Mn K-edge X-ray absorption spectroscopy (XAS) studies of La{sub 1{minus}x}Sr{sub x}MnO{sub 3}
- Northern Illinois Univ., DeKalb, IL (United States). Dept. of Physics
- Argonne National Lab., IL (United States). Materials Science Div.
- Illinois Inst. of Tech., Chicago, IL (United States)
- Univ. of Illinois, Chicago, IL (United States). Dept. of Physics
Systematic Mn K-edge x-ray absorption spectroscopy (XAS) measurements on samples of La{sub 1{minus}x}Sr{sub x}MnO{sub 3}, which are precursors to colossal magnetoresistive (CMR) materials, are reported. Detailed results on the edge or chemical shift as a function of Sr concentration (hole doping) and sample preparation (air vs. oxygen annealed), are discussed. For comparison, a systematic XANES study of the Mn K-edge energy shift, denoting valence change in Mn, has been made in standard manganese oxide systems. Contrary to expectations, the variation in near-edge energies for Mn in La{sub 0.725}Sr{sub 0.275}MnO{sub 3} were small when compared to the difference between that for manganese oxide standards of nominal valence of +3 and +4 (Mn{sub 2}O{sub 3} and MnO{sub 2}).
- Research Organization:
- Argonne National Lab. (ANL), Argonne, IL (United States)
- Sponsoring Organization:
- Office of Naval Research, Washington, DC (United States); USDOE, Washington, DC (United States)
- DOE Contract Number:
- W-31109-ENG-38
- OSTI ID:
- 323396
- Report Number(s):
- CONF-971201-; ISBN 1-55899-399-1; TRN: 99:004227
- Resource Relation:
- Conference: 1997 fall meeting of the Materials Research Society, Boston, MA (United States), 1-5 Dec 1997; Other Information: PBD: 1998; Related Information: Is Part Of Science and technology of magnetic oxides; Hundley, M.F. [ed.] [Los Alamos National Lab., NM (United States)]; Nickel, J.H. [ed.] [Hewlett-Packard Labs., Palo Alto, CA (United States)]; Ramesh, R. [ed.] [Univ. of Maryland, College Park, MA (United States)]; Tokura, Yoshinori [ed.] [Univ. of Tokyo (Japan)]; PB: 375 p.; Materials Research Society symposium proceedings, Volume 494
- Country of Publication:
- United States
- Language:
- English
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