Temperature and pressure are essential parameters in the synthesis, evaluation, and application of functional materials. This study proposes the addition of a heating function to a high-pressure diamond anvil cell (DAC) with in situ measurement probes. The proposed DAC allows for simultaneous control of temperature and pressure within the sample space and can be used to synthesize functional materials under extreme conditions. The various components, namely, the heater, thermometer, and measurement probes, were fabricated with a boron-doped diamond epitaxial film and could be repeatedly used. The developed DAC was used to conduct the high-pressure annealing of a La(O,F)BiS2 single crystal and the high-pressure synthesis of EuFBiS2 superconductors. The proposed technique shows promise for further exploration of superconductors to broaden the research field.

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