Journal
APPLIED PHYSICS LETTERS
Volume 102, Issue 20, Pages -Publisher
AMER INST PHYSICS
DOI: 10.1063/1.4806972
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Funding
- Materials Research Science and Engineering Center at Harvard University [NSF-DMR-0820484]
- Air Force Office of Scientific Research [FA9550-12-1-0098]
- DOE Office of Basics Energy Sciences [DE-SC-0004889]
- NIH/NIGMS via NSF [DMR-0936384]
- Center for Nanoscale Systems at Harvard University [NSF-ECS-0335765]
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We combine the characterization techniques of scanning AC nanocalorimetry and x-ray diffraction to study phase transformations in complex materials system. Micromachined nanocalorimeters have excellent performance for high-temperature and high-scanning-rate calorimetry measurements. Time-resolved X-ray diffraction measurements during in-situ operation of these devices using synchrotron radiation provide unprecedented characterization of thermal and structural material properties. We apply this technique to a Fe0.84Ni0.16 thin-film sample that exhibits a martensitic transformation with over 350 K hysteresis, using an average heating rate of 85 K/s and cooling rate of 275 K/s. The apparatus includes an array of nanocalorimeters in an architecture designed for combinatorial studies. (C) 2013 AIP Publishing LLC.
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