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Title: Membrane-based calorimetry for studies of sub-microgram samples.

Abstract

We have developed a membrane-based microcalorimeter for general measurements of heat capacity and latent heat using a combination of ac steady-state and relaxation methods. The differential calorimeter is designed for sub-microgram samples studied over a wide range of temperatures and magnetic fields. The device is based on free-standing silicon nitride membranes of 150 nm thickness onto which thin film heaters and temperature sensors are fabricated. While production-line fabrication may benefit from back-etching as a final step, it is often easier to start with pre-etched membranes in a research laboratory. With selected nano-fabrication methods this is possible. Due to a robust heater and very low thermal conductance of the final calorimeter, the sample can be heated to more than 100 K above base temperature. This enables instantaneous calibration, and makes the device capable of being used for ultra-fast temperature control, relaxation studies, and measurements that combine good absolute accuracy, high resolution, and information on latent heat.

Authors:
; ; ; ;  [1]
  1. Materials Science Division
Publication Date:
Research Org.:
Argonne National Lab. (ANL), Argonne, IL (United States)
Sponsoring Org.:
USDOE Office of Science (SC); Knut and Alice Wallenberg Foundation; Swiss Research Council
OSTI Identifier:
1011307
Report Number(s):
ANL/MSD/CP-69765
Journal ID: 1742-6596; TRN: US201109%%280
DOE Contract Number:  
DE-AC02-06CH11357
Resource Type:
Conference
Journal Name:
J. Phys.: Conf. Series
Additional Journal Information:
Journal Volume: 150; Journal Issue: Jan. 2009; Conference: 25th International Conferebce on Low Temperature Physics (LT 25); Aug. 6, 2008 - Aug. 13, 2008; Amsterdam, The Netherlands
Country of Publication:
United States
Language:
ENGLISH
Subject:
71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; ACCURACY; CALIBRATION; CALORIMETERS; CALORIMETRY; FABRICATION; HEATERS; MAGNETIC FIELDS; MEMBRANES; PHYSICS; RELAXATION; RESOLUTION; SENSORS; SILICON NITRIDES; SPECIFIC HEAT; TEMPERATURE CONTROL; THICKNESS; THIN FILMS

Citation Formats

Tagliati, S, Rydh, A, Xie, R, Welp, U, Kwok, W K, and Stockholm Univ.). Membrane-based calorimetry for studies of sub-microgram samples.. United States: N. p., 2009. Web. doi:10.1088/1742-6596/150/5/052256.
Tagliati, S, Rydh, A, Xie, R, Welp, U, Kwok, W K, & Stockholm Univ.). Membrane-based calorimetry for studies of sub-microgram samples.. United States. https://doi.org/10.1088/1742-6596/150/5/052256
Tagliati, S, Rydh, A, Xie, R, Welp, U, Kwok, W K, and Stockholm Univ.). 2009. "Membrane-based calorimetry for studies of sub-microgram samples.". United States. https://doi.org/10.1088/1742-6596/150/5/052256.
@article{osti_1011307,
title = {Membrane-based calorimetry for studies of sub-microgram samples.},
author = {Tagliati, S and Rydh, A and Xie, R and Welp, U and Kwok, W K and Stockholm Univ.)},
abstractNote = {We have developed a membrane-based microcalorimeter for general measurements of heat capacity and latent heat using a combination of ac steady-state and relaxation methods. The differential calorimeter is designed for sub-microgram samples studied over a wide range of temperatures and magnetic fields. The device is based on free-standing silicon nitride membranes of 150 nm thickness onto which thin film heaters and temperature sensors are fabricated. While production-line fabrication may benefit from back-etching as a final step, it is often easier to start with pre-etched membranes in a research laboratory. With selected nano-fabrication methods this is possible. Due to a robust heater and very low thermal conductance of the final calorimeter, the sample can be heated to more than 100 K above base temperature. This enables instantaneous calibration, and makes the device capable of being used for ultra-fast temperature control, relaxation studies, and measurements that combine good absolute accuracy, high resolution, and information on latent heat.},
doi = {10.1088/1742-6596/150/5/052256},
url = {https://www.osti.gov/biblio/1011307}, journal = {J. Phys.: Conf. Series},
number = Jan. 2009,
volume = 150,
place = {United States},
year = {Thu Jan 01 00:00:00 EST 2009},
month = {Thu Jan 01 00:00:00 EST 2009}
}

Conference:
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