TY - JOUR
T1 - Superconductivity in W5SiB2 with the T2 phase structure
AU - Fukuma, Michinori
AU - Kawashima, Kenji
AU - Maruyama, Masaki
AU - Akimitsu, Jun
N1 - Copyright:
Copyright 2011 Elsevier B.V., All rights reserved.
PY - 2011/2
Y1 - 2011/2
N2 - We report here the superconducting properties of W5SiB 2. W5SiB2 has a T2 phase structure with the space group I4/mcm. Magnetic susceptibility, electrical resistivity, and specific heat data show that W5SiB2 is a superconductor with a transition temperature (Tc) of 5.8 K. The magnetization versus magnetic field (M-H) curve shows the typical type-II superconducting behavior. The estimated lower critical field Hc1(0) and upper critical field Hc2(0) are about 120 and 5200 Oe, respectively. The penetration depth λ and coherence length ξ are calculated to be approximately 210 and 25 nm, respectively, using Ginzburg-Landau (GL) equations. The estimated Sommerfeld coefficient γN is 12.8 mJ/(molK2). The normalized specific heat jump ΔC/γNTc is estimated to be about 1.49, which is near the value predicted by the BCS theory in the weak-coupling limit, i.e., ΔC/γNTc = 1:43. This finding indicates that superconductivity in W5SiB 2 exists within the week-coupling regime.
AB - We report here the superconducting properties of W5SiB 2. W5SiB2 has a T2 phase structure with the space group I4/mcm. Magnetic susceptibility, electrical resistivity, and specific heat data show that W5SiB2 is a superconductor with a transition temperature (Tc) of 5.8 K. The magnetization versus magnetic field (M-H) curve shows the typical type-II superconducting behavior. The estimated lower critical field Hc1(0) and upper critical field Hc2(0) are about 120 and 5200 Oe, respectively. The penetration depth λ and coherence length ξ are calculated to be approximately 210 and 25 nm, respectively, using Ginzburg-Landau (GL) equations. The estimated Sommerfeld coefficient γN is 12.8 mJ/(molK2). The normalized specific heat jump ΔC/γNTc is estimated to be about 1.49, which is near the value predicted by the BCS theory in the weak-coupling limit, i.e., ΔC/γNTc = 1:43. This finding indicates that superconductivity in W5SiB 2 exists within the week-coupling regime.
KW - Superconductivity
KW - T phase
KW - WSiB
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U2 - 10.1143/JPSJ.80.024702
DO - 10.1143/JPSJ.80.024702
M3 - Article
AN - SCOPUS:79951615881
VL - 80
JO - Journal of the Physical Society of Japan
JF - Journal of the Physical Society of Japan
SN - 0031-9015
IS - 2
M1 - 024702
ER -