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Systematic effects of carbon doping on the superconducting properties of Mg(BC)
R. H. T. Wilke, S. L. Bud'ko, P. C. Canfield +3
The upper critical field, , of Mg(BC) has been measured in order to probe the maximum magnetic field range for superconductivity that can be attained by C d…
The Role of Nonlocality in the Pinning Properties of Borocarbides Materials
A. V. Silhanek, J. R. Thompson, L. Civale +2
An experimental review on the influence of nonlocal electrodynamics in the vortex pinning properties of non-magnetic borocarbide superconductors is presented. We show that the pinn…
Evidence for the Coexistence of Anisotropic Superconducting Gap and Nonlocal Effects in the Non-magnetic Superconductor LuNi2B2C
Tuson Park, Elbert E. M. Chia, M. B. Salamon +7
A study of the dependence of the heat capacity Cp(alpha) on field angle in LuNi2B2C reveals an anomalous disorder effect. For pure samples, Cp(alpha) exhibits a fourfold variation…
Thermodynamic and transport properties of RAgGe (R=Tb-Lu) single crystals
E. Morosan, S. L. Bud'ko, P. C. Canfield +2
Single crystals of the title compounds were grown out of an AgGe-rich ternary solution. Powder x-ray diffraction data confirmed the hexagonal AlNiZr-type structure ( sp…
Magnetic Field Induced Non-Fermi-Liquid Behavior in YbAgGe Single Crystal
S. L. Bud'ko, E. Q. T. Morosan, P. C. Canfield
Detailed anisotropic resistivity and heat capacity measurements down to ~0.4 K and up to 140 kOe are reported for a single crystalline YbAgGe. Based on these data YbAgGe, a member…
Absence of a boron isotope effect in the magnetic penetration depth of MgB
D. Di Castro, M. Angst, D. G. Eshchenko +11
The magnetic penetration depth in polycrystalline MgB for different boron isotopes (B/B) was investigated by transverse field muon spin rotation. No boro…
Lock-in transitions in ErNi2B2C and TbNi2B2C
C. Detlefs, C. Song, S. Brown +4
High resolution x-ray magnetic scattering has been used to determine the variation with temperature of the magnetic modulation vector, tau, in ErNi2B2C and TbNi2B2C to study the in…
Very Low Temperature Tunnelling Spectroscopy in the heavy fermion superconductor PrOsSb
H. Suderow, S. Vieira, J. D. Strand +2
We present scanning tunnelling spectroscopy measurements on the heavy fermion superconductor PrOsSb. Our results show that the superconducting gap opens over a large par…
Anisotropic magnetization, specific heat and resistivity of RFe2Ge2 single crystals
M. A. Avila, S. L. Bud'ko, P. C. Canfield
We have grown RFe2Ge2 single crystals for R = Y and ten members of the lanthanide series (Pr, Nd, Sm, Gd-Tm, Lu) using Sn flux as the solvent. The method yields clean, high quality…
Field-induced quantum critical point in CeCoIn_5
Johnpierre Paglione, M. A. Tanatar, D. G. Hawthorn +7
The resistivity of CeCoIn_5 was measured down to 20 mK in magnetic fields of up to 16 T. With increasing field, we observe a suppression of the non-Fermi liquid behavior, rho~T, an…
Two band/two gap superconductivity in carbon-substituted MgB2 evidenced by point-contact spectroscopy
P. Samuely, Z. Holanova, P. Szabo +4
The Andreev reflection measurements of the superconducting energy gap in the carbon-substituted MgB are presented. Despite the strong suppression of the transition temperature…
Magnetic Field Induced Density of States in Superconducting MgB: Measurement of Conduction Electron Spin-Susceptibility
F. Simon, A. Janossy, T. Feher +7
The magnetic field dependence of the spin-susceptibility, was measured in the superconducting state of high purity MgB fine powders below 1.3 T. was determine…
Study of low-energy magnetic excitations in single-crystalline CeIn3 by inelastic neutron scattering
W. Knafo, S. Raymond, B. Fak +3
Inelastic neutron scattering experiments were performed on single crystals of the heavy-fermion compound CeIn for temperatures below and above the Néel temperature, . In…
Intra-granular Ti precipitates in MgB2
M. J. Kramer, S. L. Bud'ko, P. C. Canfield +3
Superconducting magnesium diboride has been prepared with intra-granular TiB precipitates that have appropriate size and spacing for the pinning of superconducting vortices. The Ti…
Crystal Chemistry of Carbon-Substituted MgB2
M. Avdeev, J. D. Jorgensen, R. A. Ribeiro +2
Neutron powder diffraction has been used to characterize a sample of C-substituted MgB2 synthesized from Mg and B4C (with isotopically enriched 11B). The sample is multiphase, with…
Thermal Conductivity in Magnetic Superconductors
B. I. Belevtsev, B. D. Hennings, K. D. D. Rathnayaka +1
We present here an overview of thermal conductivity behavior in magnetic superconductors: rare-earth nickel borocarbide intermetallic compounds, RNi_{2}B_{2}C, and the 2122 rare-ea…