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Proceedings Paper

New interpretation of the phase transition series in CsPbCl3 based on the finding of the multistep cubic-tetragonal structure change by the milli-Kelvin-stabilized cell
Author(s): Yukio Yoshimura; Ken-ichi Tozaki; Akira Kojima; Hiroshi Iwasaki
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Paper Abstract

Phase transitions in CsPbCl3 have been investigated on a single crystal by X-ray precision method at temperatures ranging from 340 to 90 K. On cooling from room temperature, it was found that abrupt intensity increases of superlattice reflections, X; (0,k,1+1/2)c and r;)h+1/2,k+1/2,1+1/2)c in the cubic Brilloun zone, were observed at about 265 K and 200 K, respectively. At 200 K, although accompanied with conspicuous splitting of the hkl Bragg spots along [010]c* direction of the cubic reciprocal lattice, weak spots are still observed without splitting. These observations suggest that the crystal undergoes from the room temperature phase to an intermediate low-temperature phase beginning at 265 K and further transforms at 200 K, successively. Coexistence of a tetragonal and a nonoclinic forms is recognized in the lowest temperature phase below 200 K. The results suggest that a new transition series, 320-265-200 K, starting from the multi-step transition at 320 K exists.

Paper Details

Date Published: 11 July 2001
PDF: 9 pages
Proc. SPIE 4333, Smart Structures and Materials 2001: Active Materials: Behavior and Mechanics, (11 July 2001); doi: 10.1117/12.432773
Show Author Affiliations
Yukio Yoshimura, Ritsumeikan Univ. (Japan)
Ken-ichi Tozaki, Chiba Univ. (Japan)
Akira Kojima, Univ. of Shiga Prefecture (Japan)
Hiroshi Iwasaki, Ritsumeikan Univ. (Japan)

Published in SPIE Proceedings Vol. 4333:
Smart Structures and Materials 2001: Active Materials: Behavior and Mechanics
Christopher S. Lynch, Editor(s)

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