期刊
PHYSICAL REVIEW B
卷 85, 期 17, 页码 -出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevB.85.174514
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资金
- NSF [DMR0847681]
- Direct For Mathematical & Physical Scien
- Division Of Materials Research [0847681] Funding Source: National Science Foundation
We present evidence of type-I superconductivity in single crystals of ScGa3 and LuGa3, from magnetization, specific heat, and resistivity measurements: low critical temperatures T-c = 2.1-2.2 K; field-induced second-to first-order phase transition in the specific heat, critical fields less than 240 Oe; and low Ginzburg-Landau coefficients. approximate to 0.23 and 0.30 for ScGa3 and LuGa3, respectively, are all traits of a type-I superconducting ground state. These observations render ScGa3 and LuGa3 two of only several type-I superconducting compounds, with most other superconductors being type II (compounds and alloys) or type I (elemental metals and metaloids).
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