caa a22 4500 445381884 CHVBK 20180317143019.0 cr unu---uuuuu 170323e20110101xx s 000 0 eng 10.1007/s10948-010-1039-7 doi (NATIONALLICENCE)springer-10.1007/s10948-010-1039-7 Retardation of the Magnetic Relaxation in High-Temperature Superconductors Near a Ferromagnet [Elektronische Daten] [B. Smolyak, G. Ermakov, M. Zakharov] The creep of a magnetic flux trapped in a bulk high-temperature superconductor has been studied. It has been found that the magnetic relaxation is retarded when the superconductor is placed near a ferromagnet. The value of the retardation effect depends on the sequence of magnetization and the approach of the superconductor to a ferromagnet. The magnetic relaxation is fully suppressed when a superconducting sample first is magnetized and then is brought close to a ferromagnet. An interpretation of this effect has been discussed. Being magnetized, a ferromagnet produces its own magnetic field. While penetrating into a disk sample through its planes, the ferromagnet field induces screening currents, which circulate oppositely to the current that arises upon trapping of the magnetic flux. As a result, the stability of the magnetic structure is sharply improved since opposite driving forces can act on different sections of the vortices. Springer Science+Business Media, LLC, 2010 High- T c superconductors nationallicence Trapped flux nationallicence Magnetic relaxation nationallicence Smolyak B. Institute of Thermal Physics, Ural Division RAS, 106 Amundsen St., 620016, Ekaterinburg, Russia aut Ermakov G. Institute of Thermal Physics, Ural Division RAS, 106 Amundsen St., 620016, Ekaterinburg, Russia aut Zakharov M. Institute of Thermal Physics, Ural Division RAS, 106 Amundsen St., 620016, Ekaterinburg, Russia aut Journal of Superconductivity and Novel Magnetism Springer US; http://www.springer-ny.com 24/1-2(2011-01-01), 325-329 1557-1939 24:1-2<325 2011 24 10948 https://doi.org/10.1007/s10948-010-1039-7 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s10948-010-1039-7 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Smolyak B. Institute of Thermal Physics, Ural Division RAS, 106 Amundsen St., 620016, Ekaterinburg, Russia aut NATIONALLICENCE 700 1- Ermakov G. Institute of Thermal Physics, Ural Division RAS, 106 Amundsen St., 620016, Ekaterinburg, Russia aut NATIONALLICENCE 700 1- Zakharov M. Institute of Thermal Physics, Ural Division RAS, 106 Amundsen St., 620016, Ekaterinburg, Russia aut NATIONALLICENCE 773 0- Journal of Superconductivity and Novel Magnetism Springer US; http://www.springer-ny.com 24/1-2(2011-01-01), 325-329 1557-1939 24:1-2<325 2011 24 10948 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer