Flux growth at 1230 °C of cubic Tb2O3 single crystals and characterization of their optical and magnetic properties
Flux growth at 1230 °C of cubic Tb2O3 single crystals and characterization of their optical and magnetic properties
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DOI：
10.1039/c4ce02006e
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发表时间：
2015
期刊：
影响因子：
3.1
通讯作者：
P. Veber;M. Velázquez;G. Gadret;D. Rytz;M. Peltz;R. Decourt
中科院分区：
文献类型：
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作者：
P. Veber;M. Velázquez;G. Gadret;D. Rytz;M. Peltz;R. Decourt
在这项工作中，我们首次采用可控气氛通量法生长立方Tb2O3单晶，该方法使用不含重金属的溶剂，在不到该倍半氧化物熔化温度的一半的温度下工作。从生长的球体中提取的立方毫米大小的晶体是纯相（粉末XRD）和化学（GDMS）的，并且在可见光和近红外光谱范围内具有Verdet常数，比商用Tb3Ga5O12 （TGG）晶体高至少三倍。在525 nm-1.38 μm光谱范围内，1.36 mm厚晶体的透射系数高于77%。单晶的吸收光谱、磁化率和比热测量证实，没有可检测到的Tb4+阳离子和其他杂质。
In this work, we present the first crystal growth of cubic Tb2O3 single crystals by a controlled atmosphere flux method which uses a heavy metal free solvent working at less than half the melting temperature of this sesquioxide. Cubic millimeter-sized crystals extracted from as-grown boules are phase (powder XRD) and chemically (GDMS) pure and exhibit a Verdet constant in the visible and near-infrared spectral ranges, which is at least three times higher than that of a commercial Tb3Ga5O12 (TGG) crystal. The 1.36 mm thick crystals display a transmission coefficient higher than 77% over the 525 nm–1.38 μm spectral range. The absorption spectrum, magnetic susceptibility and specific heat measurements on the single crystals confirm the absence of detectable Tb4+ cations and other impurities.