Electronic structure of strained ( La 0.85 Ba 0.15 ) Mn O 3 thin films with room-temperature ferromagnetism investigated by hard x-ray photoemission spectroscopy

摘要: We report the bulk sensitive hard x-ray $(h\ensuremath{\nu}=5.95\phantom{\rule{0.3em}{0ex}}\mathrm{keV})$ core level photoemission spectroscopy to investigate intrinsic electronic structure of strained $({\mathrm{La}}_{0.85}{\mathrm{Ba}}_{0.15})\mathrm{Mn}{\mathrm{O}}_{3}$ thin films. In a $20\phantom{\rule{0.3em}{0ex}}\mathrm{nm}$ thick well-strained film with strongly enhanced ferromagnetism, new sharp satellite peak appeared at low energy site Mn $2{p}_{3∕2}$ main peak; whereas, broader signal was observed for unstrained $300\phantom{\rule{0.3em}{0ex}}\mathrm{nm}$ thickness. Cluster calculations revealed that intensity corresponded density state Fermi relating magnitude ferromagnetic order. The also agreed quantitatively square magnetization.