Hydrogen loading of nano crystalline niobium thin-films

This contribution presents the phase transition in hydrogen loaded nano crystalline thin films. As model the system of niobium with hydrogen was measured during gas phase loading. The phase transition is monitored in situ with the surface sensitive scanning tunneling microscopy (STM). The α and hydride phase can be distinguish due to the expansion of the hydride phase. We will show the arrangement of the hydride phase in the surrounding α phase. Due to the continuous taken STM images we also show the time dependency of the phase transition