STRUCTURAL RELAXATION OF ZR70BE30 AND ZR67CU33 METALLIC GLASSES - LOW-ENERGY VIBRATIONAL-MODES, ELECTRON SPECTRUM AND SUPERCONDUCTIVITY

Measurements of the low-temperature specific heat are presented for th e metallic glasses Zr70Be30 and Zr67Cu33 in the as-quenched (cooling r ate similar to 10(6) K/s) and relaxed (annealing at T=450 K for 2 h) s tates. Structure relaxation increases both the electron density of sta tes at the Fermi level and the Debye temperature, and at the same time the temperature of the superconducting transition decreases. The main parameters of the attractive interelectron interaction spectrum: coup ling parameter, lambda, and the effective frequency, omega(ph), have b een determined.