TY - JOUR
T1 - X-ray absorption spectroscopy and novel electronic properties in heavy fermion compounds YbT2Zn20 (T
T2 - 2014 International Conference on Strongly Correlated Electron Systems, SCES 2014
AU - Honda, Fuminori
AU - Hirose, Yusuke
AU - Miyake, Atsushi
AU - Mizumaki, Masaichiro
AU - Kawamura, Naomi
AU - Tsutsui, Satoshi
AU - Watanuki, Tetsu
AU - Watanabe, Shinji
AU - Takeuchi, Tetsuya
AU - Settai, Rikio
AU - Aoki, Dai
AU - O'Nuki, Yoshichika
PY - 2014
Y1 - 2014
N2 - YbT2Zn20 (T: Rh and Ir), which crystallizes in the cubic CeCr2Al20-type structure, is a member of the well-known heavy fermion compounds, indicating a huge electronic specific heat coefficient γ ≃ 500 mJ/(K2·mol). We have measured temperature and magnetic field dependences of Yb valence in YbT2Zn20 (T: Rh and Ir) at ambient pressure by the Lm edge x- ray absorption spectroscopy in order to investigate the valence state of Yb 4f electrons in these compounds. It is revealed that the Yb valence in both compounds significantly decreases with temperature below about 100 K and increases with increasing magnetic field at low temperatures in contrast to the case of YbCo2Zn20.
AB - YbT2Zn20 (T: Rh and Ir), which crystallizes in the cubic CeCr2Al20-type structure, is a member of the well-known heavy fermion compounds, indicating a huge electronic specific heat coefficient γ ≃ 500 mJ/(K2·mol). We have measured temperature and magnetic field dependences of Yb valence in YbT2Zn20 (T: Rh and Ir) at ambient pressure by the Lm edge x- ray absorption spectroscopy in order to investigate the valence state of Yb 4f electrons in these compounds. It is revealed that the Yb valence in both compounds significantly decreases with temperature below about 100 K and increases with increasing magnetic field at low temperatures in contrast to the case of YbCo2Zn20.
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U2 - 10.1088/1742-6596/592/1/012021
DO - 10.1088/1742-6596/592/1/012021
M3 - Conference article
AN - SCOPUS:84925326115
VL - 592
JO - Journal of Physics: Conference Series
JF - Journal of Physics: Conference Series
SN - 1742-6588
IS - 1
M1 - 012021
Y2 - 7 July 2014 through 14 July 2014
ER -