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Structural and Magnetic Properties of XMnSb/PtMnSb Clb Heusler Alloy Superlattices (X=Ni,Cu)

Published online by Cambridge University Press:  10 February 2011

J.F. Bobo ,
K. Bessho ,
F.B. Mancoff ,
P.R. Johnson ,
M.C. Kautzky ,
R.L. White  and
B.M. Clemens
J.F. Bobo
Affiliation:
Department of Materials Science and Engineering, Stanford University, Stanford, CA, 94305–2205
K. Bessho
Affiliation:
Department of Materials Science and Engineering, Stanford University, Stanford, CA, 94305–2205
F.B. Mancoff
Affiliation:
Department of Materials Science and Engineering, Stanford University, Stanford, CA, 94305–2205
P.R. Johnson
Affiliation:
Department of Materials Science and Engineering, Stanford University, Stanford, CA, 94305–2205
M.C. Kautzky
Affiliation:
Department of Materials Science and Engineering, Stanford University, Stanford, CA, 94305–2205
R.L. White
Affiliation:
Department of Materials Science and Engineering, Stanford University, Stanford, CA, 94305–2205
B.M. Clemens
Affiliation:
Department of Materials Science and Engineering, Stanford University, Stanford, CA, 94305–2205
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Abstract

We have grown superlattices based on the Clb Heusler alloys PtMnSb, CuMnSb and NiMnSb between 200–500°C on A12O3 (0001). X-ray diffraction (XRD) indicates (111) oriented ordered structures for growth at 300°C. Higher deposition temperature leads to interdiffusion, loss of the multilayer structure and appearance of extra phases. Growth at 200°C slightly reduces the intermixing but also reduces the quality of the crystal structure. For PtMnSb/CuMnSb, we found an enhancement of the saturation magnetization compared to equivalent PtMnSb single layer films and a CuMnSb spacer thickness dependence of the squareness of the M(H) 100ps suggestive of interlayer coupling. Short periodicity NiMnSb/PtMnSb superlattices show an in-plane magnetic easy axis, but correction for shape anisotropy indicates a tendency for perpendicular anisotropy.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 475: Symposium M – Magnetic Ultrathin Films, Multilayers, and Surfaces – 1997 , 1997 , 21
Copyright
Copyright © Materials Research Society 1997

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References

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