Photoemision spectroscopic results obtained on (a)CaB6 and LaB6(b)PdAg(100) surface allys (c) Ta/Si(100) and (d) Ta nano-structures willbe discussed. CaB6 exhibits surprisingly a ferromagnetic behavior withoutmagnetic ions present. Origin of the FM behavior observed in CaB6 wasinvestigated using high resolution photoemission studies. A pseudogapformation has been observed in LaB6 which explains the low temperatureanomalies exhibited by LaB6. Core level chemical shifts observed onPdAg(100) ordered surface alloys will be discussed against the core levelchemical shifts observed for random bulk PdAg alloys. Thermal stability ofTa2O5 deposited on Si(100) was investigated using high energyphotoemission technique. The effect of in-situ annealing on the corelevels of Ta, Si and O will be discussed briefly. Ta nano-structures havebeen prepared by sputtering Ta foil in-situ in XPS machine using argon ionsputtering. Ta 4f exhibited a surface core level shift of 0.5 eV with anegligible bulk Ta 4f intensity. High intensity of the surface core levelindicates nano-structureformation and AFM topography shows nano-structure formation.
