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Thermal conductivit...
Thermal conductivity of ScxAl1-xN and YxAl1-xN alloys
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- Tran, Dat (författare)
- Linköping University,Linköpings universitet,Halvledarmaterial,Tekniska fakulteten,Center for III-Nitride Technology, C3NiT-Janzen
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- Tasnadi, Ferenc (författare)
- Linköping University,Linköpings universitet,Teoretisk Fysik,Tekniska fakulteten
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- Zukauskaite, Agne (författare)
- Fraunhofer Inst Organ Elect Electron Beam & Plasma, Germany; Tech Univ Dresden, Germany,Dresden University of Technology
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- Birch, Jens (författare)
- Linköping University,Linköpings universitet,Tunnfilmsfysik,Tekniska fakulteten
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- Darakchieva, Vanya (författare)
- Linköping University,Lund University,Lunds universitet,Linköpings universitet,Halvledarmaterial,Tekniska fakulteten,Lund Univ, Sweden,Center for III-Nitride Technology, C3NiT-Janzen; THz Materials Analysis Center (TheMAC),NanoLund: Centre for Nanoscience,Annan verksamhet, LTH,Lunds Tekniska Högskola,Fasta tillståndets fysik,Fysiska institutionen,Institutioner vid LTH,LTH profilområde: Nanovetenskap och halvledarteknologi,LTH profilområden,LU profilområde: Ljus och material,Lunds universitets profilområden,Other operations, LTH,Faculty of Engineering, LTH,Solid State Physics,Department of Physics,Departments at LTH,Faculty of Engineering, LTH,LTH Profile Area: Nanoscience and Semiconductor Technology,LTH Profile areas,Faculty of Engineering, LTH,LU Profile Area: Light and Materials,Lund University Profile areas
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- Paskov, Plamen (författare)
- Linköping University,Linköpings universitet,Halvledarmaterial,Tekniska fakulteten,Center for III-Nitride Technology, C3NiT-Janzen
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(creator_code:org_t)
- AIP Publishing, 2023
- 2023
- Engelska.
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Ingår i: Applied Physics Letters. - : AIP Publishing. - 0003-6951 .- 1077-3118. ; 122:18
- Relaterad länk:
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https://liu.diva-por... (primary) (Raw object)
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http://dx.doi.org/10...
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https://urn.kb.se/re...
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https://doi.org/10.1...
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https://lup.lub.lu.s...
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Abstract
Ämnesord
Stäng
- Owing to their very large piezoelectric coefficients and spontaneous polarizations, (Sc,Y) xAl(1-x)N alloys have emerged as a new class of III-nitride semiconductor materials with great potential for high-frequency electronic and acoustic devices. The thermal conductivity of constituent materials is a key parameter for design, optimization, and thermal management of such devices. In this study, transient thermoreflectance technique is applied to measure the thermal conductivity of ScxAl1-xN and YxAl1-xN (0 = x = 0.22) layers grown by magnetron sputter epitaxy in the temperature range of 100-400 K. The room-temperature thermal conductivity of both alloys is found to decrease significantly with increasing Sc(Y) composition compared to that of AlN. We also found that the thermal conductivity of YxAl1-xN is lower than that of ScxAl1-xN for all studied compositions. In both alloys, the thermal conductivity increases with the temperature up to 250 K and then saturates. The experimental data are analyzed using a model based on the solution of the phonon Boltzmann transport equation within the relaxation time approximation. The contributions of different phonon-scattering mechanisms to the lattice thermal conductivity of (Sc,Y) xAl(1-x)N alloys are identified and discussed.
Ämnesord
- NATURVETENSKAP -- Fysik -- Den kondenserade materiens fysik (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences -- Condensed Matter Physics (hsv//eng)
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