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Neutron Scattering Study Of Antiferromagnetic Correlations In The Zn-Mg-Ho Icosahedral Quasicrystal

Published online by Cambridge University Press:  10 February 2011

Taku J. Sato ,
Hiroyuki Takakura ,
An Pang Tsai ,
Kaoru Shibata ,
Kenji Ohoyama  and
Ken H. Andersen
Taku J. Sato
Affiliation:
National Research Institute for Metals, Tsukuba 305–0047, Japan
Hiroyuki Takakura
Affiliation:
National Research Institute for Metals, Tsukuba 305–0047, Japan CREST, Japan Science and Technology Corporation, Kawaguchi, Saitama, Japan
An Pang Tsai
Affiliation:
National Research Institute for Metals, Tsukuba 305–0047, Japan
Kaoru Shibata
Affiliation:
Institute for Materials Research, Tohoku University, Sendai, Japan
Kenji Ohoyama
Affiliation:
Institute for Materials Research, Tohoku University, Sendai, Japan
Ken H. Andersen
Affiliation:
Institute Laue Langevin, Grenoble, France
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Abstract

Magnetism in the Zn-Mg-Ho icosahedral quasicrystal has been studied by neutron scattering. Powder samples of the icosahedral and related crystalline phases were reexamined to clarify the origin of the previously-reported long-range magnetic order [Charrier et al., Phys. Rev. Lett. 78 (1997) 4637]. The long range order was found to originate from the related crystalline phase, which is a contaminant in the previously-used samples. Whereas for high-quality icosahedral phase, we could detect only magnetic diffuse scattering. This apparently shows the absence of the long range order in the icosahedral phase. The diffuse scattering was studied in detail by using a single quasicrystalline sample. It was found that the diffuse scattering appears as satellites from intense nuclear Bragg reflections. This indicates that corresponding spin correlations can be regarded as developed between spins on the six-dimensional virtual hypercubic lattice. A magnetic modulation vector for the correlations is proposed.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 553: Symposium LL – Quasicrystals , 1998 , 415
Copyright
Copyright © Materials Research Society 1999

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References

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