Superconductivity in LnFePO (Ln = La, Pr, and Nd) single crystals (2008)
Baumbach, R. E., Hamlin, J. J., Shu, L., Zocco, D. A., Crisosto, N. M., Maple, M. B.
Single crystals of the compounds LaFePO, PrFePO, and NdFePO have been prepared by means of a flux growth technique and studied by electrical resistivity, magnetic susceptibility and specific heat...
High-pressure, transport, and thermodynamic properties of CeTe3 (2008)
Zocco, D. A., Hamlin, J. J., Sayles, T. A., Maple, M. B., Fisher, I. R.
We have performed a series of high-pressure electrical resistivity experiments in CeTe3 single crystals. At ambient pressure, CeTe3 is known to order magnetically near 3 K. We find that the magnetic...
Pressure induced superconductivity in the charge density wave compound TbTe3 (2008)
Hamlin, J. J., Zocco, D. A., Sayles, T. A., Maple, M. B., Fisher, I. R.
A series of high-pressure resistivity measurements on single crystals of TbTe3 reveal a complex phase diagram involving the interplay of superconducting, antiferromagnetic and charge density wave...
Charge dynamics in the normal state of the iron oxypnictide superconductor LaFePO (2008)
Qazilbash, M. M., Hamlin, J. J., Baumbach, R. E., Maple, M. B., Basov, D. N.
We present the first infrared and optical study in the normal state of ab-plane oriented single crystals of the iron-oxypnictide superconductor LaFePO. We find that this material is a low carrier...
Comparison of the pressure dependences of Tc in the trivalent d-electron superconductors (2008)
Debessai, M., Hamlin, J. J., Schilling, J. S.
Whereas dhcp La superconducts at ambient pressure with Tc = 5 K, the other trivalent d-electron metals Sc, Y, and Lu only superconduct if high pressures are applied. Earlier measurements of the...
Superconductivity in single crystals of LaFePO (2008)
Hamlin, J. J., Baumbach, R. E., Zocco, D. A., Sayles, T. A., Maple, M. B.
Single crystals of the compound LaFePO were prepared using a flux growth technique at high temperatures. Electrical resistivity measurements reveal metallic behavior and a resistive transition to the...
Zocco, D. A., Hamlin, J. J., Baumbach, R. E., Maple, M. B., McGuire, M. A., Sefat, A. S., ...
We have performed several high-pressure resistivity experiments on the recently discovered superconductors La[O_{0.89}F_{0.11}]FeAs and Ce[O_{0.88}F_{0.12}]FeAs. At ambient pressure, these materials...
Pressure-induced Superconductivity in CaLi2 (2007)
Matsuoka, T., Debessai, M., Hamlin, J. J., Gangopadhyay, A. K., Schilling, J. S.
A search for superconductivity has been carried out on the hexagonal polymorph of Laves-phase CaLi2, a compound for which Feng, Ashcroft, and Hoffmann predict highly anomalous behavior under...
Pressure-Induced Superconductivity in Sc to 74 GPa (2007)
Hamlin, J. J., Schilling, J. S.
Using a diamond anvil cell with nearly hydrostatic helium pressure medium we have significantly extended the superconducting phase diagram Tc(P) of Sc, the lightest of all transition metals. We find...
Studies on the Weak Itinerant Ferromagnet SrRuO3 under High Pressure to 34 GPa (2006)
Hamlin, J. J., Deemyad, S., Schilling, J. S., Jacobsen, M. K., Kumar, R. S., Cornelius, A. L., ...
The dependence of the Curie temperature Tc on nearly hydrostatic pressure has been determined to 17.2 GPa for the weak itinerant ferromagnetic SrRuO3 in both polycrystalline and single-crystalline...
Superconductivity at 17 K in Yttrium Metal under Nearly Hydrostatic Pressures to 89 GPa (2006)
Hamlin, J. J., Tissen, V. G., Schilling, J. S.
In an experiment in a diamond anvil cell utilizing helium pressure medium, yttrium metal displays a superconducting transition temperature which increases monotonically from Tc ? 3.5 K at 30 GPa to...
Tomita, T., Deemyad, S., Hamlin, J. J., Schilling, J. S., Tissen, V. G., Veal, B. W., ...
The ability of single grain boundaries in YBa2Cu3Ox bicrystalline rings to carry electrical current is found to be significantly enhanced under hydrostatic pressure. Nearly hydrostatic pressures are...
Deemyad, S., Tomita, T., Hamlin, J. J., Beckett, B. R., Schilling, J. S., Hinks, D. G., ...
The dependence of Tc for MgB2 on purely hydrostatic or nearly hydrostatic pressure has been determined to 23 GPa for single-crystalline and to 32 GPa for polycrystalline samples, and found to be in...
The Dependence of Tc on Hydrostatic Pressure in Superconducting MgB2 (2001)
Tomita, T., Hamlin, J. J., Schilling, J. S., Hinks, D. G., Jorgensen, J. D.
The dependence of Tc on hydrostatic (He-gas) pressure has been determined to 0.7 GPa. We find that Tc decreases linearly and reversibly under pressure at the rate dTc/dP = -1.11 +- 0.02 K/GPa. These...