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Effects of Boron Purity, Mg Stoichiometry and Carbon Substitution on Properties of Polycrystalline MgB
R. A. Ribeiro, S. L. Bud'ko, C. Petrovic +1
By synthesizing MgB using boron of different nominal purity we found values of the residual resistivity ratio () from 4 to 20, which covers almost a…
Field-Induced Quantum Critical Point in CeCoIn5
Johnpierre Paglione, M. A. Tanatar, D. G. Hawthorn +7
The resistivity of the heavy-fermion superconductor CeCoIn5 was measured as a function of temperature, down to 25 mK and in magnetic fields of up to 16 T applied perpendicular to t…
Hexagonal and Square Flux Line Lattices in CeCoIn5
M. R. Eskildsen, C. D. Dewhurst, B. W. Hoogenboom +2
Using small-angle neutron scattering, we have imaged the magnetic flux line lattice (FLL) in the d-wave heavy-fermion superconductor CeCoIn5. At low fields we find a hexagonal FLL.…
Synthesis and Properties of YbB2
M. A. Avila, S. L. Bud'ko, C. Petrovic +4
We report temperature and field dependent measurements of the magnetic susceptibility, specific heat and resistivity of sintered YbB2 pellets, prepared via two distinct reaction ro…
The magnetic state of Yb in Kondo-lattice YbNi2B2C
A. T. Boothroyd, J. P. Barratt, P. Bonville +4
We report neutron scattering experiments performed to investigate the dynamic magnetic properties of the Kondo-lattice compound YbNi2B2C. The spectrum of magnetic excitations is fo…
Observation of vortex structure in MgB single crystals by Bitter decoration technique
L. Ya. Vinnikov, J. Karpinski, S. M. Kazakov +4
We report the observation of superconducting vortices in pure and lightly Al doped MgB single crystals. Low field experiments allow for the estimation of the London penetration…