Ni, N., Tillman, M. E., Kracher, A., Hannahs, S. T., Bud'ko, S. L., ...
Single crystalline samples of Ba(Fe$_{1-x}$Co$_x$)$_2$As$_2$ with $x < 0.12$ have been grown and characterized via microscopic, thermodynamic and transport measurements. With increasing Co...
A versatile and compact capacitive dilatometer (2006)
Schmiedeshoff, G. M., Lounsbury, A. W., Luna, D. J., Tracy, S. J., Schramm, A. J., Tozer, S. W., ...
We describe the design, construction, calibration, and operation of a relatively simple differential capacitive dilatometer suitable for measurements of thermal expansion and magnetostriction from...
Torikachvili, M. S., Jia, S., Mun, E. D., Hannahs, S. T., Black, R. C., Neils, W. K., ...
Heavy fermion compounds represent one of the most strongly correlated forms of electronic matter and give rise to low temperature states that range from small moment ordering to exotic...
Effects of Neutron Irradiation on Carbon Doped MgB2 Wire Segments (2005)
Wilke, R. H. T., Bud'ko, S. L., Canfield, P. C., Finnemore, D. K., Suplinskas, Raymond J., Farmer, J., ...
We have studied the evolution of superconducting and normal state properties of neutron irradiated Mg(B$_{.962}$C$_{.038}$)$_2$ wire segments as a function of post exposure annealing time and...
Superconducting and Normal State Properties of Neutron Irradiated MgB2 (2005)
Wilke, R. H. T., Bud'ko, S. L., Canfield, P. C., Famer, J., Hannahs, S. T.
We have performed a systematic study of the evolution of the superconducting and normal state properties of neutron irradiated MgB$_2$ wire segments as a function of fluence and post exposure...
Synthesis of Mg(B$_{1-x}$C$_x$)$_2$ Powders (2005)
Wilke, R. H. T., Bud'ko, S. L., Canfield, P. C., Finnemore, D. K., Hannahs, S. T.
We have synthesized bulk Mg(B$_{1-x}$C$_x$)$_2$ from a mixture of elemental Mg, B, and the binary compound B$_4$C. Carbon incorporation was dramatically improved by a two step reaction process at an...
Superconductivity in MgB_2 doped with Ti and C (2004)
Wilke, R. H. T., Bud'ko, S. L., Canfield, P. C., Kramer, M. J., Wu, Y. Q., Finnemore, D. K., ...
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 problems...
Magnetotransport and Superconductivity of Alpha-Uranium (2004)
Schmiedeshoff, G. M., Dulguerova, D., Quan, J., Touton, S., Mielke, C. H., Christianson, A. D., ...
We have measured the electrical resistivity, magnetoresistance, and Hall effect on several new single crystal samples and one polycrystalline sample of alpha-uranium. The residual resistivity ratios...
Wilke, R. H. T., Bud'ko, S. L., Canfield, P. C., Finnemore, D. K., Suplinskas, Raymond J., Hannahs, S. T.
The upper critical field, $H_{c2}$, of Mg(B$_{1-x}$C$_x$)$_2$ has been measured in order to probe the maximum magnetic field range for superconductivity that can be attained by C doping. Carbon doped...
Comment on "First-Order Superconducting Phase Transition in CeCoIn5" (2003)
Fortune, N. A., Radovan, H. A., Hannahs, S. T., Murphy, T. P.
The Clogston estimate for the Pauli limit used in the original comment (and the paper to which it referred) neglects important effects that lead to a significant enhancement of the Pauli limit in...
Unconventional superconductivity in CeCoIn5 with magnetic texture and orbital quantization (2003)
Radovan, H. A., Fortune, N. A., Murphy, T. P., Hannahs, S. T., Palm, E. C., Tozer, S. W., ...
A sufficiently high magnetic field applied to a superconductor will act on both the charge and the spin of the individual electrons breaking up the Cooper pairs. If the spin effect dominates, the...
Yang, I., Kang, W., Hannahs, S. T., Pfeiffer, L. N., West, K. W.
We have observed an anomalous shift of the high field reentrant insulating phases in a two-dimensional electron system (2DES) tightly confined within a narrow GaAs/AlGaAs quantum well. Instead of the...
Search for a quantum phase transition in U(Pt_(1-x)Pd_x)_3 (1999)
Graf, M. J., Keizer, R. J., De Visser, A., Hannahs, S. T.
Pd in U(Pt_{1-x}Pd_x)_3 suppresses the superconducting T_c to 0 K at critical concentration x_c of 0.007 and induces a conventional AFM state for x > x_c. The resistivity below 1 K shows a deviation...
Torikachvili, M. S., Jia, S., Mun, E. D., Hannahs, S. T., Black, R. C., Neils, W. K., ...
Heavy fermion compounds represent one of the most strongly correlated forms of electronic matter and give rise to low temperature states that range from small moment ordering to exotic...