SQUID magnetometer based on Grooved Dayem nanobridges and a flux transformer

Trabaldo, Edoardo; Pfeiffer, Christoph; Andersson, Eric; Arpaia, Riccardo; Kalaboukhov, Alexei; Winkler, Dietmar W.; Lombardi, Floriana

doi:10.1109/isec46533.2019.8990909

Cited by 3 publications

(6 citation statements)

References 15 publications

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“…This observation suggests that low frequency AC‐excitations may represent an effective way to increase the resistance of the transport bridge in a controlled fashion. [ 14,19 ]…”

Section: Resultsmentioning

confidence: 99%

“…In addition, the model permits us to explore the influence of different parameters such as initial oxygen concentration, oxygen disorder, and activation energy, which would require a colossal effort to address experimentally. These findings might shed light on the recent investigation of DC and AC electromigration in YBCO [ 14,19 ] and could be extended to explore the memristive properties of this material [ 25 ] or the electrical doping of Bi 2 Sr 2 CaCu 2 O 8−δ . [ 26 ] The close correlation between experiments and theory may encourage further research to explore the predictive power of the modeling to analyze the retention time and endurance of memristive devices based on oxygen motion and the effect of degassing caused by oxygen out‐diffusion.…”

Section: Discussionmentioning

confidence: 96%

“…This observation suggests that low frequency AC-excitations may represent an effective way to increase the resistance of the transport bridge in a controlled fashion. [14,19] Let us now analyze the induced inhomogeneous oxygen distribution as revealed by in situ optical microscopy. A selected set of images is presented in Figure 4e corresponding to different stages during the electromigration cycle process.…”

Section: Ac Electric Stressmentioning

confidence: 99%

“…[ 13 ] This technique has been implemented to scan the entire temperature‐hole concentration phase diagram in a single sample. [ 14 ] In this case, the agglomeration of oxygen vacancies manifests itself as a zone of higher reflectivity thus permitting to track the temporal evolution of the affected area by optical microscopy.…”

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Electrically‐Driven Oxygen Vacancy Aggregation and Displacement in YBa₂Cu₃O_7−δ Films

Collienne

Marinković

Fernández‐Rodríguez

et al. 2022

Adv Elect Materials

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this material but seems to be generally observed in a vast majority of complex oxide compounds. From a technological standpoint, it is imperative to understand and master oxygen diffusion through thermal processing, in order to achieve high-end coated-conductors and reliable bipolar non-volatile resistive switchers. Consequently, an understanding of the chemical diffusion in YBCO may bear profound implications to a large diversity of oxide materials and their derived applications.The variation of oxygen concentration in YBCO mostly occurs in the O(1) sites of the CuO chains along the crystallographic b-axis. In the superconducting orthorhombic phase (δ ≈ 0), if the O(1) atom migrates to a neighboring vacant O(5) site, it will find a channel along the b-axis direction with essentially no diffusion barrier. [2] It is expected that the associated activation energy E a will depend strongly on the amount of oxygen atoms per unit cell, with E a lowering as the number of available sites (i.e., δ) increases. This has been indeed experimentally confirmed in YBCO crystals for which it was reported E a = 1.3 eV for δ = 0 and E a = 0.5 eV for δ = 0.38. [3] In addition, isotopic 18 O tracer diffusion measurements by Rothman et al. [4] indicated a value of E a = 0.97 eV in the ab-plane of bulk YBCO pellets. Similar value was reported for YBCO single crystals with stoichiometry δ = 0.5 by Veal et al. [5] through thermal annealing process. Soon after, Choi et al. [6] calculated the oxygen tracer diffusion coefficients using the cluster variation method in conjunction with the path probability method for a perfect lattice and showed that activation energies are significantly dependent on the oxygen density and the degree of long-range order, with E a = 0.8 eV in the tetragonal phase and E a = 1.2 eV in the orthorhombic phase. The fact that the activation energies for the oxygen diffusion decrease with decreasing oxygen content was also confirmed in laser ablated thin films by Krauns and Krebs. [7] In ref.[8], a migration energy as low as 0.3 eV has been calculated for oxygen ions in the ab-plane using a shell model for the orthorhombic phase. A more in-depth investigation of oxygen tracer diffusion in untwined single-crystalline YBCO showed that the diffusion along the b direction can be at least 100 times faster than diffusion along the a direction. [9] In all cases, diffusion along c-axis was shown to be substantially slower than within the ab-plane.

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“…This observation suggests that low frequency AC‐excitations may represent an effective way to increase the resistance of the transport bridge in a controlled fashion. [ 14,19 ]…”

Section: Resultsmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 96%

Section: Ac Electric Stressmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Electrically‐Driven Oxygen Vacancy Aggregation and Displacement in YBa₂Cu₃O_7−δ Films

Collienne

Marinković

Fernández‐Rodríguez

et al. 2022

Adv Elect Materials

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show abstract

“…Using them in a flux-locked loop [2] adds the advantage of a large dynamic range. Moreover, developments in noise reduction techniques have become standard practice [3][4][5], reaching noise levels of approximately 0.1 fT/ √ Hz for low-criticaltemperature (LTc) SQUIDs [6,7] and less than 10 fT/ √ Hz for high-critical-temperature (HTc) SQUIDs [8][9][10][11][12], depending on the probing loop size [13,14]. These techniques can be used for applications that do not require bandwidth in excess of a few MHz (or 150 MHz when only the flux-locked loop technique is used).…”

Section: Introductionmentioning

confidence: 99%

Evaluation of Self-Field Effects in Magnetometers Based on Meander-Shaped Arrays of Josephson Junctions or SQUIDs Connected in Series

Crété

Kermorvant²,

Lemaı̂tre

et al. 2021

Micromachines

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Arrays of superconducting quantum interference devices (SQUIDs) are highly sensitive magnetometers that can operate without a flux-locked loop, as opposed to single SQUID magnetometers. They have no source of ambiguity and benefit from a larger bandwidth. They can be used to measure absolute magnetic fields with a dynamic range scaling as the number of SQUIDs they contain. A very common arrangement for a series array of SQUIDs is with meanders as it uses the substrate area efficiently. As for most layouts with long arrays, this layout breaks the symmetry required for the elimination of adverse self-field effects. We investigate the scaling behavior of series arrays of SQUIDs, taking into account the self-field generated by the bias current flowing along the meander. We propose a design for the partial compensation of this self-field. In addition, we provide a comparison with the case of series arrays of long Josephson junctions, using the Fraunhofer pattern for applications in magnetometry. We find that compensation is required for arrays of the larger size and that, depending on the technology, arrays of long Josephson junctions may have better performance than arrays of SQUIDs.

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Fabrication and electrical transport characterization of high quality underdoped YBa₂Cu₃O_7-δ nanowires

Andersson

Arpaia

Trabaldo

et al. 2020

Supercond. Sci. Technol.

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We present the fabrication and electrical transport characterization of underdoped YBa2Cu3O7-δ nanowires. The nanowires have been realized without any protective capping layer and they show transport properties similar to those of the parent thin film, demonstrating that they have not been damaged by the nanopatterning. The current-voltage characteristics of the underdoped nanowires show large hysteretic voltage switching at the critical current, in contrast to the flux-flow like characteristics of optimally doped nanostructures, indicating the formation of a self-stabilizing hot spot. These results open up new possibilities of using the underdoped nanowires for single photon detection and for exploring the underdoped side of the YBa2Cu3O7-δ phase diagram at the nanoscale.

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SQUID magnetometer based on Grooved Dayem nanobridges and a flux transformer

Cited by 3 publications

References 15 publications

Electrically‐Driven Oxygen Vacancy Aggregation and Displacement in YBa₂Cu₃O_7−δ Films

Electrically‐Driven Oxygen Vacancy Aggregation and Displacement in YBa₂Cu₃O_7−δ Films

Evaluation of Self-Field Effects in Magnetometers Based on Meander-Shaped Arrays of Josephson Junctions or SQUIDs Connected in Series

Fabrication and electrical transport characterization of high quality underdoped YBa₂Cu₃O_7-δ nanowires

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SQUID magnetometer based on Grooved Dayem nanobridges and a flux transformer

Cited by 3 publications

References 15 publications

Electrically‐Driven Oxygen Vacancy Aggregation and Displacement in YBa2Cu3O7−δ Films

Electrically‐Driven Oxygen Vacancy Aggregation and Displacement in YBa2Cu3O7−δ Films

Evaluation of Self-Field Effects in Magnetometers Based on Meander-Shaped Arrays of Josephson Junctions or SQUIDs Connected in Series

Fabrication and electrical transport characterization of high quality underdoped YBa2Cu3O7-δ nanowires

Contact Info

Product

Resources

About

Electrically‐Driven Oxygen Vacancy Aggregation and Displacement in YBa₂Cu₃O_7−δ Films

Electrically‐Driven Oxygen Vacancy Aggregation and Displacement in YBa₂Cu₃O_7−δ Films

Fabrication and electrical transport characterization of high quality underdoped YBa₂Cu₃O_7-δ nanowires