Funding Information: The authors would like to thank S. Pinitsoontorn and T. Godfrey for their assistance with experimental work, and C.R.M. Grovenor for provision of laboratory facilities. This work was funded under the LINK scheme of the Department of Trade and Industry and the Engineering and Physical Sciences Research Council, under Grant No. GR∕S96463∕01. Argonne National Laboratory is supported by the U.S. Department of Energy, Basic Energy Science-Materials Science, under Contract No. W-31-109-ENG-38.",

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doi = "10.1063/1.2754364",

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AU - You, C. Y.

AU - Cerezo, A.

AU - Clifton, P. H.

AU - Folks, L.

AU - Carey, M. J.

AU - Petford-Long, A. K.

N1 - Funding Information: The authors would like to thank S. Pinitsoontorn and T. Godfrey for their assistance with experimental work, and C.R.M. Grovenor for provision of laboratory facilities. This work was funded under the LINK scheme of the Department of Trade and Industry and the Engineering and Physical Sciences Research Council, under Grant No. GR∕S96463∕01. Argonne National Laboratory is supported by the U.S. Department of Energy, Basic Energy Science-Materials Science, under Contract No. W-31-109-ENG-38.

PY - 2007

Y1 - 2007

N2 - The microstructure and chemistry of a current-perpendicular-to-plane giant magnetoresistance structure containing a nano-oxide layer (NOL) have been studied using a combination of high resolution transmission electron microscopy and three-dimensional atom probe analysis. It was found that the morphology of the NOL changes from a planar layer to discrete particles on annealing, indicating the dominance of surface energy on the morphology evolution. Direct evidence was obtained for significant Mn diffusion from the IrMn antiferromagnetic layer and partitioning to the oxide region during annealing.

AB - The microstructure and chemistry of a current-perpendicular-to-plane giant magnetoresistance structure containing a nano-oxide layer (NOL) have been studied using a combination of high resolution transmission electron microscopy and three-dimensional atom probe analysis. It was found that the morphology of the NOL changes from a planar layer to discrete particles on annealing, indicating the dominance of surface energy on the morphology evolution. Direct evidence was obtained for significant Mn diffusion from the IrMn antiferromagnetic layer and partitioning to the oxide region during annealing.

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High resolution structural characterization of giant magnetoresistance structures containing a nano-oxide layer

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