Effect of MgO barriers on ferromagnetic metallic layers studied by polarized neutron reflectivity

J. B. Laloë; A. Ionescu; S. Easton; N. J. Steinke; T. J. Hayward; H. Kurebayashi; J. A.C. Bland; T. R. Charlton; R. M. Dalgliesh; S. Langridge

doi:10.1063/1.2957028

Effect of MgO barriers on ferromagnetic metallic layers studied by polarized neutron reflectivity

J. B. Laloë, A. Ionescu, S. Easton, N. J. Steinke, T. J. Hayward, H. Kurebayashi, J. A.C. Bland, T. R. Charlton, R. M. Dalgliesh, S. Langridge

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Abstract

The effect of MgO tunnel barriers on the magnetic moment of ultrathin magnetic Fe and Co layers is studied by polarized neutron reflectivity. The MgO barriers were grown by molecular beam epitaxy using either direct evaporation from a source crystal or evaporation of Mg in an oxygen background atmosphere. A decrease of the magnetic moment is observed for both Fe and Co, and atomic intermixing of 1.5-3.5 ML at interfaces between the Fe, Co, and MgO is determined. Evaporation from a MgO source crystal yields a tunnel layer which displays better stoichiometry and epitaxy than is obtained using the other growth method.

Original language	English
Article number	012505
Journal	Applied Physics Letters
Volume	93
Issue number	1
DOIs	https://doi.org/10.1063/1.2957028
State	Published - 2008
Externally published	Yes

Funding

This work was supported by the EPSRC (U.K.).

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10.1063/1.2957028

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title = "Effect of MgO barriers on ferromagnetic metallic layers studied by polarized neutron reflectivity",

abstract = "The effect of MgO tunnel barriers on the magnetic moment of ultrathin magnetic Fe and Co layers is studied by polarized neutron reflectivity. The MgO barriers were grown by molecular beam epitaxy using either direct evaporation from a source crystal or evaporation of Mg in an oxygen background atmosphere. A decrease of the magnetic moment is observed for both Fe and Co, and atomic intermixing of 1.5-3.5 ML at interfaces between the Fe, Co, and MgO is determined. Evaporation from a MgO source crystal yields a tunnel layer which displays better stoichiometry and epitaxy than is obtained using the other growth method.",

author = "Lalo{\"e}, {J. B.} and A. Ionescu and S. Easton and Steinke, {N. J.} and Hayward, {T. J.} and H. Kurebayashi and Bland, {J. A.C.} and Charlton, {T. R.} and Dalgliesh, {R. M.} and S. Langridge",

year = "2008",

doi = "10.1063/1.2957028",

language = "English",

volume = "93",

journal = "Applied Physics Letters",

issn = "0003-6951",

publisher = "American Institute of Physics",

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TY - JOUR

T1 - Effect of MgO barriers on ferromagnetic metallic layers studied by polarized neutron reflectivity

AU - Laloë, J. B.

AU - Ionescu, A.

AU - Easton, S.

AU - Steinke, N. J.

AU - Hayward, T. J.

AU - Kurebayashi, H.

AU - Bland, J. A.C.

AU - Charlton, T. R.

AU - Dalgliesh, R. M.

AU - Langridge, S.

PY - 2008

Y1 - 2008

N2 - The effect of MgO tunnel barriers on the magnetic moment of ultrathin magnetic Fe and Co layers is studied by polarized neutron reflectivity. The MgO barriers were grown by molecular beam epitaxy using either direct evaporation from a source crystal or evaporation of Mg in an oxygen background atmosphere. A decrease of the magnetic moment is observed for both Fe and Co, and atomic intermixing of 1.5-3.5 ML at interfaces between the Fe, Co, and MgO is determined. Evaporation from a MgO source crystal yields a tunnel layer which displays better stoichiometry and epitaxy than is obtained using the other growth method.

AB - The effect of MgO tunnel barriers on the magnetic moment of ultrathin magnetic Fe and Co layers is studied by polarized neutron reflectivity. The MgO barriers were grown by molecular beam epitaxy using either direct evaporation from a source crystal or evaporation of Mg in an oxygen background atmosphere. A decrease of the magnetic moment is observed for both Fe and Co, and atomic intermixing of 1.5-3.5 ML at interfaces between the Fe, Co, and MgO is determined. Evaporation from a MgO source crystal yields a tunnel layer which displays better stoichiometry and epitaxy than is obtained using the other growth method.

UR - http://www.scopus.com/inward/record.url?scp=47249149230&partnerID=8YFLogxK

U2 - 10.1063/1.2957028

DO - 10.1063/1.2957028

M3 - Article

AN - SCOPUS:47249149230

SN - 0003-6951

VL - 93

JO - Applied Physics Letters

JF - Applied Physics Letters

IS - 1

M1 - 012505

ER -

Effect of MgO barriers on ferromagnetic metallic layers studied by polarized neutron reflectivity

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