title: Pronounced slow β-relaxation in La-based bulk metallic glasses.
abstract: Most metallic glasses (MGs) exhibit weak evidence of slow β-relaxation in their dynamic mechanical spectroscopy spectra. In contrast to other MGs, the La-based MGs we report here show a distinct slow β-relaxation peak in the mechanical relaxation measurements. We find that the slow β-relaxation behavior can be tuned by modification of the chemical composition and fragility. The structural origin of the slow β-relaxation and correlation between β-relaxation and α-relaxation in the MGs are also discussed. MGs with pronounced slow β-relaxation and tunable properties might provide a model system to investigate some long-standing issues in the glass field.
authors.affiliation: Institute of Physics, Chinese Academy of Sciences, Beijing, People's Republic of China.
authors.forename: Z
authors.initials: Z
authors.lastname: Wang
authors.forename: H B
authors.initials: HB
authors.lastname: Yu
authors.forename: P
authors.initials: P
authors.lastname: Wen
authors.forename: H Y
authors.initials: HY
authors.lastname: Bai
authors.forename: W H
authors.initials: WH
authors.lastname: Wang