Dr. Masaki Azuma and Dr. Hena Das (Laboratory for Materials and Structures)

A formerly unnoticed monoclinic distortion in Ca2RuO4 explains its enormous negative thermal expansion (NTE) over a wide range of temperatures, discover researchers from Tokyo Tech. The work promises a different route for the design of unconventional NTE materials, with applications in engines, thermal barrier ceramics, and precision instruments, among other things.

Title of original paper: “Origin and absence of giant negative thermal expansion in reduced and oxidized Ca₂RuO₄“

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