TY - JOUR
T1 - Superconducting state in the ternary stannide R3Co 4Sn13 (R = Ca, La)
AU - Kase, N.
AU - Hayamizu, H.
AU - Inoue, K.
AU - Akimitsu, J.
N1 - Funding Information:
This work was partially supported by ”High-Tech Research Center Project” for Private Universities and a Grant-in-Aid for Scientific Research from the Ministry of Education, Culture, Sports, Science and Technology, Japan. One of the authors (N. Kase) acknowledges the support of the Iwanami Fujukai Foundation.
PY - 2011/11
Y1 - 2011/11
N2 - We observed the superconducting and normal state by using the single crystals of R3 Co4Sn13 (R = Ca, La). The compounds crystallized in a Yb3Rh4Sn13-type structure with a cubic space group of Pm3̄n (No. 223). Superconducting state of R3Co4Sn13 was investigated by magnetic susceptibility, electrical resistivity, and specific heat measurements. From the electrical resistivity measurements under several magnetic fields, the upper critical field Hc2(0) was estimated. From the results, we discovered that the Hc2(T) curves cannot be described as the Wertharmer-Helfand-Hohenberg (WHH) prediction. Specific heat measurements indicated that these compounds were typical BCS superconductors, and categorized as strong-coupling superconductors.
AB - We observed the superconducting and normal state by using the single crystals of R3 Co4Sn13 (R = Ca, La). The compounds crystallized in a Yb3Rh4Sn13-type structure with a cubic space group of Pm3̄n (No. 223). Superconducting state of R3Co4Sn13 was investigated by magnetic susceptibility, electrical resistivity, and specific heat measurements. From the electrical resistivity measurements under several magnetic fields, the upper critical field Hc2(0) was estimated. From the results, we discovered that the Hc2(T) curves cannot be described as the Wertharmer-Helfand-Hohenberg (WHH) prediction. Specific heat measurements indicated that these compounds were typical BCS superconductors, and categorized as strong-coupling superconductors.
KW - Specific heat
KW - Superconductivity
KW - Transport properties
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U2 - 10.1016/j.physc.2011.05.034
DO - 10.1016/j.physc.2011.05.034
M3 - Article
AN - SCOPUS:80055018452
VL - 471
SP - 711
EP - 713
JO - Physica C: Superconductivity and its Applications
JF - Physica C: Superconductivity and its Applications
SN - 0921-4534
IS - 21-22
ER -