期刊
JOURNAL OF ELECTRONIC MATERIALS
卷 41, 期 6, 页码 1177-1180出版社
SPRINGER
DOI: 10.1007/s11664-011-1898-0
关键词
Clathrates; thermoelectric; specific heat; Zintl phase
资金
- Ministry of Education, Culture, Sports, Science, and Technology of Japan [18204030, 19014001, 18651075, 18204032]
- Tohoku University
- Grants-in-Aid for Scientific Research [19014001, 18204030, 23510147, 19051001, 18651075] Funding Source: KAKEN
Polycrystalline samples of type I clathrate Ba8Ni Ge46- ( = 3, 4, 6) have been synthesized using a radio-frequency (RF) induction furnace. Ba8Ni Ge46- samples show metallic-like behavior (d/d > 0) with high resistivity at room temperature, and diamagnetic susceptibility at 2 K and 300 K. The charge carriers vary from type to type depending on the Ni stoichiometry. The carrier concentrations at 300 K are calculated to be 5.84(3) e(-)/cell for = 3, 2.29(1) e(-)/cell for = 4, and 3.29(1) h(+)/cell for = 6. The deviation of the carrier concentrations from the values expected based on 4-bonded Ni suggests that vacancies may play a very important role in the electronic states. The effective carrier masses are estimated from the low-temperature heat capacity data.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据