Nanoscale Structure, Dynamics, and Aging Behavior of Metallic Glass Thin Films
Abstract
Scanning tunneling microscopy (STM) observations resolve the structure and dynamics of metallic glass Cu100-xHfx films and demonstrate STM control of aging at a metallic glass surface. Surface clusters exhibit heterogeneous hopping dynamics. Low Hf concentration films feature an aged surface of larger, slower clusters. Argon ion-sputtering destroys the aged configuration, yielding a surface in constant fluctuation. STM can locally restore the relaxed state, allowing for nanoscale lithographic definition of aged sections.
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