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Influence of the number of turns on the performance of permanent magnet synchronous motor

100%
Qiu H., Zhang Y., Yang C., Yi R., Qiu H., Zhang Y., Yang C., Yi R.
Bulletin of the Polish Academy of Sciences: Technical Sciences
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2020
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issue 3
2
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Stimulated Emission in InGaN/GaN Multiple Quantum Wells with Different Indium Content

86%
Miasojedovas S., Juršėnas S., Kurilčik G., Žukauskas A., Springis M., Tale I., Yang C.
Acta Physica Polonica A
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2005
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vol. 107
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issue 2
256-260
EN
We report on high-excitation luminescence spectroscopy of In_xGa_{1-x}N/GaN multiple quantum wells with a high indium content (x=0.22÷0.30). High excitation conditions enabled us to achieve screening of built-in field by free carriers. This allowed for the evaluation of the influence of the band potential fluctuations due to variation in In-content on optical properties. Enhanced spontaneous emission was found for x≫0.22 due to carrier localization within the chaotic band potential. Meanwhile the stimulated emission was found to be the highest for structures with x≈ 0.25-0.27. We attribute the In-content dependence of the stimulated emission intensity to a trade-off between an increased carrier density and a decrease in the density of states.
3
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Characterization of Optical and Photoelectrical Properties of ZnO Crystals

72%
Onufrijevs P., Serevičius T., Scajev P., Manolis G., Medvids A., Chernyak L., Kuokstis E., Yang C., Jarasiunas K.
Acta Physica Polonica A
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2011
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vol. 119
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issue 2
274-276
EN
We characterized optical and photoelectrical properties of undoped and Ga-doped ZnO layers differently grown on sapphire substrates by using complementary optical methods. Different stimulated emission threshold values for ZnO epitaxial layers grown by pulsed laser deposition and MBE methods were attributed to crystalline quality of the layers and the growth method used. Different carrier lifetimes in various ZnO epitaxial layers are explained by defect-related and intrinsic mechanisms of recombination.
4
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Interaction of Magnetic Nanoparticles with Lyotropic Liquid Crystal Studied by AFM

72%
Tomašovičová N., Yang C., Balejčíková L., Gdovinová V., Kubovčíková M., Hayryan S., Hwang I., Hu C.-K., Kopčanský P.
Acta Physica Polonica A
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2017
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vol. 131
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issue 4
958-960
EN
In this work the interaction of lysozyme fibrils with magnetic particles has been studied by atomic force microscopy. The experiments were carried out for a better understanding of the binding process of such complex soft matter systems. The obtained results show that interaction between lysozyme fibrils and magnetic particles starts immediately after mixing them together. Moreover, the samples remain stable in duration of several days after preparation.
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