Effective optical Faraday rotations of semiconductor EuS nanocrystals with paramagnetic transition-metal ions.
Effective optical Faraday rotations of semiconductor EuS nanocrystals with paramagnetic transition-metal ions.
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DOI：
10.1021/ja3106253
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发表时间：
2013-02
影响因子：
15
通讯作者：
Y. Hasegawa;M. Maeda;T. Nakanishi;Y. Doi;Y. Hinatsu;K. Fujita;Katsuhisa Tanaka;H. Koizumi;K. Fushimi
中科院分区：
文献类型：
--
作者：
Y. Hasegawa;M. Maeda;T. Nakanishi;Y. Doi;Y. Hinatsu;K. Fujita;Katsuhisa Tanaka;H. Koizumi;K. Fushimi
据报道，含有顺磁性Mn(Ⅱ)、Co(Ⅱ)或Fe(Ⅱ)离子的新型EuS纳米晶体是一种先进的半导体材料，在磁场（法拉第旋转）下具有有效的旋光性。含过渡金属离子的EuS纳米晶体（EuS:M纳米晶体）是通过在300℃下用过渡金属配合物还原二硫代氨基甲酸铕(Ⅲ)配合物四苯基鏻四（二乙基二硫代氨基甲酸）铕(Ⅲ)制备的。使用X射线衍射（XRD）、透射电子显微镜（TEM）、电感耦合等离子体原子发射光谱分析（ICP - AES）和超导量子干涉仪（SQUID）磁强计对如此制备的EuS:M纳米晶体进行了表征。在550nm左右观察到EuS:M纳米晶体的法拉第旋转增强，并且使用电子顺磁共振（EPR）测量估计了它们增强的自旋极化。在本报告中，讨论了法拉第旋转效率和自旋极化之间的磁光关系。
Novel EuS nanocrystals containing paramagnetic Mn(II), Co(II), or Fe(II) ions have been reported as advanced semiconductor materials with effective optical rotation under a magnetic field, Faraday rotation. EuS nanocrystals with transition-metal ions, EuS:M nanocrystals, were prepared by the reduction of the Eu(III) dithiocarbamate complex tetraphenylphosphonium tetrakis(diethyldithiocarbamate)europium(III) with transition-metal complexes at 300 °C. The EuS:M nanocrystals thus prepared were characterized using X-ray diffraction (XRD), transmission electron microscopy (TEM), inductively coupled plasma atomic emission spectroanalysis (ICP-AES), and a superconducting quantum interference device (SQUID) magnetometer. Enhanced Faraday rotations of the EuS:M nanocrystals were observed around 550 nm, and their enhanced spin polarization was estimated using electron paramagnetic resonance (EPR) measurements. In this report, the magneto-optical relationship between the Faraday rotation efficiency and spin polarization is discussed.