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Pis'ma v Zhurnal Èksperimental'noi i Teoreticheskoi Fiziki, 2004, Volume 80, Issue 10, Pages 758–762
(Mi jetpl2172)
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This article is cited in 16 scientific papers (total in 16 papers)
CONDENSED MATTER
Properties of Josephson junctions in the inhomogeneous magnetic field of a system of ferromagnetic particles
S. N. Vdovicheva, B. A. Gribkova, S. A. Guseva, E. V. Il'ichevb, A. Yu. Klimova, Yu. N. Nozdrina, G. L. Pakhomova, V. V. Rogova, R. Stolzb, A. A. Fraermana a Institute for Physics of Microstructures, Russian Academy of Sciences, Nizhnii Novgorod
b Institute for Physical High Technology, 07702 Jena, Germany
Abstract:
The effect of a system of ferromagnetic particles on the field-dependent critical current of a Josephson junction is experimentally studied for junctions of different geometries. For edge junctions, the effect of commensurability between the periodic magnetic field of the particles and the Josephson vortex lattice is observed. The effect manifests itself in additional maxima of the field-dependent critical current. For overlap junctions, giant (greater than sixfold) variations of the maximum critical current are observed depending on the magnetic state of the particles. The changes in the “Fraunhofer” pattern of the overlaped Josephson junctions are attributed to the formation of Abrikosov vortices due to the effect of uniformly magnetized particles. The effects revealed in the experiments can be used to analyze the inhomogeneous magnetic field of a system of submicron particles and to control the transport properties of Josephson junctions.
Received: 21.09.2004 Revised: 21.10.2004
Citation:
S. N. Vdovichev, B. A. Gribkov, S. A. Gusev, E. V. Il'ichev, A. Yu. Klimov, Yu. N. Nozdrin, G. L. Pakhomov, V. V. Rogov, R. Stolz, A. A. Fraerman, “Properties of Josephson junctions in the inhomogeneous magnetic field of a system of ferromagnetic particles”, Pis'ma v Zh. Èksper. Teoret. Fiz., 80:10 (2004), 758–762; JETP Letters, 80:10 (2004), 651–654
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https://www.mathnet.ru/eng/jetpl2172 https://www.mathnet.ru/eng/jetpl/v80/i10/p758
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