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2008 | 113 | 1 | 335-338
Article title

Isostructural Transition in RTAl Compounds at High Temperatures

Content
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Languages of publication
EN
Abstracts
EN
Based on previously discovered forbidden values of the c/a ratio, we studied anomalies in the temperature evolution of the lattice parameters (a, c) of several hexagonal RTAl compounds at high temperatures (above room temperature). The compound ErNi_{0.45}Cu_{0.55}Al, that seemed to be impossible to be prepared in single-phase form, reaches the single-phase state at temperatures above 493 K (220°C). On the other hand, the compound TbNi_{0.7}Cu_{0.3}Al - that was expected to undergo a first-order structural phase transition at high temperatures - exhibits a second-order type transition when approaching the critical values of the c/a ratio. These results are in agreement with idea of a forbidden range of c/a values in these compounds.
Keywords
EN
Publisher

Year
Volume
113
Issue
1
Pages
335-338
Physical description
Dates
published
2008-01
received
2007-07-09
Contributors
author
  • Charles University, Faculty of Mathematics and Physics, DCMP, Ke Karlovu 5, 121 16 Prague 2, Czech Republic
author
  • Charles University, Faculty of Mathematics and Physics, DCMP, Ke Karlovu 5, 121 16 Prague 2, Czech Republic
author
  • Universiteit van Amsterdam, Van der Waals-Zeeman Instituut, Valckenierstraat 65, 1018 XE Amsterdam, The Netherlands
author
  • Universiteit van Amsterdam, Van der Waals-Zeeman Instituut, Valckenierstraat 65, 1018 XE Amsterdam, The Netherlands
References
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  • 5. J. Prchal, P. Javorský, V. Sechovský, M. Dopita, O. Isnard, K. Jurek, J. Magn. Magn. Mater. 283, 34 (2004)
  • 6. J. Prchal, P. Javorský, S. Daniš, K. Jurek, J. Dlouhý, Czech. J. Phys. , 54 (20 suppl. D, 315) 04
  • 7. J. Rodriguez-Carvajal, Physica B 192, 55 (1993)
  • 8. G. Ehlers, Ph.D. Thesis, Berlin 1997
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Document Type
Publication order reference
Identifiers
YADDA identifier
bwmeta1.element.bwnjournal-article-appv113n1082kz
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