Probing the local coordination environment for transition metal dopants in zinc oxide nanowires.
Probing the local coordination environment for transition metal dopants in zinc oxide nanowires.
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DOI：
10.1021/nl0626939
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发表时间：
2007-03
期刊：
影响因子：
10.8
通讯作者：
Benjamin D. Yuhas;S. Fakra;M. Marcus;P. Yang
中科院分区：
文献类型：
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作者：
Benjamin D. Yuhas;S. Fakra;M. Marcus;P. Yang
据推测，一个高度有序的，相对无缺陷的稀磁半导体系统应作为一个弱铁磁体。过渡金属掺杂的ZnO纳米线，单晶，单域，和单相，在这里被用来作为一个模型系统，用于探测本地掺杂剂的协调环境，使用X射线吸收光谱和衍射。我们的X-射线光谱数据清楚地表明，掺杂剂驻留在一个均匀的环境中，掺杂不会引起很大程度的混乱的纳米线。氧化物基质内的掺杂的这种均匀性质与所观察到的纳米线的弱铁磁性行为很好地相关。
It is hypothesized that a highly ordered, relatively defect-free dilute magnetic semiconductor system should act as a weak ferromagnet. Transition-metal-doped ZnO nanowires, being single crystalline, single domain, and single phase, are used here as a model system for probing the local dopant coordination environments using X-ray absorption spectroscopy and diffraction. Our X-ray spectroscopic data clearly show that the dopant resides in a uniform environment, and that the doping does not induce a large degree of disorder in the nanowires. This homogeneous nature of the doping inside the oxide matrix correlates well with observed weakly ferromagnetic behavior of the nanowires.