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This work is devoted to experimental study of influence of superconductivity (S) on ferromagnetism (FM) (inverse proximity effects) with the help of Polarized Neutron Reflectivity. Combining meausurements of specular and diffuse intensities…

Superconductivity · Physics 2008-01-28 Yu. N. Khaidukov , Yu. V. Nikitenko , V. L. Aksenov

A resonant enhancement of the neutron standing waves is proposed to use in order to increase the magnetic neutron scattering from a "superconductor/ferromagnet"(S/F) bilayer. The model calculations show that usage of this effect allows to…

Superconductivity · Physics 2015-05-18 Yu. N. Khaydukov , Yu. V. Nikitenko , L. Bottyan , A. Ruehm , V. L. Aksenov

Polarized neutron reflectometry is used to study the magnetic proximity effect in a superconductor/ferromagnet (SC/FM) system of composition Cu(32nm)/V(40nm)/Fe(1nm)/MgO. In contrast to previous studies, here a single SC/FM bilayer, is…

We review the present status of the experimental and theoretical research on the proximity effect in heterostructures composed of superconducting (S) and ferromagnetic (F) thin films. First, we discuss traditional effects originating from…

Superconductivity · Physics 2007-05-23 K. B. Efetov , I. A. Garifullin , A. F. Volkov , K. Westerholt

A strong mutual influence of superconductors (S) and ferromagnetic (F) conductors in hybrid F/S (Ni/Al) nanostructures is observed. The magnitude of a proximity-induced conductance on the F-side is more than two orders larger than that…

Superconductivity · Physics 2009-10-31 V. T. Petrashov , I. A. Sosnin , I. Cox , A. Parsons , C. Troadec

Here we report on a feasibility study aiming to explore the potential of Polarized Neutron Reflectometry (PNR) for detecting the inverse proximity effect in a single superconducting/ferromagnetic bilayer. Experiments, conducted on the…

Strongly Correlated Electrons · Physics 2013-10-22 Yu. N. Khaydukov , B. Nagy , J. -H. Kim , T. Keller , A. Rühm , Yu. V. Nikitenko , K. N. Zhernenkov , J. Stahn , L. Kiss , A. Csik , L. Bottyán , V. L. Aksenov

The proximity effect in mesoscopic ferromagnet/superconductor ($FS$) Ni/Al structures of various geometries was studied experimentally on both $F$- and $S$-sides of the structures. Samples with a wide range of interface transparency were…

Superconductivity · Physics 2007-05-23 V. T. Petrashov , I. A. Sosnin , I. Cox , A. Parsons , C. Troadec

The inverse proximity effect, i.e. the induction of a magnetic moment in the superconductor in superconductor-ferromagnet (S/F) junctions is studied theoretically. We present a microscopic approach which combines a model Hamiltonian with…

Superconductivity · Physics 2009-11-11 F. S. Bergeret , A. Levy Yeyati , A. Martin-Rodero

We study a magnetic proximity effect at superconductor (S) - ferromagnet (F) interface. It is shown that due to an exchange of electrons between the F and S metals ferromagnetic correlations extend into the superconductor, being dependent…

Superconductivity · Physics 2009-11-07 V. N. Krivoruchko , E. A. Koshina

We have used spin-polarized neutron reflectometry to investigate the magnetization profile of superlattices composed of ferromagnetic Gd and superconducting Nb layers. We have observed a partial suppression of ferromagnetic (F) order of Gd…

We study the proximity effects near the interface between a d-wave superconductor (S) and a ferromagnet (F) or an antiferromagnet (AF). The S-side (F and AF-side) is described by the attractive (repulsive) Hubbard model, and the Bogoliubov…

Strongly Correlated Electrons · Physics 2009-10-31 Kazuhiro Kuboki

We observe large amplitude changes in the resistance of ferromagnetic (F) wires at the onset of superconductivity of adjacent superconductors (S). New sharp peaks of large amplitude are found in the magnetoresistance of the F-wires. We…

Superconductivity · Physics 2009-10-31 V. T. Petrashov , I. A. Sosnin , C. Troadec , I. Cox , A. Parsons

$\mathrm{YBa_2Cu_3O_7/La_{2/3}Ca_{1/3}MnO_3}$ superconducting/ferromagnetic (SC/FM) multilayers have been studied by neutron reflectometry. Evidence for a characteristic difference between the structural and magnetic depth profiles is…

We report the results of a study of superconducting proximity effects in clean Ferromagnet/Ferromagnet/Superconductor (${\rm F_1F_2S}$) heterostructures, where the pairing state in S is a conventional singlet s-wave. We numerically find the…

Superconductivity · Physics 2012-08-09 Chien-Te Wu , Oriol T. Valls , Klaus Halterman

We study two different superconductor-ferromagnet (S/F) structures. We consider first a Josephson junction which consists of two S/F bilayers separated by an insulating layer. We show that for an antiparallel alignment of the magnetization…

Superconductivity · Physics 2009-11-13 F. S. Bergeret , A. F. Volkov , K. B. Efetov

Considerable evidence for proximity-induced triplet superconductivity on the ferromagnetic side of a superconductor-ferromagnet (S-F) interface now exists; however, the corresponding effect on the superconductor side has hardly been…

Superconductivity · Physics 2015-09-02 Yoav Kalcheim , Oded Millo , Angelo Di Bernardo , Avardeep Pal , Jason W. A. Robinson

Ferromagnetic proximity effect is studied in InAs nanowire (NW) based quantum dots (QD) strongly coupled to a ferromagnetic (F) and a superconducting (S) lead. The influence of the F lead is detected through the splitting of the spin-1/2…

Mesoscale and Nanoscale Physics · Physics 2010-11-03 L. Hofstetter , S. Csonka , A. Geresdi , M. Aagesen , J. Nygard , C. Schonenberger

We have measured the electrical transport of submicron ferromagnets (Ni) in contact with a mesoscopic superconductor (Al) for a range of interface resistances. In the geometry measured, the interface and the ferromagnet are measured…

Mesoscale and Nanoscale Physics · Physics 2009-10-31 J. Aumentado , V. Chandrasekhar

We consider the proximity effects in hybrid superconductor (S) - ferromagnet (F) structures drawing attention to the induced ferromagnetism of the S metal. The analysis is based on a quasiclassical theory of proximity effect for metals in…

Superconductivity · Physics 2007-05-23 V. N. Krivoruchko , V. N. Varyukhin

We present an extensive theoretical investigation of the proximity effects that occur in Ferromagnet/Superconductor ($F/S$) systems. We use a numerical method to solve self consistently the Bogoliubov-de Gennes equations in the continuum.…

Superconductivity · Physics 2009-11-07 Klaus Halterman , Oriol T. Valls
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