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Strong coupling between 4f valence instability and 3d ferromagnetism in Yb(x)Fe4Sb12 studied by resonant x-ray emission spectroscopy.
| Content Provider | Semantic Scholar |
|---|---|
| Author | Yamaoka, Hitoshi Jarrige, Ignace Tsujii, Naohito Lin, Jung-Fu Ikeno, Tsuyoshi Isikawa, Yosikazu Nishimura, Katsuhiko Higashinaka, Ryuji Sato, Hideyuki Hiraoka, Nozomu Ishii, Hirofumi |
| Copyright Year | 2011 |
| Abstract | We have investigated the temperature and pressure dependency of the electronic structure of Yb-filled skutterudites, YbFe(4)Sb(12) and Yb(0.88)Fe(4)Sb(12), using x-ray absorption and emission spectroscopies. An anomalous increase of the Yb valence, which is beyond the conventional Anderson model picture, is found to coincide with the onset of the ferromagnetic order in the x=0.88 sample below 20 K. In contrast, the nearly stoichiometric YbFe(4)Sb(12) is paramagnetic down to 2 K and the Yb valence is independent of temperature. This evidences a close interplay between the magnetic instability of the Fe 3d electrons and valence instability of the Yb 4f electrons. Under pressure, a sudden increase in the valence is found to occur around 13 GPa for YbFe(4)Sb(12) and 17 GPa for Yb(0.88)YbFe(4)Sb(12). |
| Starting Page | 177203 |
| Ending Page | 177203 |
| Page Count | 1 |
| File Format | PDF HTM / HTML |
| Alternate Webpage(s) | http://www.jsg.utexas.edu/lin/files/YamaokaYbxFe4Sb12PRL2011.pdf |
| PubMed reference number | 22107574v1 |
| Volume Number | 107 |
| Issue Number | 17 |
| Journal | Physical review letters |
| Language | English |
| Access Restriction | Open |
| Subject Keyword | Electrons Fill Iron Roentgen Rays |
| Content Type | Text |
| Resource Type | Article |
