| dc.creator |
Kunchur M. N. |
|
| dc.creator |
Cheng Wu |
|
| dc.creator |
Arcos D. H. |
|
| dc.creator |
Saracila G. |
|
| dc.creator |
Eun-Mi Choi |
|
| dc.creator |
Kim Kijoon H.P. |
|
| dc.creator |
Kang W. N. |
|
| dc.creator |
Sung-Ik Lee |
|
| dc.date |
2003 |
|
| dc.date.accessioned |
2013-06-01T10:47:38Z |
|
| dc.date.available |
2013-06-01T10:47:38Z |
|
| dc.date.issued |
2013-06-01 |
|
| dc.identifier |
http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-97332003000400013 |
|
| dc.identifier |
http://www.doaj.org/doaj?func=openurl&genre=article&issn=01039733&date=2003&volume=33&issue=4&spage=705 |
|
| dc.identifier.uri |
http://koha.mediu.edu.my:8181/jspui/handle/123456789/8303 |
|
| dc.description |
We have investigated the low-temperature (T < Tc=10) mixed-state current-voltage (IV) response of magnesium diboride films beyond the point where the superconductivity is completely destroyed and the system enters the normal state. The resistance-versus-current R(I) curves are extremely steep and featureless, with a critical current density j c, marking the onset of dissipation, that is unusually high (j c>j d/10) with respect to the depairing current density j d. At large flux densities Hc2/10 <img id="_x0000_i1026" src="../../../../img/revistas/bjp/v33n4/a13img01.gif" align=absbottom>B <img id="_x0000_i1027" src="../../../../img/revistas/bjp/v33n4/a13img01.gif" align=absbottom>Hc2, the R(I) curve has a functional shape that is largely independent of B, indicating that the rise in resistivity with increasing current occurs mainly due to pair-breaking rather than flux motion. The macroscopic destruction current I*, which drives the system normal, has a <img id="_x0000_i1028" src="../../../../img/revistas/bjp/v33n4/a13img02.gif" align=absbottom>flux-density dependence, suggesting that the vortices mainly reduce the effective cross section over which a current of effective density j ~ j d flows. |
|
| dc.publisher |
Sociedade Brasileira de Física |
|
| dc.source |
Brazilian Journal of Physics |
|
| dc.title |
Mixed-state transport characteristics of magnesium diboride films |
|