TY - JOUR
T1 - Low-temperature anomalies in magnetic, transport, and thermal properties of single-crystal CeRhSn with valence fluctuations
AU - Kim, S.
AU - Echizen, Y.
AU - Umeo, K.
AU - Kobayashi, S.
AU - Sera, M.
AU - Salamakha, S.
AU - Sologub, L.
AU - Takabatake, T.
AU - Chen, X.
AU - Tayama, T.
AU - Sakakibara, T.
AU - Jung, H.
AU - Maple, B.
PY - 2003/8/5
Y1 - 2003/8/5
N2 - Magnetic, transport, thermal, and crystallographic properties are reported for single crystals of CeRhSn crystallizing in the hexagonal ZrNiAl-type structure. We found high anisotropy in both electrical resistivity (ρa≈5ρc at 70 K) and magnetic susceptibility (χc≈10χa at 0.4 K), which is atypical for a valence-fluctuating Ce compound. At low temperatures, ρ(T) and χ(T) show power-law behaviors; ρa(T)∝T1.5 and ρc(T)∝T, and χa∝T−0.35 and χc∝T−1.1 down to 0.4 K. These behaviors and the rather large residual resistivity were not affected by long-term annealing. On cooling from 7 K to 0.5 K, the specific heat divided by temperature C/T increased as -ln T and saturated to a rather large value of 0.2 J/mol K2. These experimental results are discussed in relation to the possible atomic disorder.
AB - Magnetic, transport, thermal, and crystallographic properties are reported for single crystals of CeRhSn crystallizing in the hexagonal ZrNiAl-type structure. We found high anisotropy in both electrical resistivity (ρa≈5ρc at 70 K) and magnetic susceptibility (χc≈10χa at 0.4 K), which is atypical for a valence-fluctuating Ce compound. At low temperatures, ρ(T) and χ(T) show power-law behaviors; ρa(T)∝T1.5 and ρc(T)∝T, and χa∝T−0.35 and χc∝T−1.1 down to 0.4 K. These behaviors and the rather large residual resistivity were not affected by long-term annealing. On cooling from 7 K to 0.5 K, the specific heat divided by temperature C/T increased as -ln T and saturated to a rather large value of 0.2 J/mol K2. These experimental results are discussed in relation to the possible atomic disorder.
UR - http://www.scopus.com/inward/record.url?scp=0141595057&partnerID=8YFLogxK
U2 - 10.1103/PhysRevB.68.054416
DO - 10.1103/PhysRevB.68.054416
M3 - 学術論文
AN - SCOPUS:0141595057
SN - 1098-0121
VL - 68
JO - Physical Review B - Condensed Matter and Materials Physics
JF - Physical Review B - Condensed Matter and Materials Physics
IS - 5
ER -