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J. Phys. Soc. Jpn. 81 (2012) 024720 (10 pages)  |Previous Article| |Next Article|  |Table of Contents|
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Electrical and Magnetic Properties of Quasicrystal Approximants RCd6 (R: Rare Earth)

Akinobu Mori1, Hisashi Ota1, Shingo Yoshiuchi1, Ken Iwakawa1, Yuki Taga1, Yusuke Hirose1, Tetsuya Takeuchi2, Etsuji Yamamoto3, Yoshinori Haga3, Fuminori Honda1, Rikio Settai1, and Yoshichika Ōnuki1,3

1Graduate School of Science, Osaka University, Toyonaka, Osaka 560-0043, Japan
2Low Temperature Center, Osaka University, Toyonaka, Osaka 560-0043, Japan
3Advanced Science Research Center, Japan Atomic Energy Agency, Tokai, Ibaraki 319-1195, Japan

(Received August 9, 2011; Accepted November 28, 2011; Published February 1, 2012)

We measured the electrical resistivity, magnetic susceptibility, magnetization, and specific heat of the quasicrystal approximants RCd6 (R: rare earth, Y–Lu) with a body-centered cubic (bcc) crystal structure. Single crystals were grown by the Cd-self flux method and annealing method. We confirmed that the structural order–disorder transition is realized at about 160 K when the lattice constant a is larger than 15.481 Å in YCd6, namely, for R = Pr, Nd, Sm, Gd, Tb, Dy, and Yb. At lower temperatures, RCd6 compounds, except non-4f reference compounds YCd6 and LuCd6, and a divalent compound YbCd6, are found to order antiferromagnetically. We clarified that the structural order–disorder transition has a great influence on the magnetic ordering and transport properties. The Néel temperature of RCd6 (R: Nd, Sm, Tb, and Dy) with the structural order–disorder transition is appreciably higher than the de Gennes scaling normalized by the Néel temperature of GdCd6, while the the Néel temperature of RCd6 (R: Ho, Er, and Tm) without the structural transition approximately follows the de Gennes scaling. Moreover, the electrical resistivity of RCd6 with the structural transition decreases monotonically below the Néel temperature, while it increases below the Néel temperature and a large residual resistivity remains at low temperatures in RCd6 without the structural transition. The contribution of an Einstein oscillator to the phonon specific heat is also discussed in YCd6 and LuCd6. ©2012 The Physical Society of Japan

URL: http://jpsj.ipap.jp/link?JPSJ/81/024720/
DOI: 10.1143/JPSJ.81.024720


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References | Citing Articles (3)

  1. A. P. Tsai, J. Q. Guo, E. Abe, H. Takakura, and T. J. Sato: Nature 408 (2000) 537.
  2. R. Tamura, K. Edagawa, C. Aoki, S. Takeuchi, and K. Suzuki: Phys. Rev. B 68 (2003) 174105[APS].
  3. S. K. Dhar, A. Palenzona, P. Manfrinetti, and S. M. Pattalwar: J. Phys.: Condens. Matter 14 (2002) 517[IoP STACKS].
  4. R. Tamura, K. Edagawa, C. Aoki, S. Takeuchi, and K. Suzuki: J. Alloys Compd. 378 (2004) 290.
  5. R. Tamura, K. Edagawa, Y. Murao, S. Takeuchi, K. Suzuki, M. Ichihara, M. Isobe, and Y. Ueda: J. Non-Cryst. Solids 334–335 (2004) 173[CrossRef].
  6. T. Watanuki, A. Machida, T. Ikeda, K. Aoki, H. Kaneko, T. Shobu, T. J. Sato, and A. P. Tsai: Phys. Rev. Lett. 96 (2006) 105702[APS].
  7. K. Nishimoto, T. Sato, M. Muraki, and R. Tamura: Philos. Mag. 91 (2011) 2587.
  8. R. Tamura, Y. Muro, T. Hiroto, K. Nishimoto, and T. Takabatake: Phys. Rev. B 82 (2010) 220201[APS](R).
  9. Y. Ōnuki and A. Hasegawa: in Handbook on the Physics and Chemistry of Rare Earths, ed. K. A. Gschneidner, Jr. and L. Eyring (Elsevier, Amsterdam, 1995) Vol. 20, p. 6.
  10. T. B. Massalski: in Binary Alloy Phase Diagrams, II Ed., ed. T. B. Massalski (ASM International, Materials Park, OH, 1990).
  11. S. Yoshiuchi, T. Takeuchi, M. Ohya, K. Katayama, M. Matsushita, N. Yoshitani, N. Nishimura, H. Ota, N. Tateiwa, E. Yamamoto, Y. Haga, H. Yamagami, F. Honda, R. Settai, and Y. Ōnuki: J. Phys. Soc. Jpn. 79 (2010) 044601[JPSJ].
  12. M. Armbrüster and S. Lindin: J. Alloys Compd. 307 (2000) 141.
  13. C. P. Gomés and S. Lindin: Chem.–Eur. J. 10 (2004) 3279.
  14. C. P. Gomés and S. Lindin: Phys. Rev. B 68 (2003) 024203[APS].
  15. V. Keppens, D. Mandrus, B. C. Sales, B. C. Chakoumakos, P. Dai, R. Coldea, M. B. Maple, D. A. Gajewski, E. J. Freeman, and S. Bennington: Nature 395 (1998) 876[CrossRef].
  16. T. Takabatake, E. Matsuoka, S. Narazu, K. Hayashi, S. Morimoto, T. Sasakawa, K. Umeo, and M. Sera: Physica B 383 (2006) 93[CrossRef].
  17. K. Matsuhira, C. Sekine, M. Wakeshima, Y. Hinatsu, T. Namiki, K. Takeda, I. Shirotani, H. Sugawara, D. Kikuchi, and H. Sato: J. Phys. Soc. Jpn. 78 (2009) 124601[JPSJ].
  18. K. Iwasa, Y. Mori, L. Hao, Y. Murakami, M. Kohgi, H. Sugawara, and H. Sato: J. Phys.: Conf. Ser. 92 (2007) 12122[IoP STACKS].
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