Ferromagnet/superconductor hybridization for magnonic applications

IA Golovchanskiy, NN Abramov… - Advanced functional …, 2018 - Wiley Online Library
In this work, a new hybridization of superconducting and ferromagnetic orders is
demonstrated, promising for magnonics. By measuring the ferromagnetic and spin wave …

Buzdin, Shapiro, and chimera steps in Josephson junctions. II. Bifurcation, switching, and hysteresis

M Nashaat, E Kovalenko, YM Shukrinov - Physical Review B, 2024 - APS
The dynamics of magnetization and current-voltage characteristics of the superconductor-
ferromagnet-superconductor φ 0 Josephson junction in the presence of external …

Buzdin, Shapiro, and chimera steps in Josephson junctions

YM Shukrinov, E Kovalenko, J Tekić, K Kulikov… - Physical Review B, 2024 - APS
The unique resonance and locking phenomena in the superconductor-ferromagnet-
superconductor φ 0 Josephson junction under external electromagnetic radiation are …

Collisionless dynamics of the superconducting gap excited by a spin-splitting field

V Plastovets, AS Mel'nikov, AI Buzdin - Physical Review B, 2023 - APS
We study the coherent dynamic interaction of a time-dependent spin-splitting field with the
homogeneous superconducting order parameter Δ (t) mediated by spin-orbit coupling using …

Resonance phenomena in a nanomagnet coupled to a Josephson junction under external periodic drive

KV Kulikov, DV Anghel, M Nashaat, M Dolineanu… - Physical Review B, 2024 - APS
We investigate resonance phenomena in a system consisting of a nanomagnet coupled to a
Josephson junction under external periodic drive. The coupling in the system leads to the …

Non-equilibrium charge and spin transport in superconducting–ferromagnetic–superconducting point contacts

C Holmqvist, W Belzig… - … Transactions of the …, 2018 - royalsocietypublishing.org
The conventional Josephson effect may be modified by introducing spin-active scattering in
the interface layer of the junction. Here, we discuss a Josephson junction consisting of two s …

Interplay of magnetization dynamics with a microwave waveguide at cryogenic temperatures

IA Golovchanskiy, NN Abramov, M Pfirrmann… - Physical Review …, 2019 - APS
In this work, magnetization dynamics is studied at low temperatures in a hybrid system that
consists of a thin epitaxial magnetic film coupled with a superconducting planar microwave …

[HTML][HTML] On the Choi–Lam analogue of Hilbert's 1888 theorem for symmetric forms

C Goel, S Kuhlmann, B Reznick - Linear Algebra and its Applications, 2016 - Elsevier
A famous theorem of Hilbert from 1888 states that for given n and d, every positive
semidefinite (psd) real form of degree 2d in n variables is a sum of squares (sos) of real …

Spin-polarized Shapiro steps and spin-precession-assisted multiple Andreev reflection

C Holmqvist, M Fogelström, W Belzig - Physical Review B, 2014 - APS
We investigate the charge and spin transport of a voltage-biased superconducting point
contact coupled to a nanomagnet. The magnetization of the nanomagnet is assumed to …

Probing dynamics of micro-magnets with multi-mode superconducting resonator

IA Golovchanskiy, NN Abramov, VS Stolyarov… - Journal of Applied …, 2018 - pubs.aip.org
In this work, we propose and explore a sensitive technique for investigation of ferromagnetic
resonance and corresponding magnetic properties of individual micro-scaled and/or weak …