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Frances HELLOGO.GIFellman Group
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Calorimetry

This is one of the only labs in the world with the unique capability to perform heat capacity and thermodynamic measurements on thin film samples. We fabricate membrane-based thermal isolation nanocalorimeter devices in order to take these measurements. In addition to measuring amorphous samples, we have developed the capability to grow epitaxial samples on the membranes of the devices using ion beam assisted deposition (IBAD) MgO.

Current nanocalorimetry research involves measuring the magnetocaloric effect of magnetic thin film materials. The materials being studied exhibit a giant magnetocaloric effect due to their magnetic phase transitions. Calorimetry is the only measurement technique that can fully characterize a material's magnetocaloric behavior, and few other labs are equipped to take these measurements. Harnessing the magnetocaloric effect at phase transitions can advance magnetic cooling technology applications.


Thin film microcalorimeter

Microcalorimeter device