TY - JOUR
T1 - Non-magnetic-doublet ground state in PrInCu2; Enhancement of the specific-heat coefficient at low temperatures
AU - Ikeno, Tsuyoshi
AU - Isikawa, Yosikazu
AU - Kuwai, Tomohiko
AU - Mitsuda, Akihiro
AU - Mizushima, Toshio
PY - 2006/5/1
Y1 - 2006/5/1
N2 - Specific heat, C, thermoelectric power, S, and magnetic susceptibility, χ, of a cubic Heusler compound PrInCu2 have been carefully examined. The C / T shows an enhancement with decreasing T and reaches 1.1 J / mol K2 at 0.5 K, while the S / T does not show any enhancement at temperatures below 1 K. These observations suggest that the conduction electrons at EF do not correlate with the 4f electrons of Pr atoms and that the enhancement of C / T is not due to the Kondo effect. To explain the enhancement of the C / T at low temperatures, a model that the non-magnetic doublet of PrInCu2 is lifted by quadrupole fluctuations was proposed. From the analysis of overall features of C ( T ) and χ ( T ), the energy scheme of 4f electrons was derived.
AB - Specific heat, C, thermoelectric power, S, and magnetic susceptibility, χ, of a cubic Heusler compound PrInCu2 have been carefully examined. The C / T shows an enhancement with decreasing T and reaches 1.1 J / mol K2 at 0.5 K, while the S / T does not show any enhancement at temperatures below 1 K. These observations suggest that the conduction electrons at EF do not correlate with the 4f electrons of Pr atoms and that the enhancement of C / T is not due to the Kondo effect. To explain the enhancement of the C / T at low temperatures, a model that the non-magnetic doublet of PrInCu2 is lifted by quadrupole fluctuations was proposed. From the analysis of overall features of C ( T ) and χ ( T ), the energy scheme of 4f electrons was derived.
KW - Heusler compound
KW - Non-magnetic doublet
KW - PrInCu
KW - Specific heat
KW - Thermoelectric power
UR - http://www.scopus.com/inward/record.url?scp=33747670256&partnerID=8YFLogxK
U2 - 10.1016/j.physb.2006.01.190
DO - 10.1016/j.physb.2006.01.190
M3 - 学術論文
AN - SCOPUS:33747670256
SN - 0921-4526
VL - 378-380
SP - 677
EP - 678
JO - Physica B: Condensed Matter
JF - Physica B: Condensed Matter
IS - SPEC. ISS.
ER -