Large magneto-optical effect in low-temperature-grown GaCrN and GaCrN:Si
Large magneto-optical effect in low-temperature-grown GaCrN and GaCrN:Si
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DOI：
10.1002/pssc.201100504
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发表时间：
2012-03
期刊：
影响因子：
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通讯作者：
Y. Zhou;P. Fan;S. Emura;S. Hasegawa;H. Asahi
中科院分区：
文献类型：
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作者：
Y. Zhou;P. Fan;S. Emura;S. Hasegawa;H. Asahi
在300 ° C和100 °C下通过射频等离子体辅助分子束外延在蓝宝石衬底上生长GaCrN层。X射线衍射结果表明，在300 °C下生长的GaCrN样品中，即使Cr浓度达到9%，也没有明显的第二相。在低于50 K的光致发光光谱中，在356 nm处发现了一条非常尖锐的线，该线来自GaCrN层中的高结晶质量区域。低温下生长的样品均具有铁磁特性。掺Si的GaCrN在Cr浓度为6%时具有最大的饱和磁化强度。在10 K下对样品进行了磁圆二色性（MCD）测量，以研究其磁光效应。在低温生长的未掺杂和掺Si的GaCrN中证实了大的磁光效应。在低温生长的GaCrN中通过Si掺杂增强塞曼分裂（© 2012 WILEY-VCH Verlag GmbH & Co. KGaA，魏因海姆）。
GaCrN layers were grown at 300 and 100 °C by radio-frequency plasma-assisted molecular-beam epitaxy on sapphire substrates. X-ray diffraction results showed no obvious secondary phase in the GaCrN samples grown at 300 °C with Cr concentration even up to 9%. A very sharp line was found at 356 nm in the photoluminescence spectra below 50 K, which comes from high crystalline quality regions in the GaCrN layers. All the samples grown at low temperatures exhibited ferromagnetic characteristics. Si-doped GaCrN with Cr concentration of 6% has the largest saturation magnetization. Magnetic circular dichroism (MCD) measurement was performed for these samples at 10 K to investigate magneto-optical effect. Large magneto-optical effect was confirmed in the low-temperature-grown non-doped and Si-doped GaCrN. Zeeman splitting was enhanced by Si-doping in the low-temperature-grown GaCrN (© 2012 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim)