Preparation and properties of the system Fe1−xCrxNbO4
Preparation and properties of the system Fe1−xCrxNbO4
复制标题
Fe1−xCrxNbO4 体系的制备及性能
DOI：
10.1016/0022-4596(81)90275-9
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发表时间：
1981
影响因子：
3.3
通讯作者：
A. Wold
中科院分区：
文献类型：
--
作者：
B. Khazai;R. Kershaw;K. Dwight;A. Wold
制备了 Fe1−xCrxNbO4 体系的成员并研究了它们的磁和电子性质。结果表明，铬取代有利于金红石结构的形成，由于结构中过渡金属离子的随机化，导致电导率下降。用 Cr3+ 替代百分之几的 Fe3+ 导致最低光学带隙显着降低，而高能跃迁基本保持不变。这导致对太阳光谱较长波长的响应增加。
Members of the system Fe1−xCrxNbO4were prepared and their magnetic and electronic properties were investigated. It was shown that chromium substitution favored the formation of the rutile structure, which resulted in a decrease in the electrical conductivity because of randomization of the transition metal ions in the structure. The replacement of a few percent of Fe3+with Cr3+caused a significant lowering of the lowest optical band gap, whereas the higher-energy transitions remained essentially unchanged. This resulted in increased response to the longer wavelengths of the solar spectrum.