Hafnium nitride films for thermoreflectance transducers at high temperatures

Potential based on heating from laser absorption

Christina M. Rost, Jeffrey Braun, Kevin Ferri, Lavina Backman, Ashutosh Giri, Elizabeth J. Opila, Jon-Paul Maria, Patrick E. Hopkins

Research output: Contribution to journalArticle

4 Citations (Scopus)

Abstract

Time domain thermoreflectance (TDTR) and frequency domain thermoreflectance (FDTR) are common pump-probe techniques that are used to measure the thermal properties of materials. At elevated temperatures, transducers used in these techniques can become limited by melting or other phase transitions. In this work, time domain thermoreflectance is used to determine the viability of HfN thin film transducers grown on SiO2 through measurements of the SiO2 thermal conductivity up to approximately 1000 K. Further, the reliability of HfN as a transducer is determined by measuring the thermal conductivities of MgO, Al2O3, and diamond at room temperature. The thermoreflectance coefficient of HfN was found to be 1.4 × 10-4K-1 at 800 nm, one of the highest thermoreflectance coefficients measured at this standard TDTR probe wavelength. Additionally, the high absorption of HfN at 400 nm is shown to enable reliable laser heating to elevate the sample temperature during a measurement, relative to other transducers.

Original languageEnglish (US)
Article number151902
JournalApplied Physics Letters
Volume111
Issue number15
DOIs
StatePublished - Oct 9 2017

Fingerprint

hafnium
nitrides
transducers
heating
lasers
thermal conductivity
probes
laser heating
coefficients
viability
thermodynamic properties
diamonds
melting
pumps
temperature
room temperature
thin films
wavelengths

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy (miscellaneous)

Cite this

Rost, C. M., Braun, J., Ferri, K., Backman, L., Giri, A., Opila, E. J., ... Hopkins, P. E. (2017). Hafnium nitride films for thermoreflectance transducers at high temperatures: Potential based on heating from laser absorption. Applied Physics Letters, 111(15), [151902]. https://doi.org/10.1063/1.5006648
Rost, Christina M. ; Braun, Jeffrey ; Ferri, Kevin ; Backman, Lavina ; Giri, Ashutosh ; Opila, Elizabeth J. ; Maria, Jon-Paul ; Hopkins, Patrick E. / Hafnium nitride films for thermoreflectance transducers at high temperatures : Potential based on heating from laser absorption. In: Applied Physics Letters. 2017 ; Vol. 111, No. 15.
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Hafnium nitride films for thermoreflectance transducers at high temperatures : Potential based on heating from laser absorption. / Rost, Christina M.; Braun, Jeffrey; Ferri, Kevin; Backman, Lavina; Giri, Ashutosh; Opila, Elizabeth J.; Maria, Jon-Paul; Hopkins, Patrick E.

In: Applied Physics Letters, Vol. 111, No. 15, 151902, 09.10.2017.

Research output: Contribution to journalArticle

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