Evidence for a<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:mi>π</mml:mi></mml:math>junction in<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:mrow><mml:msub><mml:mrow><mml:mi>Nb</mml:mi><mml:mo>/</mml:mo><mml:mi>Ni</mml:mi></mml:mrow><mml:mrow><mml:mn>0.96</mml:mn></mml:mrow></mml:msub><mml:msub><mml:mi mathvariant="normal">V</mml:mi><mml:mrow><mml:mn>0.04</mml:mn></mml:mrow></mml:msub><mml:mo>/</mml:mo><mml:mi>Nb</mml:mi></mml:mrow></mml:math>trilayers revealed by superfluid

Hinton, M.J.; Steers, Stanley; Peters, Bryan; Yang, Fengyuan; Lemberger, Thomas R.

doi:10.1103/physrevb.94.014518

Cited by 10 publications

(5 citation statements)

References 26 publications

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“…Remarkably, the emergence of the in-plane FFLO phase should reveal itself through the vanishing Meissner response of the sample on the external parallel magnetic field. Experimentally, such feature can be detected, e.g., in the surface inductance measurements on the basis of the two-coil technique [25,26] which has been recently applied for the study of the screening properties of the S/F bilayers [27,28]. The similar instabilities of the uniform state has been predicted also for a ferromagnetic cylinder covered by the superconducting shell [29][30][31] as well as for the planar superconductor / normal metal (N) structures under non-equilibrium quasiparticle distribution [32,33].…”

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confidence: 99%

Temperature Controlled Fulde-Ferrell-Larkin-Ovchinnikov Instability in Superconductor-Ferromagnet Hybrids

et al. 2018

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We show that a wide class of layered superconductor-ferromagnet (S/F) hybrids demonstrates the emergence of the Fulde-Ferrell-Larkin-Ovchinnikov (FFLO) phase well below the superconducting transition temperature. By decreasing the temperature, one can switch the system from uniform to the FFLO state which is accompanied by the damping of the diamagnetic Meissner response down to zero and also by the sign change in the curvature of the current-velocity dependence. Our estimates show that an additional layer of the normal metal (N) covering the ferromagnet substantially softens the conditions required for the predicted FFLO instability, and for existing S/F/N systems, the temperature of the transition into the FFLO phase can reach several kelvins.

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confidence: 99%

Temperature Controlled Fulde-Ferrell-Larkin-Ovchinnikov Instability in Superconductor-Ferromagnet Hybrids

et al. 2018

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“…3) are accompanied by jumps in Λ/Λ T due to qualitative changes in the radial structure and symmetry of the pair wave-functions and the singlet/triplet correlations distributions in the S/F structure 71 . Such abrupt changes of screening proper-ties of S/F cylinder due to orbital modes switchings look similar to the 0 − π transition in S/F/S trilayer [72][73][74] . Negative values of Λ correspond to the total paramagnetic response of the hybrid structure.…”

Section: A Effective Magnetic Field Penetration Depthmentioning

confidence: 62%

Long-range triplet proximity effect in multiply connected ferromagnet-superconductor hybrids

2019

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Applying the linearized Usadel equations, we consider the nucleation of superconductivity in multiply connected mesoscopic superconductor/ferromagnet (S/F) hybrids such as a thin superconducting ring on a ferromagnet with a uniform in-plane magnetization M and a spin-active S/F interface. We demonstrate that the exchange field in F provokes a switching between superconducting states with different vorticities which may increase the critical temperature ( Tc ) of the superconductor in a magnetic field. We study the interplay between oscillations in Tc due to the Little-Parks effect and oscillations in Tc induced by the exchange field. Furthermore, we analyse the influence of long-range spin-triplet correlations on the switching between different vorticities.

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“…In principle, the discrepancy between distributions of the gap order parameter in these states results in the different response to the applied magnetic field. This was revealed recently, for instance, by superfluiddensity measurements 16 .…”

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confidence: 54%

Magnetic field-controlled −π transitions and their experimental signatures in superconductor-ferromagnet-superconductor junctions

Vargunin

Силаев

2020

Applied Physics Letters

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Superconductor-ferromagnet-superconductor Josephson junctions are known to exist in the 0 and π states with the transitions between them controlled by the temperature and ferromagnetic interlayer thickness. We demonstrate that these transitions can be controlled also by the external magnetic field directed perpendicular to the layers. By varying the ratio of diffusion coefficients in superconducting and ferromagnetic layers, these field-controlled transitions can be made detectable for arbitrary large value of the exchange energy in the ferromagnet. We also show that the 0-π transitions in the perpendicular field can be observed as the specific features of the flux-flow conductivity dependencies on the ferromagnetic thickness in accordance with recent experimental results.

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Evidence for aπjunction inNb/Ni0.96V0.04/Nbtrilayers revealed by superfluid

Cited by 10 publications

References 26 publications

Temperature Controlled Fulde-Ferrell-Larkin-Ovchinnikov Instability in Superconductor-Ferromagnet Hybrids

Temperature Controlled Fulde-Ferrell-Larkin-Ovchinnikov Instability in Superconductor-Ferromagnet Hybrids

Long-range triplet proximity effect in multiply connected ferromagnet-superconductor hybrids

Magnetic field-controlled −π transitions and their experimental signatures in superconductor-ferromagnet-superconductor junctions

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