Temperature dependent X-ray absorption spectroscopy of the valence transition in EuNi2(SiO.20Ge0.80)2
We investigate the temperature induced mixed valence transition in EuNi2(SiO.2Ge0.8)2 using Eu 3d-4f X-ray absorption spectroscopy (XAS). The unoccupied 4f states are studied as a function of temperature (27-120K), across the critical valence temperature, . The Eu 3d-4f X-ray absorption spectra show...
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| Veröffentlicht in: | Physica. B, Condensed matter Condensed matter, 2006-05, Vol.378-380, p.681-682 |
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| container_title | Physica. B, Condensed matter |
| container_volume | 378-380 |
| creator | Yamamoto, Kazuya Horiba, Koji Taguchi, Munetaka Matsunami, Masaharu Kamakura, Nozomu Takata, Yasutaka Chainani, Ashish Mimura, Kojiro Shiga, Masayuki Wada, Hirofumi Senba, Yasunori Ohashi, Haruhiko Shin, Shik |
| description | We investigate the temperature induced mixed valence transition in EuNi2(SiO.2Ge0.8)2 using Eu 3d-4f X-ray absorption spectroscopy (XAS). The unoccupied 4f states are studied as a function of temperature (27-120K), across the critical valence temperature, . The Eu 3d-4f X-ray absorption spectra show systematic changes of the mixed valency with temperature. The Eu2+ and Eu3+ spectral features match very well with atomic multiplet calculations. The observed non-integral mean valence changes systematically from 2.70+/-0.03 (27K) to 2.35+/-0.03 (120K), consistent with bulk-sensitive measurements. |
| doi_str_mv | 10.1016/j.physb.2006.01.507 |
| format | Article |
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| title | Temperature dependent X-ray absorption spectroscopy of the valence transition in EuNi2(SiO.20Ge0.80)2 |
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