Abstract

We report the crystal structure and superconducting phase diagram for In pSn1- p (0.01 ≤ p ≤ 0.99) bimetallic alloys. A weak electron-phonon coupling was observed in intergranular linked InSn superconductors over an infinite range mediated by high-energy phonons. An enhanced TC(0) ∼ 6.2 K and critical field HC(0) ∼ 2.7 kOe were determined from intermediate (γ-Sn + β-InSn) composite alloys attributed to internal strain possibly originating from thermal expansion effect of constituent phases.

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