Zobrazeno 1 - 10
of 103
pro vyhledávání: '"Finnemore, D. K."'
Autor:
Wilke, R. H. T., Bud'ko, S. L., Canfield, P. C., Finnemore, D. K., Suplinskas, Raymond J., Farmer, J., Hannahs, S. T.
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 temperature. The initial fluence fully suppressed supercon
Externí odkaz:
http://arxiv.org/abs/cond-mat/0507275
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 elevated temperature of 1200 $^o$C. This reaction p
Externí odkaz:
http://arxiv.org/abs/cond-mat/0507151
Autor:
Wilke, R. H. T., Bud'ko, S. L., Canfield, P. C., Kramer, M. J., Wu, Y. Q., Finnemore, D. K., Suplinskas, R. J., Marzik, J. V., Hannahs, S. T.
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 encountered if these dopants are used to enhance the supercon
Externí odkaz:
http://arxiv.org/abs/cond-mat/0411531
Autor:
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 boron filaments are prepared by CVD techniques, an
Externí odkaz:
http://arxiv.org/abs/cond-mat/0312235
Autor:
Kramer, M. J., Bud'ko, S. L., Canfield, P. C., Wilke, R. H. T., Finnemore, D. K., Suplinskas, R. J.
Superconducting magnesium diboride has been prepared with intra-granular TiB precipitates that have appropriate size and spacing for the pinning of superconducting vortices. The TiB particles have a size ranging from 1 nm to 20 nm and a spacing about
Externí odkaz:
http://arxiv.org/abs/cond-mat/0302443
Autor:
Anderson, Jr., N. E., Straszheim, W. E., Bud'ko, S. L., Canfield, P. C., Finnemore, D. K., Suplinskas, R. J.
A series of doping experiments are reported for MgB2 conductors that have been synthesized using doped boron fibers prepared by chemical vapor deposition(CVD) methods. Undoped MgB2 samples prepared from CVD prepared fibers consistently give critical
Externí odkaz:
http://arxiv.org/abs/cond-mat/0302245
Autor:
Finnemore, D. K., Straszheim, W. E., Bud'ko, S. L., Canfield, P. C., Anderson Jr, N. E., Suplinskas, R. J.
Processing methods are described for the development of magnesium diboride wire using the chemical vapor deposition (CVD) to produce long lengths of suitably doped starting boron fiber. It is found that titanium can be co-deposited with the boron to
Externí odkaz:
http://arxiv.org/abs/cond-mat/0302242
The basic physical properties of MgB$_2$ have been well established over the past two years of intensive research. At this point there is a general consensus about the values for the isotope shift, critical fields, most of the salient length scales,
Externí odkaz:
http://arxiv.org/abs/cond-mat/0212445
Autor:
Huh, Yung M., Finnemore, D. K.
Vortex fluctuations in the $La_{2-x}Sr_{x}CuO_{4+\delta}$ system have been studied as a function of magnetic field, temperature and carrier concentration in order to determine the dimensionality of the fluctuations. For a $x=0.10$ sample, there is a
Externí odkaz:
http://arxiv.org/abs/cond-mat/0110626
Autor:
Huh, Yung M., Finnemore, D. K.
Thermodynamic critical field curves have been measured for $La_{2-x}Sr_{x}CuO_{4+\delta}$ over the full range of carrier concentrations where superconductivity occurs in order to determine changes in the normal state density of states with carrier co
Externí odkaz:
http://arxiv.org/abs/cond-mat/0110638