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Structural Evolution of Ni/Au Contact on GaN(0001)

Published online by Cambridge University Press:  17 March 2011

Chong Cook Kim ,
Jong Kyu Kim ,
Jong-Lam Lee ,
Min-Su Yi ,
Jin-Woo Kim ,
Do Young Noh ,
Yeukuang Hwu ,
Pierre Ruterana  and
Jung Ho Je
Chong Cook Kim
Affiliation:
Department of Materials Science and Engineering, Pohang University of Science and Technology, Pohang, Korea
Jong Kyu Kim
Affiliation:
Department of Materials Science and Engineering, Pohang University of Science and Technology, Pohang, Korea
Jong-Lam Lee
Affiliation:
Department of Materials Science and Engineering, Pohang University of Science and Technology, Pohang, Korea
Min-Su Yi
Affiliation:
Department of Materials Science and Engineering and Center for Electronic Materials Research, Kwangju Institute of Science and Technology, Kwangju, Korea
Jin-Woo Kim
Affiliation:
Department of Materials Science and Engineering and Center for Electronic Materials Research, Kwangju Institute of Science and Technology, Kwangju, Korea
Do Young Noh
Affiliation:
Department of Materials Science and Engineering and Center for Electronic Materials Research, Kwangju Institute of Science and Technology, Kwangju, Korea
Yeukuang Hwu
Affiliation:
Institute of Physics, Academia Sinica, Nankang, Taipei 11529, Taiwan, Republic of China
Pierre Ruterana
Affiliation:
Equipe Structure et Comportement Thermomécanique des Matériaux (CRISMAT UMR 6508 CNRS), ISMRA 6, Bd Maréchal Juin, Caen Cedex F-14050, France
Jung Ho Je
Affiliation:
Department of Materials Science and Engineering, Pohang University of Science and Technology, Pohang, Korea
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Abstract

We investigated the structural behavior of the Ni/Au contact on GaN(000l) during annealing in N2, using in-situ x-ray diffraction, anomalous x-ray scattering, and high resolution electron microscopy. Thermally activated atomic mobility caused the two metal atoms, Au and Ni, to interdiffuse during annealing and form solid solutions. At temperature higher than 500°C, GaN decomposition and reactions occurred mostly along GaN dislocations. By decomposed nitrogen reacted with Ni, interestingly, epitaxial Ni4N phase was formed. The epitaxial relationship of the Ni4N, Au, and Ni was identified as M(111)//GaN(0002) and M[0 1 1]//GaN[0211] (M= Ni4N, Au, and Ni).

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 639: Symposium G – GaN and Related Alloys-2000 , 2000 , G11.7
Copyright
Copyright © Materials Research Society 2001

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