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Room-temperature ferromagnetism observed in Nd-doped In_2O_3 dilute magnetic semiconducting nanowires 下载免费PDF全文
Nd-doped In_2O_3 nanowires were fabricated by an Au-catalyzed chemical vapor deposition method.Nd atoms were successfully doped into the In_2O_3 host lattice structure,as revealed by energy dispersive x-ray spectroscopy,x-ray photoelectron spectroscopy,Raman spectroscopy,and x-ray diffraction.Robust room temperature ferromagnetism was observed in Nd-doped In_2O_3 nanowires,which was attributed to the long-range-mediated magnetization among Nd~(3+)-vacancy complexes through percolation-bound magnetic polarons. 相似文献
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Topological Weyl semimetal WTe2 with large-scale Him form has a promising prospect for new-generation spintronic devices.However,it remains a hard task to suppress the defect states in large-scale WTe2 films due to the chemical nature.Here we significantly improve the crystalline quality and remove the Te vacancies in WTe2 films by post annealing.We observe the distinct Shubnikov-de Haas quantum oscillations in WTe2 films.The nontrivial Berry phase can be revealed by Landau fan diagram analysis.The Hall mobility of WTe2 films can reach 1245cm^2V^-1s^-1 and 1423cm^2V^-1s^-1 for holes and electrons with the carrier density of 5× 10^19 cm^-3 and 2 × 10^19 cm^-3,respectively.Our work provides a feasible route to obtain high-quality Weyl semimetal films for the future topological quantum device applications. 相似文献
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铁氰化钾发光体系测定多巴酚丁胺 总被引:2,自引:0,他引:2
在NaOH碱性介质中,Fe(CN)3-6可直接氧化多巴酚丁胺产生化学发光,据此,结合流动注射技术,建立了直接化学发光测定多巴酚丁胺的方法。方法的线性范围和检出限分别为0.5~100μg·ml-1和0.3μg·ml-1,相对标准偏差(n=11)为1.1%。方法用于药物中多巴酚丁胺含量的测定,结果满意。 相似文献
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关于一类拟线性椭圆型方程带有间断边值的Dirichlet问题的注记 总被引:1,自引:0,他引:1
<正> 任朝佐在文[1]中讨论了拟线性椭圆型方程Δu(x,y)+f(x,y,u,((?)u)/((?)x),((?)u)/((?)y))=0带有间断边值的 Dirichlet 问题解的存在性、唯一性及间断点附近的性质.本文将这些加以推广,讨论更一般的拟线性椭圆型方程Lu≡a(x,y)((?)~2u)/((?)x~2)+2b(x,y)((?)~2u)/((?)x(?)y)+c(x,y)((?)~2u)/((?)y~2)+f(x,y,u,((?)u)/((?)x),((?)u)/((?)y))=0 (1)的类似问颢,得到相应的结果,而且区域也取消了[1]中的凸性的限制. 相似文献
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