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Formation and properties of SrB6 single crystals synthesized under high pressure and temperature
Xin Shenwei 1,Shaocun Liu 2,Limin Wang 2,Bo Xu 2,Zhongyuan Liu 2,Yongjun Tian 2 #,Julong He 2,Dongli Yu 2 *
1.Key Laboratory of Metastable Materials Science and Technology, Yanshan University
2.Key Laboratory of Metastable Materials Science and Technology, Yanshan University, Qinhuangdao, Hebei 066004, Peoples Republic of China
*Correspondence author
#Submitted by
Subject:
Funding: the NBRPC（No.Grant No. 2005CB724400）, National Natural Science Foundation of China （No.Grant Nos. 51072174, 50772094 and 50821001）
Opened online:23 May 2011
Accepted by: none
Citation: Xin Shenwei ,Shaocun Liu,Limin Wang.Formation and properties of SrB6 single crystals synthesized under high pressure and temperature[OL]. [23 May 2011] http://en.paper.edu.cn/en_releasepaper/content/4427484
 
 
Pure SrB6 single crystals are synthesized under high pressure (5 GPa) and temperature (1300 C). The structure and morphology of the SrB6 single crystals are characterized by X-ray diffraction and field emission scanning electron microscope. The lattice constant of the SrB6 crystals with a space group of Pm-3m is a=4.1975 ?. The dependence of electric resistivity and Hall coefficient on temperatures from 2-300 K show that the SrB6 single 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 the X point at the Fermi Level, which is consistent with the experimentally measured conducting behavior of SrB6 single 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 SrB6 reached 33 GPa.
Keywords:High pressure; SrB6; semi-metallic; Single crystals
 
 
 

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