کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
5397307 | 1505778 | 2006 | 21 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Surface characterization of colossal magnetoresistive manganites La1âxSrxMnO3 using photoelectron spectroscopy
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موضوعات مرتبط
مهندسی و علوم پایه
شیمی
شیمی تئوریک و عملی
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: Surface characterization of colossal magnetoresistive manganites La1âxSrxMnO3 using photoelectron spectroscopy Surface characterization of colossal magnetoresistive manganites La1âxSrxMnO3 using photoelectron spectroscopy](/preview/png/5397307.png)
چکیده انگلیسی
We have studied the temperature and time dependence of the surface chemical composition and atomic structure of in situ fractured colossal magnetoresistive perovskites La1âxSrxMnO (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.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Electron Spectroscopy and Related Phenomena - Volume 153, Issues 1â2, August 2006, Pages 37-57
Journal: Journal of Electron Spectroscopy and Related Phenomena - Volume 153, Issues 1â2, August 2006, Pages 37-57
نویسندگان
N. Mannella, A. Rosenhahn, A. Nambu, B.C. Sell, B.S. Mun, S.-H. Yang, S. Marchesini, M. Watanabe, K. Ibrahim, S.B. Ritchey, Y. Tomioka, C.S. Fadley,