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Title: Comparative study of the binary icosahedral quasicrystal Cd{sub 5.7}Yb and its crystalline 1/1-approximant Cd{sub 6}Yb by positron annihilation spectroscopy

Abstract

Previously, we showed that the icosahedral quasicrystal Cd{sub 5.7}Yb possesses similar structural vacancies to those in its cubic 1/1-approximant Cd{sub 6}Yb by positron lifetime measurements [K. Sato, H. Uchiyama, K. Arinuma, I. Kanazawa, R. Tamura, T. Shibuya, and S. Takeuchi, Phys. Rev. B 66, 052201 (2002)]. In the present paper, the local chemical environment around the structural vacancies is specifically investigated by two-detector coincident Doppler broadening spectroscopy. Essentially the same annihilation sites with Cd-rich chemical environments are identified for the two phases. This strongly suggests that the quasicrystal is composed of the same cluster as the approximant. The difference in the structural vacancy density between the two phases is examined by positron diffusion experiments using a slow positron beam. The structural vacancy density in the quasicrystal is found to be 20% lower than that in the approximant.

Authors:
; ; ; ; ; ;  [1]
  1. National Institute of Advanced Industrial Science and Technology (AIST), 1-1-1 Higashi, Tsukuba, Ibaraki 305-8565 (Japan)
Publication Date:
OSTI Identifier:
20664882
Resource Type:
Journal Article
Journal Name:
Physical Review. B, Condensed Matter and Materials Physics
Additional Journal Information:
Journal Volume: 70; Journal Issue: 9; Other Information: DOI: 10.1103/PhysRevB.70.094107; (c) 2004 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 1098-0121
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; 36 MATERIALS SCIENCE; ANNIHILATION; CADMIUM ALLOYS; DOPPLER BROADENING; POSITRON BEAMS; POSITRONS; SPECTROSCOPY; VACANCIES; YTTERBIUM ALLOYS

Citation Formats

Sato, K, Kobayashi, Y, Arinuma, K, Kanazawa, I, Tamura, R, Shibuya, T, Takeuchi, S, Department of Physics, Tokyo Gakugei University, 4-1-1 Koganei, Tokyo 184-8501, and Department of Materials Science and Technology, Tokyo University of Science, Noda, Chiba 278-8501. Comparative study of the binary icosahedral quasicrystal Cd{sub 5.7}Yb and its crystalline 1/1-approximant Cd{sub 6}Yb by positron annihilation spectroscopy. United States: N. p., 2004. Web. doi:10.1103/PhysRevB.70.094107.
Sato, K, Kobayashi, Y, Arinuma, K, Kanazawa, I, Tamura, R, Shibuya, T, Takeuchi, S, Department of Physics, Tokyo Gakugei University, 4-1-1 Koganei, Tokyo 184-8501, & Department of Materials Science and Technology, Tokyo University of Science, Noda, Chiba 278-8501. Comparative study of the binary icosahedral quasicrystal Cd{sub 5.7}Yb and its crystalline 1/1-approximant Cd{sub 6}Yb by positron annihilation spectroscopy. United States. https://doi.org/10.1103/PhysRevB.70.094107
Sato, K, Kobayashi, Y, Arinuma, K, Kanazawa, I, Tamura, R, Shibuya, T, Takeuchi, S, Department of Physics, Tokyo Gakugei University, 4-1-1 Koganei, Tokyo 184-8501, and Department of Materials Science and Technology, Tokyo University of Science, Noda, Chiba 278-8501. Wed . "Comparative study of the binary icosahedral quasicrystal Cd{sub 5.7}Yb and its crystalline 1/1-approximant Cd{sub 6}Yb by positron annihilation spectroscopy". United States. https://doi.org/10.1103/PhysRevB.70.094107.
@article{osti_20664882,
title = {Comparative study of the binary icosahedral quasicrystal Cd{sub 5.7}Yb and its crystalline 1/1-approximant Cd{sub 6}Yb by positron annihilation spectroscopy},
author = {Sato, K and Kobayashi, Y and Arinuma, K and Kanazawa, I and Tamura, R and Shibuya, T and Takeuchi, S and Department of Physics, Tokyo Gakugei University, 4-1-1 Koganei, Tokyo 184-8501 and Department of Materials Science and Technology, Tokyo University of Science, Noda, Chiba 278-8501},
abstractNote = {Previously, we showed that the icosahedral quasicrystal Cd{sub 5.7}Yb possesses similar structural vacancies to those in its cubic 1/1-approximant Cd{sub 6}Yb by positron lifetime measurements [K. Sato, H. Uchiyama, K. Arinuma, I. Kanazawa, R. Tamura, T. Shibuya, and S. Takeuchi, Phys. Rev. B 66, 052201 (2002)]. In the present paper, the local chemical environment around the structural vacancies is specifically investigated by two-detector coincident Doppler broadening spectroscopy. Essentially the same annihilation sites with Cd-rich chemical environments are identified for the two phases. This strongly suggests that the quasicrystal is composed of the same cluster as the approximant. The difference in the structural vacancy density between the two phases is examined by positron diffusion experiments using a slow positron beam. The structural vacancy density in the quasicrystal is found to be 20% lower than that in the approximant.},
doi = {10.1103/PhysRevB.70.094107},
url = {https://www.osti.gov/biblio/20664882}, journal = {Physical Review. B, Condensed Matter and Materials Physics},
issn = {1098-0121},
number = 9,
volume = 70,
place = {United States},
year = {2004},
month = {9}
}