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Superconductivity in MgB_2 doped with Ti and C
R. H. T. Wilke, S. L. Bud'ko, P. C. Canfield +6
Measurements of the superconducting upper critical field, H_{c2}, and critical current density, J_c, have been carried out for MgB_2 doped with Ti and/or C in order to explore the…
The different development of the anisotropic upper critical field in MgB2 by aluminum and carbon doping
M. Angst, S. L. Bud'ko, R. H. T. Wilke +1
The temperature dependence of the upper critical field, Hc2, for both field directions in partially substituted polycrystalline MgB2 was determined. Whereas the suppression of Tc i…
Annealing-tuned Hall coefficient in single crystals of the YbNiBC heavy fermion
Sergey L. Bud'ko, Paul C. Canfield
We present temperature-dependent magneto-transport measurements on as-grown and annealed YbNiBC single crystals. Annealing causes drastic changes in the Hall coefficient, $…
Angular dependent planar metamagnetism in the hexagonal compounds TbPtIn and TmAgGe
E. Morosan, S. L. Bud'ko, P. C. Canfield
Detailed magnetization measurements, M(T,H,theta), were performed on single crystals of TbPtIn and TmAgGe (both members of the hexagonal Fe_2P/ZrNiAl structure type), for the magne…
YbGaGe: normal thermal expansion
Y. Janssen, S. Chang, B. K. Cho +5
We report evidence of the absence of zero thermal expansion in well-characterized high-quality polycrystalline samples of YbGaGe. High-quality samples of YbGaGe were produced from…
Anisotropy and internal field distribution of MgB2 in the mixed state at low temperatures
M. Angst, D. Di Castro, D. G. Eshchenko +11
Magnetization and muon spin relaxation on MgB2 were measured as a function of field at 2 K. Both indicate an inverse-squared penetration depth strongly decreasing with increasing f…