Uniaxial negative thermal expansion in an orthorhombic superconductor CoZr3

Hiroto Arima; Tatsuki Inui; Aichi Yamashita; Akira Miura; Hiroaki Itou; Chikako Moriyoshi; Hiroshi Fujihisa; Yoshikazu Mizuguchi

doi:10.7566/jpsj.92.024602

arXiv · 2211.13947

Uniaxial negative thermal expansion in an orthorhombic superconductor CoZr3

Hiroto Arima·Tatsuki Inui·Aichi Yamashita·Akira Miura·Hiroaki Itou·Chikako Moriyoshi·Hiroshi Fujihisa·Yoshikazu Mizuguchi

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Abstract

We investigated the temperature evolution of crystal structure of orthorhombic CoZr3, which is a superconductor with a transition temperature of 4.3 K, by synchrotron and laboratory (CuK{\alpha}) X-ray diffraction. Uniaxial negative thermal expansion along the c-axis, which is similar to that observed in tetragonal CoZr2, has been observed at a wide temperature range of T = 90-800 K in CoZr3, while a-and b-axis exhibit positive thermal expansion.

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Hiroto Arima, Tatsuki Inui, Aichi Yamashita, Akira Miura, Hiroaki Itou, Chikako Moriyoshi, Hiroshi Fujihisa, Yoshikazu Mizuguchi. 2022-11-25. Uniaxial negative thermal expansion in an orthorhombic superconductor CoZr3. https://doi.org/10.7566/jpsj.92.024602

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