Optical absorption of Co~(2+) in MgIn_2S_4, CdIn_2S_4, and HgIn_2S_4 spinel crystals

Seok-Joo Lee; Jae-Eun Kim; Hae Yong Park

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Optical absorption of Co~(2+) in MgIn_2S_4, CdIn_2S_4, and HgIn_2S_4 spinel crystals

机译：MgIn_2S_4，CdIn_2S_4和HgIn_2S_4尖晶石晶体中Co〜（2+）的光吸收

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The optical absorption spectra of cobalt-doped MgIn_2S_4, CdIn_2S_4, and HgIn_2S_4 single crystals grown by a chemical transport reaction were investigated at 7 K. The values of Dq and B calculated from the observed spectra show that the d electrons are more delocalized in the order of MgIn_2S_4, CdIn_2S_4, and HgIn_2S_4. Because this order corresponds to the decreasing order of the electronegativity differences between the metal and sulfur atoms of the host crystals, we conclude that as the metal-sulfur bonds in the host crystals are more covalent, the d electrons of the cobalt impurities are more spread out and the cobalt-sulfur bonds are also more covalent.

机译：在7 K下研究了通过化学传输反应生长的掺钴MgIn_2S_4，CdIn_2S_4和HgIn_2S_4单晶的光吸收光谱。从观察到的光谱计算出的Dq和B值表明d电子按顺序更离域化MgIn_2S_4，CdIn_2S_4和HgIn_2S_4的数量。因为该顺序对应于主体晶体的金属原子与硫原子之间电负性差异的递减顺序，所以我们得出结论，随着主体晶体中的金属硫键更共价，钴杂质的d电子更扩散且钴-硫键也更共价。

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来源
《Journal of Materials Research》 |2003年第3期|p.733-736|共4页
作者
Seok-Joo Lee; Jae-Eun Kim; Hae Yong Park;
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作者单位

Department of Physics, Korea Advanced Institute of Science and Technology, Guseong-dong 373-1, Yuseong-gu, Daejeon 305-701, Korea;

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收录信息美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);
原文格式 PDF
正文语种 eng
中图分类工程材料学;
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Optical absorption of Co~(2+) in MgIn_2S_4, CdIn_2S_4, and HgIn_2S_4 spinel crystals

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