硼化钐
12008-30-9
产品详情:
Samarium Boride, also called Samarium Hexaboride, is one of the rare earth borides, the molecular formula is SmB6. SmB6 is an intermediate-valence compound where samarium is present both as Sm2+ and Sm3+ ions at the ratio 3:7. It belongs to a class of Kondo insulators. At temperatures above 50 K its properties are typical of a Kondo metal, with metallic electrical conductivity characterized by strong electron scattering, whereas at low temperatures, it behaves as a non-magnetic insulator with a narrow band gap of about 4–14 meV. The cooling-induced metal-insulator transition in SmB6 is accompanied by a sharp increase in thermal conductivity, peaking at about 15 K. The reason for this increase is that electrons do not contribute to thermal conductivity at low temperatures, which is instead dominated by phonons. The decrease in electron concentration reduced the rate of electron-phonon scattering.
Samarium Boride, also called Samarium Hexaboride, is one of the rare earth borides, the molecular formula is SmB6.
公司简介
成立日期 | (5年) |
注册资本 | 1000万人民币 |
员工人数 | 1-10人 |
年营业额 | ¥ 5000万-1亿 |
经营模式 | 工厂 |
主营行业 | 有色金属矿,稀有金属矿 |
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