Investigation of Temperature-Dependent Properties of BaZrO₃ Single Crystal

The 4d transition metal oxide BaZrO₃ is a perovskite compound which is widely utilized in the commercial industries. Its high proton conductivity enables its use as an electrolyte material for proton-conducting fuel cells. The low dielectric loss also offers advantages for widespread application in wireless communication technologies. Recently, high-quality BaZrO₃ single crystal substrates have been developed, expanding its application as a platform for growing epitaxial thin films and developing new functional oxide films. In this presentation, we introduce our high-quality BaZrO₃ single crystal, grown by the optical floating zone method, and discuss the physical properties of BaZrO₃ single crystal below room temperature.