Single crystal growth of GdB6 by the optical floating-zone technique,CrystEngComm

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Single crystal growth of GdB6 by the optical floating-zone technique
CrystEngComm ( IF 2.6 ) Pub Date : 2020-10-23 , DOI: 10.1039/d0ce01236j
Shu-yu Ning _{1,

2,

3,

4,

5} , Xinyu Yang _{1,

2,

3,

4,

5} , Yan Wang _{1,

2,

3,

4,

5} , Zhongwen Zhu _{1,

2,

3,

4,

5} , Jiuxing Zhang _{1,

2,

3,

4,

5}

Affiliation

A high-quality and large-sized GdB₆ single crystal was successfully prepared by using the optical floating zone method to accurately control the temperature and composition of the molten zone. A GdB₆ [100] single crystal 25 mm in length and 5 mm in diameter was obtained. The full width at half-maximum (FWHM) of the X-ray rocking curves was 0.227°, which indicated that the as-grown GdB₆ single crystal had a high quality. The maximum thermionic emission current density of the GdB₆ single crystal was 6.73 A cm⁻² at U = 4000 V and T = 1873 K, and the average work function was 2.99 eV. Combining first-principles calculations and experiments, the work function was found to monotonically increase as the size of the GdB₆ single crystal changed from nanostructure (1D) to bulk (3D).

中文翻译：

通过光学浮区技术生长GdB6的单晶

通过使用光学浮区法来精确控制熔融区的温度和成分，成功制备了高质量，大尺寸的GdB ₆单晶。获得了长度为25mm，直径为5mm的GdB ₆ [100]单晶。X射线摇摆曲线的半峰全宽（FWHM）为0.227°，这表明生长的GdB ₆单晶具有高质量。在U = 4000 V和T下，GdB ₆单晶的最大热电子发射电流密度为6.73 A cm ^-2= 1873 K，平均功函数为2.99 eV。结合第一性原理的计算和实验，发现功函数随着GdB ₆单晶的尺寸从纳米结构（1D）变为本体（3D）单调增加。

更新日期：2020-11-16

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