“…Transmission electron microscopy was performed in the attached Hitachi UHV-H9000 operated at 300 keV; information on using transmission electron microscopy to study surfaces has been given elsewhere [35][36][37][38][39][40]. An in situ test for the presence of magnetism in the single crystal TEM specimens, as a way to empirically identify possible phases, was developed based on the attraction of unfixed specimens to the strong magnetic field of the objective lens of the microscope.…”