CNR ExploRA

Articolo in rivista, 2007, ENG, 10.1103/PhysRevB.75.014422

Bulk electronic properties of the bilayered manganite La1.2Sr1.8Mn2O7 from hard-x-ray photoemission

Offi, F; Torelli, P; Sacchi, M; Lacovig, P; Fondacaro, A; Paolicelli, G; Huotari, S; Monaco, G; Fadley, CS; Mitchell, JF; Stefani, G; Panaccione, G

Univ Roma Tre, CNISM, I-00146 Rome, Italy; Univ Roma Tre, Dipartimento Fis, I-00146 Rome, Italy; CNR, INFM S3, I-41100 Modena, Italy; Univ Paris 06, UMR 7614, Lab Chim Phys Matiere & Rayonnement, F-75005 Paris, France; Synchrotron SOLEIL, F-91142 Gif Sur Yvette, France; Univ Paris 06, UMR 7614, F-75005 Paris, France; Sincrotrone Trieste, SCpA, I-34012 Trieste, Italy; European Synchrotron Radiat Facil, F-38042 Grenoble, France; Univ Calif Davis, Dept Phys, Davis, CA 95616 USA; Lawrence Berkeley Natl Lab, Div Sci Mat, Berkeley, CA 94720 USA; Argonne Natl Lab, Div Sci Mat, Argonne, IL 60439 USA; CNR, INFM, TASC, Lab Nazl, I-34012 Trieste, Italy

We have performed hard-x-ray photoemission experiments at photon energy close to 6 keV on the ferromagnetic bilayered manganite La1.2Sr1.8Mn2O7 across its transition temperature T-C. Differences in both core level and valence band spectra have been observed as a function of temperature: We correlate the energy shift of the O 1s peak with a charge-transfer associated with the structural change taking place at the transition. A prominent shoulder on the low binding energy side of the Mn 2p core level that is observed below TC is tentatively ascribed to increased nonlocal screening in the ordered ferromagnetic phase.

Physical review. B, Condensed matter and materials physics 75 (1), pp. 014422–?