63 citations · 153 across the 13 of their papers we have counts for
13 papers
Complete Suppression of Thermomagnetic Instabilities in Nb Superconducting Films by Combined Metallic Layers and Ion Irradiation
D. Carmo, A. M. H. de Andrade, R. Giulian +3
Thermomagnetic instabilities in superconducting films can trigger flux avalanches that disrupt the critical state and impair the performance of superconducting devices. Here we inv…
Maximum limit of connectivity in rectangular superconducting films with an oblique weak link
F. Colauto, D. Carmo, A. M. H. de Andrade +3
A method for measuring the electrical connectivity between parts of a rectangular superconductor was developed for weak links making an arbitrary angle with the long side of the sa…
Magnetization texture imprints produced by flux avalanches in ferromagnet/insulator/superconductor heterostructures
Rovan F. Lopes, Milton A. Tumelero, Clodoaldo I. L. de Araujo +6
The magnetic textures generated by a perpendicularly applied magnetic field at the ferromagnetic layer of thin film heterostructures are investigated using magn…
Magnetic field-induced weak-to-strong-link transformation in patterned superconducting films
D. A. D. Chaves, M. I. Valerio-Cuadros, L. Jiang +11
Ubiquitous in most superconducting materials and a common result of nanofabrication processes, weak-links are known for their limiting effects on the transport of electric currents…
Enhancing the effective critical current density in a Nb superconducting thin film by cooling in an inhomogeneous magnetic field
D. A. D. Chaves, I. M. de Araújo, D. Carmo +7
Quantitative magneto-optical imaging of a type-II superconductor thin film cooled under zero, homogeneous, and inhomogeneous applied magnetic fields, indicates that the latter proc…
Measurement of critical current flow and connectivity in systems of joined square superconducting plates
F. Colauto, D. Carmo, A. M. H. de Andrade +4
A method to measure the electrical connectivity between square superconducting plates joined by weak link interfaces is presented. It is based on observation of lines where the flo…
Active control of thermomagnetic avalanches in superconducting Nb films with tunable anisotropy
D. Carmo, F. Colauto, A. M. H. de Andrade +4
Active triggering and manipulation of ultrafast flux dynamics in superconductors are demonstrated in films of Nb. Controlled amounts of magnetic flux were injected from a point alo…
Spin texture on top of vortex avalanches in Nb/Al_2O_3/Co thin film heterostructures
R. F. Lopes, D. Carmo, F. Colauto +5
We report on magneto-optical imaging, magnetization, Hall effect and magneto-resistance experiments in Nb/Al_2O_3/Co thin film heterostructures. The magnetic field is applied perpe…
Cascade dynamics of thermomagnetic avalanches in superconducting films with holes
J. I. Vestgarden, F. Colauto, A. M. H. de Andrade +3
The sub-microsecond dynamics of thermomagnetic avalanches in superconducting films with non-conducting holes (antidots) is considered. When such an avalanche reaches a hole, it is…
First observation of flux avalanches in a-MoSi superconducting thin films
F. Colauto, M. Motta, A. Palau +3
We have observed the occurrence of dendritic flux avalanches in an amorphous film of MoSi. These events are understood to have a thermomagnetic origin and involve the…
Classical analogy for the deflection of flux avalanches by a metallic layer
J. Brisbois, B. Vanderheyden, F. Colauto +7
Sudden avalanches of magnetic flux bursting into a superconducting sample undergo deflections of their trajectories when encountering a conductive layer deposited on top of the sup…
Enhancement of pinning properties of superconducting thin films by graded pinning landscapes
M. Motta, F. Colauto, W. A. Ortiz +7
A graded distribution of pinning centers (antidots) in superconducting MoGe thin films has been investigated by magnetization and magneto-optical imaging. The pinning landscape has…
Anomalous flux avalanche morphology in a a-MoGe superconducting film with a square antidot lattice - experiment and simulation
M. Motta, F. Colauto, W. A. Ortiz +5
We have employed magneto-optical imaging to visualize the occurrence of flux avalanches in a superconducting film of a-MoGe. The specimen was decorated with square antidots arrange…