Photoelectron spectroscopy and soft X-ray absorption spectroscopy of pyrochlore molybdenum oxides R2Mo2O7 (R=Sm, Tb)

✍ Scribed by M. Sawada; M. Nagira; K. Yaji; K. Shimada; A. Kimura; K. Miyoshi; J. Takeuchi; H. Namatame; M. Taniguchi

• Publisher: Elsevier Science
• Year: 2004
• Tongue: English
• Weight: 183 KB
• Volume: 351
• Category: Article
• ISSN: 0921-4526
• DOI: 10.1016/j.physb.2004.06.038

✦ Synopsis

We have carried out photoelectron spectroscopy (PES) and soft X-ray absorption spectroscopy (XAS) for both Sm 2 Mo 2 O 7 and Tb 2 Mo 2 O 7 with synchrotron radiation. Valence band PES depending on excitation photon energy proves that electron structures of the valence bands are composed of 4f (Sm, Tb), 4d (Mo) and 2p (O) contributions. In the XAS, anti-bonding states corresponding to the Mo-O-Mo networks in the pyrochlore crystals are found, which are sensitive to the substitutions at the rare earth sites.