title: In-situX-ray diffraction combined with scanning AC nanocalorimetry applied to a Fe0.84Ni0.16thin-film sample.
abstract: 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 duringin-situoperation of these devices using synchrotron radiation provide unprecedented characterization of thermal and structural material properties. We apply this technique to a Fe0.84Ni0.16thin-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.
authors.affiliation: Joint Center for Artificial Photosynthesis, California Institute of Technology, 1200 E. California Blvd., Pasadena, California 91125, USA.
authors.forename: John M
authors.initials: JM
authors.lastname: Gregoire
authors.forename: Kechao
authors.initials: K
authors.lastname: Xiao
authors.forename: Patrick J
authors.initials: PJ
authors.lastname: McCluskey
authors.forename: Darren
authors.initials: D
authors.lastname: Dale
authors.forename: Gayatri
authors.initials: G
authors.lastname: Cuddalorepatta
authors.forename: Joost J
authors.initials: JJ
authors.lastname: Vlassak