Zobrazeno 1 - 10
of 64
pro vyhledávání: '"H. R. Kerchner"'
Autor:
David K. Christen, James R Thompson, Claudia Cantoni, H. R. Kerchner, K. D. Sorge, Mariappan Parans Paranthaman
Publikováno v:
Superconductor Science and Technology. 18:970-976
We have investigated the pinning of vortices in high-Jc films of polycrystalline MgB2, by studying the dependence of current density J on electric field E using both magnetic and transport methods. Precursor films of amorphous boron, deposited on sap
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::639d3c588bc551ca0189ceeae4ee45c0
https://doi.org/10.1088/0953-2048/18/7/008
https://doi.org/10.1088/0953-2048/18/7/008
Autor:
David P. Norton, D. M. Kroeger, Mariappan Parans Paranthaman, Dominic F. Lee, Roeland Feenstra, H. R. Kerchner, Frederick Alyious List, Amit Goyal, David K. Christen, John D. Budai, Ernst Helmut Brandt
Publikováno v:
Physical Review B. 60:6878-6883
${\mathrm{YBa}}_{2}{\mathrm{Cu}}_{3}{\mathrm{O}}_{7\mathrm{\ensuremath{-}}\mathrm{\ensuremath{\delta}}}$ films grown on both ${\mathrm{SrTiO}}_{3}$ single-crystal and rolling-assisted biaxially textured (Ni) substrates (RABiTS) carry high critical cu
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::d055a1fb9f3779ce7a217627a2067777
https://doi.org/10.1103/physrevb.60.6878
https://doi.org/10.1103/physrevb.60.6878
Autor:
A. Gapud, B. W. Kang, Won Nam Kang, H. R. Kerchner, Quark Y. Chen, Wei-Kan Chu, Judy Z. Wu, David K. Christen
Publikováno v:
Journal of Superconductivity: Incorporating Novel Magnetism. 11:163-167
The mixed state Hall effect has been studied in high quality HgBa2CaCu2O6+δ thin films while the pinning strength is modified by the irraddition of columnar defects. It has been shown that the pinning strength can be significantly improved by column
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::5a1c390d68c38ebb069f00b37da9a1f1
https://doi.org/10.1023/a:1022656029119
https://doi.org/10.1023/a:1022656029119
Autor:
Eliot D. Specht, Patrick M Martin, H. R. Kerchner, E. Hatfield, Q. He, David K. Christen, Chan Park, Dominic F. Lee, Frederick Alyious List, J. E. Mathis, John D. Budai, Mariappan Parans Paranthaman, Ron Feenstra, David P. Norton, D. M. Kroeger, Amit Goyal
Publikováno v:
Applied Superconductivity. 4:403-427
Fabrication of epitaxial, high- J c , biaxially aligned YBCO thick films on rolling-assisted biaxially-textured substrates (RABiTS) is summarized. The RABiTS technique utilizes standard thermomechanical processing to obtain long lengths of flexible,
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::da299d27d3e2a73f455859d58f376b85
https://doi.org/10.1016/s0964-1807(97)00029-x
https://doi.org/10.1016/s0964-1807(97)00029-x
Publikováno v:
Physica C: Superconductivity. 250:331-339
Superconductivity in polycrystalline YBa2AlxCu(3−x)O7−δ materials was characterized by dynamic AC and quasistatic DC magnetometry. Intragranular persistent current density and low-loss intergranular critical current density were deduced using DC
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::3a8be760175ad128e144fa7f36d849cc
https://doi.org/10.1016/0921-4534(95)00300-2
https://doi.org/10.1016/0921-4534(95)00300-2
Autor:
James R. Thompson, David K. Christen, Yang Ren Sun, Mariappan Parans Paranthaman, H. R. Kerchner, J. Brynestad
Publikováno v:
Physical Review B. 50:3330-3336
Magnetic studies on polycrystalline HgCa[sub 2]CuO[sub 4+[delta]] superconductors reveal pronounced pinning by the grain surfaces at low temperatures over a wide range of magnetic fields. The response to small ac fields shows that up to 80% of the wi
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::61bd2cf7f47c788c213597abed2414ef
https://doi.org/10.1103/physrevb.50.3330
https://doi.org/10.1103/physrevb.50.3330
Autor:
Yang Ren Sun, James R Thompson, J. G. Ossandon, J.E. Tkaczyk, David K. Christen, K. W. Lay, H. R. Kerchner, Brian C. Sales
Publikováno v:
Applied Superconductivity. 1:371-380
Systematic studies of flux pinning and intragrain critical current Jc were conducted in magnetically aligned, sintered Y1Ba2Cu3O7−δ material as a function of oxygen deficiency δ in the range 0 ~ 0.2. The essential findings are: 1. (1) maximum Jc
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::a5446f136460e21b10f0074025ca57d8
https://doi.org/10.1016/0964-1807(93)90246-x
https://doi.org/10.1016/0964-1807(93)90246-x
Autor:
L. Civale, F. Holtzberg, Lia Krusin-Elbaum, R. Wheeler, Marquis A. Kirk, Yang Ren Sun, A. D. Marwick, James R. Thompson, H. R. Kerchner, Thomas K. Worthington
Publikováno v:
Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms. :1143-1149
Irradiation of high-Tc superconducting crystals with low doses (1010–1011 ions/cm2) of GeV heavy ions produces a unique microstructure consisting of discrete amorphous columns which are only a few nm in diameter but tens of μm long. It has been fo
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::527c3073223205769285678d99d67c4b
https://doi.org/10.1016/0168-583x(93)90753-s
https://doi.org/10.1016/0168-583x(93)90753-s
Autor:
H. M. Christen, Eliot D. Specht, Claudia Cantoni, Mariappan Parans Paranthaman, H. R. Kerchner, Tolga Aytug, David K. Christen, D. H. Lowndes, James R. Thompson, Srivatsan Sathyamurthy, Hong-Ying Zhai
Publikováno v:
Applied Physics Letters. 78:3669-3671
Superconducting MgB(2) films with Tc = 38.6 K were prepared using a precursor-deposition, ex-situ post-processing approach. Precursor films of boron, ~0.5 micrometer thick, were deposited onto Al(2)O(3) (102) substrates by e-beam evaporation; a post-
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::89d905e785380b31565446b2387b1393
https://doi.org/10.1063/1.1377323
https://doi.org/10.1063/1.1377323
Autor:
David K. Christen, C.E. Klabunde, James R Thompson, H. R. Kerchner, J.O. Thompson, Yang Ren Sun
Publikováno v:
Physica C: Superconductivity. 198:75-80
Experimental measurements of four-terminal (van der Pauw) transport-current resistivity and of dynamic AC magnetic response of certain superlattice films show broad resistive transitions and frequency-dependent magnetic transitions into the supercond
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::19f0f0bed256b015ae32988972fc1cf0
https://doi.org/10.1016/0921-4534(92)90268-h
https://doi.org/10.1016/0921-4534(92)90268-h