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Thermal conductivity of Ga1−x Al x As alloys
Abstract
This paper presents the results of our measurement of the room-temperature thermal conductivity of the Ga1−xAlxAs alloy system. The study was motivated by our need to characterize the thermal properties of cw heterostructure lasers, in which the heat generated in the optically active layer must flow through a substantial thickness of Ga1−xAlxAs to reach the heat sink. The measurement was made on LPE layers which were separated from their substrates and fashioned into rectangular bars. A steady-state heat flow was established in the bars utilizing an argon laser as the heat source, and the conductivity was obtained by measuring the temperature gradient in the bars with thin films of cholesteric liquid crystals. The results indicate that the thermal conductivity of the alloy is well described by an existing theoretical treatment of high-temperature lattice thermal conductivity of disordered semiconductor alloys. In the Ga1−xAlxAs system, the increased thermal resistivity of the alloy is shown to be a result of phonon scattering from mass defects and not lattice strain, which is negligible due to the excellent lattice parameter match of GaAs and AlAs.
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Citations
Cited by
GaAs, AlAs, and Al x Ga1−x As: Material parameters for use in research and device applications
Adachi, S. (1985) · Journal of Applied Physics · doi:10.1063/1.336070 · Cited by 3,289
Cahill, D. G., Ford, W. K., Goodson, K. E., Mahan, G. D., Majumdar, A., Maris, H. J., Merlin, R., & Phillpot, S. R. (2003) · Journal of Applied Physics · doi:10.1063/1.1524305 · Cited by 2,825
The Thermal Conductivity of Nonmetallic Crystals
Slack, G. A. (1979) · Solid State Physics · doi:10.1016/s0081-1947(08)60359-8 · Cited by 1,112
The intrinsic thermal conductivity of AIN
Slack, G. A., Tanzilli, R. A., Pohl, R. O., & Vandersande, J. W. (1987) · Journal of Physics and Chemistry of Solids · doi:10.1016/0022-3697(87)90153-3 · Cited by 1,009
Coherent Phonon Heat Conduction in Superlattices
Luckyanova, M. N., Garg, J., Esfarjani, K., Jandl, A., Bulsara, M. T., Schmidt, A. J., Minnich, A. J., Chen, S., Dresselhaus, M. S., Ren, Z., et al. (2012) · Science · doi:10.1126/science.1225549 · Cited by 630
Metadata
- Authors
- Afromowitz, M. A.
- Venue
- Journal of Applied Physics
- Publisher
- AIP Publishing
- Published
- 1973-03-01
- Volume
- 44
- Issue
- 3
- Pages
- 1292-1294
- ISSN
- 0021-8979 (ISSN-L)
- 1089-7550
- OpenAlex
- W2062315702
- Cited by
- 188
- References
- 0
- FWCI
- 5.86
- Type
- journal article
- Language
- en
- Open access
- closed
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