Formation and properties of SrB6 single crystals synthesized under high pressure and temperature
Formation and properties of SrB6 single crystals synthesized under high pressure and temperature
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高温高压合成SrB6单晶的形成及性能
DOI：
10.1016/j.jallcom.2011.05.037
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发表时间：
2011-07
影响因子：
6.2
通讯作者：
He, Julong
中科院分区：
文献类型：
--
作者：
Yu, Dongli;Liu, Shaocun;Wang, Nan;Han, Xianyue;Wang, Limin;Xu, Bo;Tian, Yongjun;Liu, Zhongyuan;He, Julong
在高压（5GPa）和高温（1300 °C）下合成了纯SrB 6单晶。利用X射线衍射仪和场发射扫描电镜对SrB 6单晶的结构和形貌进行了表征。空间群为Pm-3 misa的SrB_6晶体的晶格常数为4.1975 nm。电阻率和霍尔系数随温度的变化表明，SrB_6单晶是半金属导电材料，可以看作是电子的载流子。能带结构计算结果表明，导带和价带在费米能级的X点相交，这与实验测量的SrB 6单晶的导电行为一致.总态密度和分态密度表明，费米能级上的态来自于B原子的2 p轨道和Sr原子的4d轨道。磁化测量显示了SrB 6的抗磁性。纳米压痕测试表明，SrB 6的硬度达到33 GPa。
Pure SrB6single crystals are synthesized under high pressure (5 GPa) and temperature (1300 °C). The structure and morphology of the SrB6single crystals are characterized by X-ray diffraction and field emission scanning electron microscope. The lattice constant of the SrB6crystals with a space group ofPm-3misa= 4.1975 Å. The dependence of electric resistivity and Hall coefficient on temperatures from 2 to 300 K show that the SrB6single crystals are conductive materials with semi-metallic behavior and can be considered as electronic current carriers. The results of the band structure calculation show that the conduction and valence bands meet at theXpoint at the Fermi Level, which is consistent with the experimentally measured conducting behavior of SrB6single crystals. The total and partial density of states show that the states at the Fermi level come from the 2p orbitals of the B atoms and the 4d orbital of the Sr atom. The magnetization measurement shows the diamagnetic nature of the SrB6. The nanoindentation measurement indicates that the hardness of SrB6reached 33 GPa.
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影响因子：
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作者：
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影响因子：
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