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Digitale Medien

Study of tellurium precipitates in CdTe crystals (1993)

Jayatirtha, H. N. ; Henderson, D. O. ; Burger, A. ; [weitere]

Woodbury, NY : American Institute of Physics (AIP)

Applied Physics Letters 62 (1993), S. 573-575

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ISSN: 1077-3118

Quelle: AIP Digital Archive

Thema: Physik

Notizen: The effect of tellurium precipitates was studied in medium resistivity (103–106 Ω cm) undoped and Cl-doped CdTe using differential scanning calorimetry (DSC) and mid-infrared spectroscopy and the results were correlated with near-infrared microscopy photographs. When present in a significant quantity (∼0.25 wt %), we show that Te precipitates are detectable using DSC measurements. In the mid-infrared, the contribution of the absorption by free-carriers is negligible, and therefore, the effect of the Te precipitates in these crystals can be considered uncoupled from the effects of Cd vacancies.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1063/1.108885

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Digitale Medien

Flow transitions in a rotating magnetic field (1996)

Volz, M. P. ; Mazuruk, K.

Springer

Experiments in fluids 20 (1996), S. 454-459

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ISSN: 1432-1114

Quelle: Springer Online Journal Archives 1860-2000

Thema: Maschinenbau

Notizen: Abstract Critical Rayleigh numbers have been measured in a liquid metal cylinder of finite height in the presence of a rotating magnetic field. Several different stability regimes were observed, which were determined by the values of the Rayleigh and Hartmann numbers. For weak rotating magnetic fields and small Rayleigh numbers, the experimental observations can be explained by the existence of a single non-axisymmetric meridional roll rotating around the cylinder, driven by the azimuthal component of the magnetic field. The measured dependence of rotational velocity on magnetic field strength is consistent with the existence of laminar flow in this regime.