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The unusual distribution of spin-triplet supercurrents in disk-shaped Josephson junctions
Remko Fermin, Junxiang Yao, Kaveh Lahabi +1
The phenomenon of s-wave spin triplet Cooper pairs induced in ferromagnetic metals has been researched now for more than a decade, and its main aspects are well understood. Crucial…
Triplet supercurrents in lateral Josephson junctions with a half-metallic ferromagnet
Yao Junxiang, Remko Fermin, Mariona Cabero +2
In the area of superconducting spintronics, spin triplet supercurrents in half-metallic ferromagnets (HMFs) could yield dissipationless spin transport over large distances, and hig…
Mesoscopic superconducting memory based on bistable magnetic textures
Remko Fermin, Naor Scheinowitz, Jan Aarts +1
With the ever-increasing energy need to process big data, the realization of low-power computing technologies, such as superconducting logic and memories, has become a pressing iss…
Superconducting triplet rim currents in a spin-textured ferromagnetic disk
Remko Fermin, Dyon van Dinter, Michel Hubert +4
Since the discovery of the long-range superconducting proximity effect, the interaction between spin-triplet Cooper pairs and magnetic structures such as domain walls and vortices…
Spontaneous emergence of Josephson junctions in homogeneous rings of single-crystal Sr2RuO4
Yuuki Yasui, Kaveh Lahabi, Victor Fernández Becerra +7
The chiral p-wave order parameter in SrRuO would make it a special case amongst the unconventional superconductors. A consequence of this symmetry is the…
Little-Parks oscillations with half-quantum fluxoid features in Sr2RuO4 micro rings
Yuuki Yasui, Kaveh Lahabi, Muhammad Shahbaz Anwar +5
In a micro ring of a superconductor with a spin-triplet equal-spin pairing state, a fluxoid, a combined object of magnetic flux and circulating supercurrent, can penetrate as half-…
Growth of half-metallic CrO2 nanostructures for superconducting spintronic applications
A. Singh, C. Jansen, K. Lahabi +1
Superconductor-ferromagnet (S-F) hybrids based on half-metallic ferromagnets, such as CrO2, are excellent candidates for superconducting spintronic applications. This is primarily…
Colossal proximity effect in a superconducting triplet spin valve based on halfmetallic ferromagnetic CrO2
A. Singh, S. Voltan, K. Lahabi +1
Ferromagnets can sustain supercurrents through the formation of equal spin triplet Cooper pairs and the mechanism of odd-frequency pairing. Since such pairs are not broken by the e…
In search for the superconducting spin-switch: Magnetization induced resistance switching effects in LaSrMnO/YBaCuO bi- and trilayers
M. van Zalk, M. Veldhorst, A. Brinkman +2
We have studied the influence of the magnetization on the superconducting transition temperature () in bi- and trilayers consisting of the half-metallic ferromagnet La$_{0.67}…
Spin dynamics in a superconductor / ferromagnet proximity system
C. Bell, S. Milikisyants, M. Huber +1
The ferromagnetic resonance of thin sputtered Ni80Fe20 films grown on Nb is measured. By varying the temperature and thickness of the Nb the role of the superconductivity on the wh…
Vortex relaxation and coupling in superconducting heterostructures studied by STM
G. J. C. van Baarle, F. Galli, P. H. Kes +1
In a sandwich consisting of two superconducting films, one weakly pinning and one strongly pinning, the vortex positions in both films are determined by the strongly pinning materi…
Critical voltage of a mesoscopic superconductor
R. S. Keizer, M. G. Flokstra, J. Aarts +1
We study the role of the quasiparticle distribution function f on the properties of a superconducting nanowire. We employ a numerical calculation based upon the Usadel equation. Go…
Depairing currents in superconductor / ferromagnet Nb/CuNi trilayers close to T
A. Rusanov, M. Hesselberth, S. Habraken +1
In superconductor/ferromagnet (S/F) heterostructures, the exchange field of the F-layer suppresses the superconducting order parameter in the S-layer via the proximity eff…
STM Imaging of Flux Line Arrangements in the Peak Effect Regime
A. M. Troyanovski, M. van Hecke, N. Saha +2
We present the results of a study of vortex arrangements in the peak-effect regime of 2H-NbSe_2 by scanning tunneling microscopy. By slowly increasing the temperature in a constant…
Hall-conductivity sign change and fluctuations in amorphous NbGe films
Nobuhito Kokubo, Jan Aarts, Peter H. Kes
The sign change in the Hall conductivity has been studied in thin amorphous NbGe0.3) films. By changing the film thickness it is shown that the field at which…
Coupling of two superconductors through a ferromagnet : evidence for a pi-junction
V. V. Ryazanov, V. A. Oboznov, A. Yu. Rusanov +3
We report measurements of the temperature dependence of the critical current in Josephson junctions consisting of conventional superconducting banks of Nb and a weakly ferromagneti…