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

Yukio Yoshimura; Ken-ichi Tozaki; Akira Kojima; Hiroshi Iwasaki

doi:10.1117/12.432773

11 July 2001 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

Yukio Yoshimura, Ken-ichi Tozaki, Akira Kojima, Hiroshi Iwasaki

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Proceedings Volume 4333, Smart Structures and Materials 2001: Active Materials: Behavior and Mechanics; (2001) https://doi.org/10.1117/12.432773
Event: SPIE's 8th Annual International Symposium on Smart Structures and Materials, 2001, Newport Beach, CA, United States

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.

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Yukio Yoshimura, Ken-ichi Tozaki, Akira Kojima, and Hiroshi Iwasaki "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", Proc. SPIE 4333, Smart Structures and Materials 2001: Active Materials: Behavior and Mechanics, (11 July 2001); https://doi.org/10.1117/12.432773

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