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Thin film nanocalorimeter for heat capacity measurements of 30 nm films

Journal Article · · Review of Scientific Instruments
DOI:https://doi.org/10.1063/1.3142463· OSTI ID:1511313
 [1];  [1]
  1. Univ. of California, Berkeley, CA (United States). Dept. of Physics
A silicon nitride membrane-based nanocalorimeter is described for measuring the heat capacity of 30 nm films from 300 mK to 800 K and in high magnetic fields with absolute accuracy ∼2%. The addenda heat capacity of the nanocalorimeter is less than 2 × 10-7 J/K at room temperature and 2 × 10-10 J/K at 2.3 K. This is more than ten times smaller than any existing calorimeter suitable for measuring thin films over this wide temperature range. The heat capacities of thin Cu and Au films are reported and agree with bulk values. The thermal conductivity of the thin low stress silicon nitride is substantially smaller than thicker membranes while the specific heat is enhanced below 20 K. Lastly, design of the nanocalorimeter will be discussed along with fabrication details and calibration results.
Research Organization:
Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22). Materials Sciences & Engineering Division
Grant/Contract Number:
AC02-05CH11231
OSTI ID:
1511313
Journal Information:
Review of Scientific Instruments, Journal Name: Review of Scientific Instruments Journal Issue: 6 Vol. 80; ISSN 0034-6748
Publisher:
American Institute of Physics (AIP)Copyright Statement
Country of Publication:
United States
Language:
English

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Heat transfer simulation and thermal measurements of microfabricated x-ray transparent heater stages journal September 2011
Differential membrane-based nanocalorimeter for high-resolution measurements of low-temperature specific heat journal May 2012
Thermomechanical response of a semicrystalline polymer in the vicinity of the melting by using microcantilever technology journal June 2014
Tutorial: Time-domain thermoreflectance (TDTR) for thermal property characterization of bulk and thin film materials journal October 2018
Nanocalorimetry: Exploring materials faster and smaller journal September 2019
Ultrafast demagnetization of L1 0 FePt and FePd ordered alloys journal December 2015
Thermal transport in amorphous materials: a review journal October 2016
Electronic transport in doped SrTiO 3 : Conduction mechanisms and potential applications journal April 2010
Heat transport by long mean free path vibrations in amorphous silicon nitride near room temperature journal June 2013
Phonon scattering in strained transition layers for GaN heteroepitaxy journal March 2014
Thermal and electrical conductivity of approximately 100-nm permalloy, Ni, Co, Al, and Cu films and examination of the Wiedemann-Franz Law journal December 2015
Thermodynamic Measurements of Fe-Rh Alloys journal December 2012
Excess Specific Heat in Evaporated Amorphous Silicon journal March 2013

Figures / Tables (7)


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