TY - JOUR
T1 - Electronic states of CeT2X20 (T:transition metal, X=Zn and Cd)
AU - Hirose, Yusuke
AU - Suzuki, Yoshitaka
AU - Honda, Fuminori
AU - Kulkarni, Ruta
AU - Thamizhavel, Arumugam
AU - Kawamura, Naomi
AU - Mizumaki, Masaichiro
AU - Simokasa, Ryohei
AU - Mimura, Kojiro
AU - Doto, Hiroshi
AU - Settai, Rikio
N1 - Funding Information:
This work was carried out under the Joint-Research Program of the International Research Center for Nuclear Materials Science, Institute for Materials Research, Tohoku University. A.T. and R.K. thank Department of Science and Technology, Government of India for the financial assistance (Grant: DST/INT/JSPS/P-196/2015). This study was partially supported by Grants-in-Aid for Scientific Research (C) (Grant No. 15K05195) from the Ministry of Education, Culture, Sports, Science, and Technology (MEXT), Japan. The PFY-XAS experiments were performed at the BL39XU of SPring-8 with the approval of the Japan Synchrotron Radiation Research Institute (JASRI) (Proposal Nos. 2016B1961, 2017A1857, 2017B1066, 2018A1047).
Publisher Copyright:
© 2018 Author(s).
PY - 2018/11/1
Y1 - 2018/11/1
N2 - The electronic state of single crystals of CeIr2(Zn1-xCdx)20 and CePt2Cd20 has been studied by measuring the electrical resistivity ρ and specific heat C. We found that by substituting Zn with Cd, the lattice parameter expands, and the electronic specific heat coefficient γ and A coefficient, which is T2-term in ρ, are enhanced. Our experimental results reveal that the electronic state of the intermediate valence compound CeIr2Zn20 changes to a moderately heavy fermion state due to the negative chemical pressure. On the other hand, C and ρ of CePt2Cd20 show a clear jump and an abrupt change of slope below 0.3 K, respectively, due to a magnetic transition. The relation between the hybridization strength and Ce valence state has also been investigated by X-ray absorption experiment.
AB - The electronic state of single crystals of CeIr2(Zn1-xCdx)20 and CePt2Cd20 has been studied by measuring the electrical resistivity ρ and specific heat C. We found that by substituting Zn with Cd, the lattice parameter expands, and the electronic specific heat coefficient γ and A coefficient, which is T2-term in ρ, are enhanced. Our experimental results reveal that the electronic state of the intermediate valence compound CeIr2Zn20 changes to a moderately heavy fermion state due to the negative chemical pressure. On the other hand, C and ρ of CePt2Cd20 show a clear jump and an abrupt change of slope below 0.3 K, respectively, due to a magnetic transition. The relation between the hybridization strength and Ce valence state has also been investigated by X-ray absorption experiment.
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U2 - 10.1063/1.5043138
DO - 10.1063/1.5043138
M3 - Article
AN - SCOPUS:85056906725
VL - 8
JO - AIP Advances
JF - AIP Advances
SN - 2158-3226
IS - 11
M1 - 115017
ER -