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| Author | Luzuriaga, J.; Badía-Majós, A.; Nieva, G.; Giordano, J.L.; Lopez, C.; Serquis, A.; Serrano, G. | ||||
| Title | Magnetic relaxation induced by transverse flux shaking in MgB2 superconductors | Type | Journal Article | ||
| Year | 2009 | Publication | Superconductor Science and Technology | Abbreviated Journal | Supercond. Sci. Technol. |
| Volume | 22 | Issue | Pages | 15021 | |
| Keywords | MgB2 | ||||
| Abstract | We report on measurements and numerical simulations of the behavior of MgB2 superconductors when magnetic field components are applied along mutually perpendicular directions. By closely matching the geometry in simulations and measurements, full quantitative agreement is found. The critical state theory and a single phenomenological law, i.e. the field dependence of the critical current density Jc(B), are sufficient for a full quantitative description of the measurements. These were performed in thick strips of carbon nanotube doped MgB2 samples. Magnetization was measured in two orthogonal directions using a SQUID magnetometer. Magnetic relaxation effects induced by the application of an oscillatory perpendicular field were observed and simulated numerically. The measurements confirm the numerical predictions, that two relaxation regimes appear, depending on the amplitude of the applied magnetic field. The overall agreement constitutes a convincing validation of the critical state model and the numerical procedures used. | ||||
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| Notes | Approved | no | |||
| Call Number | BT @ gnieva @ | Serial | 421 | ||
| Permanent link to this record | |||||
| Author | Luzuriaga, J.; Badía-Majós, A.; Nieva, G.; Giordano, J.L.; Lopez, C.; Serquis, A.; Serrano, G. | ||||
| Title | Experimental and numerical study of transverse flux shaking in MgB2 superconductors | Type | Conference Article | ||
| Year | 2009 | Publication | Journal of Physics: Conference Series | Abbreviated Journal | J. Phys.: Conf. Ser. |
| Volume | 167 | Issue | Pages | 012009 | |
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| Abstract | Magnetization measurements in the mixed state of thick strips of carbon nanotube doped MgB 2 in crossed fields configurations are reported, together with numerical simulations performed with a geometry equivalent to the sample shape. The samples were subjected to magnetic field components along mutually perpendicular directions, an oscillatory field in one direction and a remanent magnetization in the perpendicular direction. The magnetic response along the oscillatory field and the magnetic relaxation perpendicular to it are observed and simulated using the critical state theory. A remarkable quantitative agreement between the experiment and the theory was obtained. |
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| Corporate Author | Thesis | ||||
| Publisher | Place of Publication | Editor | |||
| Language | Summary Language | Original Title | |||
| Series Editor | Series Title | Abbreviated Series Title | |||
| Series Volume | Series Issue |
Edition | |||
| ISSN | ISBN | Medium | |||
| Area | Expedition | Conference | XIX Latin American Symposium on Solid State Physics (SLAFES XIX) | ||
| Notes | Approved | no | |||
| Call Number | BT @ pedrazp @ | Serial | 737 | ||
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