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MEMS Based High Sensitivity Calorimetry

[+] Author Affiliations
Shu Zhang, Yizhang Yang, Katayun Barmak, Yoed Rabin, Mehdi Asheghi

Carnegie Mellon University

Paper No. IMECE2004-62332, pp. 343-345; 3 pages
doi:10.1115/IMECE2004-62332
From:
  • ASME 2004 International Mechanical Engineering Congress and Exposition
  • Heat Transfer, Volume 3
  • Anaheim, California, USA, November 13 – 19, 2004
  • Conference Sponsors: Heat Transfer Division
  • ISBN: 0-7918-4711-X | eISBN: 0-7918-4178-2, 0-7918-4179-0, 0-7918-4180-4
  • Copyright © 2004 by ASME

abstract

The fundamental study of phase transformations continues to be a key for successful implementation of metals and alloys in micro- and nano-scale structures in integrated circuitry and magnetic recording devices and systems. The thermodynamic and thermokinetic properties of extremely thin layers can be altered due to the relative effect of boundaries and interfaces on the volume of the material. Calorimetry at the nano-scale requires measurement sensitivity on the order of 1 nJ or better, which requires improved thermal design, development of thermal modeling, and development of experimental measurement techniques. In this report, the specific heat of 144 nm thick CoFe layer is measured, using frequency-domain Joule heating and thermometry (3ω-technique), on Cu/SiO2 and Cu/SiO2 /CoFe suspended bridges. Analyses of the heat transfer in suspended structures are performed to establish guidelines for design and fabrication of small-scale differential scanning calorimeters.

Copyright © 2004 by ASME

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