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Superconductivity in silver boron intermetallic compound

The synthesis of a novel silver boron intermetallic compound (nominal composition: AgB 2 ) and the occurrence of superconductivity are reported. The samples are prepared by a thin-film pulsed laser deposition method incorporating a cap technique and an annealing process in a high vacuum. A sharp transition to zero resistance at T c = 6.7 K is observed. The observed T c is significantly lower than the theoretically predicted T c of AgB 2 diboride.