951 citations · 3k across the 14 of their papers we have counts for
11 papers · 1 filter
Charge-ordering, commensurability and metallicity in the phase diagram of layered Na(x)CoO(2)
Maw Lin Foo, Yayu Wang, Satoshi Watauchi +4
The phase diagram of non-hydrated Na(x)CoO(2) has been determined by changing the Na content x using a series of chemical reactions. As x increases from 0.3, the ground state goes…
Evidence for Unconventional Superconductivity in the Non-Oxide Perovskite from Penetration Depth Measurements
R. Prozorov, A. Snezhko, T. He +1
The London penetration depth, , was measured in polycrystalline powders of the non-oxide perovskite superconductor by using a sensitive tunnel-diode resona…
MgB2 Energy Gap Determination by Scanning Tunneling Spectroscopy
T. W. Heitmann, S. D. Bu, D. M. Kim +13
We report scanning tunneling spectroscopy (STS) measurements of the gap properties of both ceramic MgB2 and c-axis oriented epitaxial MgB2 thin films. Both show a temperature depen…
The Reactivity of MgB2 with Common Substrate and Electronic Materials
T. He, John M. Rowell, R. J. Cava
The reactivity of MgB2 with powdered forms of common substrate and electronic materials is reported. Reaction temperatures between 600 C and 800 C, encompassing the range commonly…
Core pinning by intragranular nanoprecipitates in polycrystalline MgCNi_3
L. D. Cooley, X. Song, J. Jiang +4
The nanostructure and magnetic properties of polycrystalline MgCNi_3 were studied by x-ray diffraction, electron microscopy, and vibrating sample magnetometry. While the bulk flux-…
Absence of a structural transition up to 40 Gpa in MgB2 and the relevance of magnesium non-stoichiometry
P. Bordet, M. Mezouar, M. Nunez-Regueiro +8
We report measurements on MgB2 up to ~40GPa. Increasing pressure yields a monotonous decrease of the lattice parameters and of the c/a ratio, but no structural transition down to p…
(13)C NMR investigation of the superconductor MgCNi_3 up to 800K
P. M. Singer, T. Imai, T. He +2
We report (13)C NMR characterization of the new superconductor MgCNi_3 (He et al., Nature (411), 54 (2001)). We found that both the uniform spin susceptibility and the spin fluctua…
Temperature dependence of the structural parameters of the non-oxide perovskite superconductor MgCNi3
Q. Huang, T. He, K. A. Regan +5
We report the structural parameters of superconducting MgCxNi3 (x=0.96, TC=7.3 K) as a function of temperature, from 2 K to 295 K, determined by neutron powder diffraction profile…
The suppression of superconductivity in MgCNi3 by Ni-site doping
M. A. Hayward, M. K. Haas, A. P. Ramirez +5
The effects of partial substitution of Cu and Co for Ni in the intermetallic perovskite superconductor MgCNi3 are reported. Calculation of the expected electronic density of states…
Thin Film Magnesium Boride Superconductor with Very High Critical Current Density and Enhanced Irreversibility Field
C. B. Eom, M. K. Lee, J. H. Choi +22
The discovery of superconductivity at 39 K in magnesium diboride offers the possibility of a new class of low-cost, high-performance superconducting materials for magnets and elect…
Strongly linked current flow in polycrystalline forms of the new superconductor MgB2
D. C. Larbalestier, M. O. Rikel, L. D. Cooley +19
The discovery of superconductivity at 39 K in MgB2[1] raises many issues. One of the central questions is whether this new superconductor resembles a high-temperature-cuprate super…