Zobrazeno 1 - 10
of 19
pro vyhledávání: '"R. J. Olsson"'
Publikováno v:
Physica C: Superconductivity. :14-17
Columnar defects are shown to produce anisotropic pinning in the vortex liquid state of YBCO. We interpret the disappearance of anisotropic pinning as signaling the loss of longitudinal correlation of vortices as thermal fluctuations dominate their l
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::dbcadef97f3427e707d10ef13ee526b9
https://doi.org/10.1016/j.physc.2005.01.015
https://doi.org/10.1016/j.physc.2005.01.015
Autor:
Kazuo Kadowaki, R. J. Olsson, Ulrich Welp, Vitalii Vlasko-Vlasov, W. K. Kwok, G. W. Crabtree, Goran Karapetrov
Publikováno v:
Physica C: Superconductivity. 382:137-141
Columnar defects induced by high-energy heavy ion irradiation constitute one of the most effective vortex pinning sites in high temperature superconductors. We demonstrate a novel method of effectively patterning vortex pinning sites in single crysta
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::0d9499a58e4e44b2140830891f291685
https://doi.org/10.1016/s0921-4534(02)01213-3
https://doi.org/10.1016/s0921-4534(02)01213-3
Autor:
David J. Hofman, Lisa Paulius, William Moulton, Goran Karapetrov, W. K. Kwok, R. J. Olsson, G. W. Crabtree
Publikováno v:
Physica C: Superconductivity. :953-956
The upper and lower critical points are investigated in untwinned YBa 2 Cu 3 O 7−δ single crystals with dilute columnar defects. Dilute columnar defects raise the upper critical point, indicating that the transition near the upper critical point i
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::967f17dff64cc0cd420bc93a05a3fb35
https://doi.org/10.1016/s0921-4534(00)00750-4
https://doi.org/10.1016/s0921-4534(00)00750-4
Autor:
R. J. Olsson, W. K. Kwok, A. M. Petrean, Goran Karapetrov, G. W. Crabtree, Lisa Paulius, William Moulton, V. Tobos
Publikováno v:
Physica C: Superconductivity. 332:71-79
The effect of line disorder induced by heavy ion irradiation and of point disorder induced by proton and electron irradiation on the upper and lower critical points in the vortex phase diagram of YBCO is presented. The authors find that dilute line d
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::6516ce9eb1b32200a2bc88c9c9759e40
https://doi.org/10.1016/s0921-4534(99)00647-4
https://doi.org/10.1016/s0921-4534(99)00647-4
Autor:
W. K. Kwok, Clement Burns, J. A. Fendrich, Lisa Paulius, A. M. Petrean, G. W. Crabtree, V. Tobos, R. J. Olsson, S. Ferguson
Publikováno v:
Physical Review B. 61:R11910-R11913
We demonstrate the gradual evolution of the first-order vortex melting transition into a continuous transition with the systematic addition of point disorder induced by proton irradiation. The evolution occurs via the decrease of the upper critical p
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::7822edb26b3685512a0a3f25b64da530
https://doi.org/10.1103/physrevb.61.r11910
https://doi.org/10.1103/physrevb.61.r11910
Autor:
R. J. Olsson, Goran Karapetrov, L. M. Paulius, G. W. Crabtree, David Jonathan Hofman, William Moulton, W. K. Kwok
Publikováno v:
Physical Review Letters. 84:3706-3709
The critical points in untwinned YBa(2)Cu(3)O(7-delta) crystals with dilute columnar defects are investigated. We find a convergence of a first order vortex melting line with an irreversibility line associated with the onset of the Bose glass critica
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::645eedb2e67a3e7ec69c9e3c23848880
https://doi.org/10.1103/physrevlett.84.3706
https://doi.org/10.1103/physrevlett.84.3706
Autor:
R. A. Fisher, Ulrich Welp, G. W. Crabtree, Andreas Schilling, W. K. Kwok, Hugo Keller, C. Rossel, Norman E. Phillips, R. J. Olsson, M. Willemin
Publikováno v:
Physical Review B. 61:3592-3603
We measured the magnetic torque \ensuremath{\tau} experienced by an untwinned ${\mathrm{YBa}}_{2}{\mathrm{Cu}}_{3}{\mathrm{O}}_{7\ensuremath{-}\ensuremath{\delta}}$ single crystal in external magnetic fields up to ${\ensuremath{\mu}}_{0}H=7\mathrm{T}
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::62e41cd8ab822af558fb7a8c1f210b6d
https://doi.org/10.1103/physrevb.61.3592
https://doi.org/10.1103/physrevb.61.3592
Autor:
L. M. Paulius, W. K. Kwok, A. M. Petrean, G. W. Crabtree, V. Tobos, William Moulton, R. J. Olsson, Goran Karapetrov
Publikováno v:
Journal of Superconductivity: Incorporating Novel Magnetism. 13:741-748
The disordered vortex phases induced by line and point pinning in YBa2Cu3O7−δ are explored. At high defect densities, only a single disordered solid separated from the liquid phase by a melting line is observed. At low defect densities the topolog
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::e14ccc43fac13d60f387b59720c2cbb0
https://doi.org/10.1023/a:1007862114629
https://doi.org/10.1023/a:1007862114629
Autor:
Hugo Safar, L. M. Paulius, A. M. Petrean, W. K. Kwok, R. J. Olsson, Daniel Lopez, G. W. Crabtree
Publikováno v:
Materials Science Forum. :314-321
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::9fc4a6b6a60428f25ddc9d250766d5ff
https://doi.org/10.4028/www.scientific.net/msf.315-317.314
https://doi.org/10.4028/www.scientific.net/msf.315-317.314
Autor:
Daniel Lopez, W. K. Kwok, A. M. Petrean, G. W. Crabtree, Hugo Safar, R. J. Olsson, Lisa Paulius
Publikováno v:
Physical Review Letters. 82:1277-1280
We report transport measurements in the mixed state of YBa{sub 2}Cu {sub 3}O{sub 7{minus}{delta}} single crystals using a contact geometry which enables control of the gradient of the Lorentz force acting on the vortices. The spatial dependence of th
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::d4fe18f8738f440f2cc0064950f27a51
https://doi.org/10.1103/physrevlett.82.1277
https://doi.org/10.1103/physrevlett.82.1277