Univ Calif Davis, Dept Phys, Davis, CA 95616 USA
; LBNL, Mat Sci Div, Berkeley, CA 94720 USA
; Univ Tokyo, Dept Chem, Tokyo 1130033, Japan
; RIKEN, Hyogo 6795148, Japan
; Beijing Synchrotron Radiat Lab, Beijing, Peoples R China
; AIST, Tsukuba, Ibaraki 3058562, Japan
We have studied the temperature and time dependence of the surface chemical composition and atomic structure of in situ fractured colossal magnetoresistive perovskites La1-xSrxMnO (x = 0.3, 0.4) using core-level photoelectron spectroscopy and diffraction, simultaneous with observing marked changes in both core and valence electronic structure on going above the Curie temperature [N. Mannella et al., Phys. Rev. Lett. 92 (2004) 166401]. Stoichiometric analyses via core-level intensity ratios show that the near-surface composition is very nearly the same as that of the nominal (bulk) stoichiometry and further show that, during duration of our experiments, the degree of surface stoichiometry alteration or contamination has been minimal. The effects of photoelectron diffraction on such analyses are also explored. We comment on the degree to which near-surface composition or atomic-structure alterations might influence spectroscopic investigations of these manganites, or other strongly correlated materials. (c) 2006 Elsevier B.V. All rights reserved.
Mannella, N,Rosenhahn, A,Nambu, A,et al. Surface characterization of colossal magnetoresistive manganites La1-xSrxMnO3 using photoelectron spectroscopy[J]. JOURNAL OF ELECTRON SPECTROSCOPY AND RELATED PHENOMENA,2006,153(1-2):37-57.
Mannella, N.,Rosenhahn, A.,Nambu, A.,Sell, BC.,Mun, BS.,...&奎热西.(2006).Surface characterization of colossal magnetoresistive manganites La1-xSrxMnO3 using photoelectron spectroscopy.JOURNAL OF ELECTRON SPECTROSCOPY AND RELATED PHENOMENA,153(1-2),37-57.
Mannella, N,et al."Surface characterization of colossal magnetoresistive manganites La1-xSrxMnO3 using photoelectron spectroscopy".JOURNAL OF ELECTRON SPECTROSCOPY AND RELATED PHENOMENA 153.1-2(2006):37-57.