Superconducting properties of CdCNi3

被引:74
作者
Uehara, Masatomo [1 ]
Yamazaki, Takahiro
Kori, Tatsuya
Kashida, Takeshi
Kimishima, Yoshihide
Hase, Izumi
机构
[1] Yokohama Natl Univ, Fac Engn, Dept Phys, Hodogaya Ku, Yokohama, Kanagawa 2408501, Japan
[2] AIST, Nanoelect Res Inst, Tsukuba, Ibaraki 3058568, Japan
关键词
CdCNi3; superconductivity; superconducting parameter; specific heat measurement; FLAPW band calculation;
D O I
10.1143/JPSJ.76.034714
中图分类号
O4 [物理学];
学科分类号
0702 ;
摘要
CdCNi3 is a newly synthesized superconductor with T-c = 2.5 - 3.2 K. The crystal has the same pefovskite-type structure as MgCNi3 but the lattice constant is similar to 1% larger than that of MgCNi3. For this material. superconducting parameters, lower critical field H-cl(0), upper critical field H-c2(0), coherence length xi(0), penetration depth lambda(0), Ginzburg-Landau parameter k(0), electronic specific heat coefficient y, and Debye temperature Theta(D) have been experimentally determined. Also, full-potential augmented plane wave band calculation has been performed for CdCNi3. From experimental and band calculation results, it has been suggested that the smaller density of states at the Fermi energy and enhanced ferromagnetic correlation reduce the T-c of CdCNi3, compared with that of MgCNi3.
引用
收藏
页数:5
相关论文
共 20 条
[1]   Carbon concentration dependence of the superconducting transition temperature and structure of MgCxNi3 [J].
Amos, TG ;
Huang, Q ;
Lynn, JW ;
He, T ;
Cava, RJ .
SOLID STATE COMMUNICATIONS, 2002, 121 (2-3) :73-77
[2]  
HASE I, UNPUB
[3]   Superconductivity in the non-oxide perovskite MgCNi3 [J].
He, T ;
Huang, Q ;
Ramirez, AP ;
Wang, Y ;
Regan, KA ;
Rogado, N ;
Hayward, MA ;
Haas, MK ;
Slusky, JS ;
Inumara, K ;
Zandbergen, HW ;
Ong, NP ;
Cava, RJ .
NATURE, 2001, 411 (6833) :54-56
[4]   A first-principles comparison of the electronic properties of MgCyNi3 and ZnCyNi3 alloys [J].
Joseph, P. Jiji Thomas ;
Singh, Prabhakar P. .
JOURNAL OF PHYSICS-CONDENSED MATTER, 2006, 18 (23) :5333-5347
[5]   Exchange-enhanced Pauli spin paramagnetism in nanocrystalline Ni3Al [J].
Kaul, SN ;
Semwal, A ;
Schaefer, HE .
PHYSICAL REVIEW B, 2000, 62 (21) :13892-13895
[6]   Microstructural features of MgxCyNi3 superconducting materials -: art. no. 052506 [J].
Li, JQ ;
Wu, LJ ;
Li, L ;
Zhu, Y .
PHYSICAL REVIEW B, 2002, 65 (05) :525061-525064
[7]   BCS-like superconductivity in MgCNi3 -: art. no. 052501 [J].
Lin, JY ;
Ho, PL ;
Huang, HL ;
Lin, PH ;
Zhang, YL ;
Yu, RC ;
Jin, CQ ;
Yang, HD .
PHYSICAL REVIEW B, 2003, 67 (05)
[8]   Experimental determination of superconducting parameters for the intermetallic perovskite superconductor MgCNi3 -: art. no. 094502 [J].
Mao, ZQ ;
Rosario, MM ;
Nelson, KD ;
Wu, K ;
Deac, IG ;
Schiffer, P ;
Liu, Y ;
He, T ;
Regan, KA ;
Cava, RJ .
PHYSICAL REVIEW B, 2003, 67 (09)
[9]   Coexistence of superconductivity and ferromagnetism in the d-band metal ZrZn2 [J].
Pfleiderer, C ;
Uhlarz, M ;
Hayden, SM ;
Vollmer, R ;
von Löhneysen, H ;
Bernhoeft, NR ;
Lonzarich, GG .
NATURE, 2001, 412 (6842) :58-61
[10]   Evidence for unconventional superconductivity in the nonoxide perovskite MgCNi3 from penetration depth measurements -: art. no. 180502 [J].
Prozorov, R ;
Snezhko, A ;
He, T ;
Cava, RJ .
PHYSICAL REVIEW B, 2003, 68 (18)