Abstract
Zirconium nitride films were deposited on Si substrates by an ion beam assisted deposition (IBAD) approach. The response of nanocrystalline ZrN/Si films upon intense ion irradiations was investigated with the focus on new phase formation. Zirconium silicide (ZrSi) forms at the ZrN/Si interface under intense irradiations of 300keV Ne+ and 1MeV Kr2+ in the elastic stopping regime. The strong ballistic effects may cause atom mixing at the ZrN/Si interface, leading to the precipitation of ZrSi. Interface mixing and the formation of ZrSi also occur with swift heavy ion irradiation (1.465GeV Xe). Thermal spikes in the nano-scale latent tracks and transient high temperature may lead to the atom mixing across the ZrN/Si interface and subsequent ZrSi formation following thermal spikes.
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