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Effects of induced optical tunable and ferromagnetic behaviors of Ba doped nanocrystalline LaB6
Bao, Lihong; Qi, Xiaoping; Tana; Chao, Lumen; Tegus, O.; Bao, LH (reprint author), Inner Mongolia Normal Univ, Inner Mongolia Key Lab Phys & Chem Funct Mat, Hohhot 010022, Peoples R China.
2016-07-28
发表期刊PHYSICAL CHEMISTRY CHEMICAL PHYSICS
ISSN1463-9076
卷号18期号:28页码:19165-19172
摘要Multiple nanocrystalline rare-earth hexaborides La1-xBaxB6 have been synthesized via a single step solid-state reaction. The Ba doping effects on crystal structure, grain morphology, magnetic and optical absorption properties were investigated using XRD, FESEM, HRTEM, SQUID magnetometry and optical measurements. The results show that all the Ba-doped hexaborides crystallize in the CsCl-type single phase, indicating the Ba atoms occupied the lattice sites of LaB6. The optical absorption results indicate that the absorption valleys of LaB6 are red-shifted from 622 nm to 780 nm when the Ba doping content increases to x = 0.8. The first-principle calculation results reveal that Ba doping reduces the total kinetic energy of the electrons of LaB6, which lead to the absorption valleys moving toward a higher wavelength. Meanwhile, the band gap of BaB6 obtained from optical absorption is in good agreement with the theoretical calculation results. The magnetic measurements results showed that Ba doping lead to room-temperature ferromagnetism of LaB6 due to the different ionic radii of La3+ and Ba2+ causing intrinsic crystal defects, which is directly observed experimentally by HRTEM. This is the first time that we have found the tunable optical and ferromagnetic behavior of Ba doped nanocrystalline LaB6. Thus, nanocrystalline La(1-x)BaxB(6), as multi-functional materials, should open up a new route to extend the optical and magnetic applications of LaB6 nanopowder.
部门归属[bao, lihong ; qi, xiaoping ; tana ; tegus, o.] inner mongolia normal univ, inner mongolia key lab phys & chem funct mat, hohhot 010022, peoples r china ; [chao, lumen] chinese acad sci, shenyang natl lab mat sci, inst met res, 72 wenhua rd, shenyang 110016, peoples r china
学科领域Chemistry ; Physics
资助者Fundamental Research Open Project of Inner Mongolia [20130902]; National Natural Science Foundation of China [51302129]; Program for Young Talents of Science and Technology in Universities of Inner Mongolia [NJYT-14-B03]; High Level Talents Scientific Foundation of Inner Mongolia Normal University, China [2013YJRC017]
收录类别sci
语种英语
文献类型期刊论文
条目标识符http://ir.imr.ac.cn/handle/321006/75787
专题中国科学院金属研究所
通讯作者Bao, LH (reprint author), Inner Mongolia Normal Univ, Inner Mongolia Key Lab Phys & Chem Funct Mat, Hohhot 010022, Peoples R China.
推荐引用方式
GB/T 7714
Bao, Lihong,Qi, Xiaoping,Tana,et al. Effects of induced optical tunable and ferromagnetic behaviors of Ba doped nanocrystalline LaB6[J]. PHYSICAL CHEMISTRY CHEMICAL PHYSICS,2016,18(28):19165-19172.
APA Bao, Lihong,Qi, Xiaoping,Tana,Chao, Lumen,Tegus, O.,&Bao, LH .(2016).Effects of induced optical tunable and ferromagnetic behaviors of Ba doped nanocrystalline LaB6.PHYSICAL CHEMISTRY CHEMICAL PHYSICS,18(28),19165-19172.
MLA Bao, Lihong,et al."Effects of induced optical tunable and ferromagnetic behaviors of Ba doped nanocrystalline LaB6".PHYSICAL CHEMISTRY CHEMICAL PHYSICS 18.28(2016):19165-19172.
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