Fine-Tuning and Optimization of Superconducting Quantum Magnetic Sensors by Thermal Annealing

In the present article, we present the experimental results concerning the fine-tuning and optimization of superconducting quantum interference device (SQUID) parameters by thermal annealing. This treatment allows for the modification of the parameters in order to meet a specific application or to adjust the device parameters to prevent the increase of magnetic field noise and work instability conditions due to a different critical current with respect to the design value. In particular, we report the sensor critical current, the voltage–flux (V–Φ) characteristics and the spectral density of the magnetic field of SQUID magnetometers for different annealing temperatures. The measurements demonstrate that it is possible to achieve a fine control of the most important device parameters. In particular, we show that thermal annealing allows for the reduction of SQUID noise by more than a factor of 5 and makes the device working operations very stable. These results are very useful in view of quantum technology applications related to superconducting quantum computing where the correct functioning of the quantum bit depends on the fine control of the superconducting quantum device parameters and selectable annealing is possible by using a suitable laser as a thermal source.

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Magnetic Sensors for Space Applications

Electromagnetic Compatibility for Space Systems Design - Advances in Computer and Electrical Engineering ◽

10.4018/978-1-5225-5415-8.ch007 ◽

2018 ◽

pp. 248-283 ◽

Cited By ~ 1

Author(s):

Neoclis Hadjigergiou ◽

Marios Sophocleous ◽

Evangelos Hristoforou ◽

Paul Peter Sotiriadis

Keyword(s):

Magnetic Field ◽

Quantum Interference ◽

Measurement Techniques ◽

General Information ◽

Magnetic Sensors ◽

Normal Operation ◽

Space Applications ◽

Flux Gate ◽

Magneto Resistance ◽

The Magnetic Field

This chapter is composed of three parts. The first is an introductory part, providing general information about magnetism and related phenomena. Magnetic materials are also discussed and presented. Afterwards, the magnetic field and various measurement techniques are discussed. In the second part, different magnetic sensors used in a laboratory or space are presented. Magnetic sensors that are discussed include anisotropic magneto-resistance (AMR), giant magneto-resistance (GMR), giant magneto-impedance (GMI), flux-gate and superconducting quantum interference device (SQUID). Although some of them may be outdated and well known, they are widespread and they still pose an excellent choice for certain applications. Magnetic cleanliness is an important factor both in calibration and in normal operation of a system; in the third part, current techniques to isolate a system from the external magnetic field providing cleanliness are discussed.

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The Fine-Tuned Release of Antioxidant from Superparamagnetic Nanocarriers under the Combination of Stationary and Alternating Magnetic Fields

Antioxidants ◽

10.3390/antiox10081212 ◽

2021 ◽

Vol 10 (8) ◽

pp. 1212

Author(s):

Lucija Mandić ◽

Anja Sadžak ◽

Ina Erceg ◽

Goran Baranović ◽

Suzana Šegota

Keyword(s):

Magnetic Field ◽

Magnetic Fields ◽

Quantum Interference ◽

Fine Tuning ◽

Force Microscopy ◽

Peg 4000 ◽

Vis Spectroscopy ◽

Poly Ethylene ◽

Alternating Magnetic Fields

Superparamagnetic magnetite nanoparticles (MNPs) with excellent biocompatibility and negligible toxicity were prepared by solvothermal method and stabilized by widely used and biocompatible polymer poly(ethylene glycol) PEG-4000 Da. The unique properties of the synthesized MNPs enable them to host the unstable and water-insoluble quercetin as well as deliver and localize quercetin directly to the desired site. The chemical and physical properties were validated by X-ray powder diffraction (XRPD), field emission scanning electron microscopy (FE–SEM), atomic force microscopy (AFM), superconducting quantum interference device (SQUID) magnetometer, FTIR spectroscopy and dynamic light scattering (DLS). The kinetics of in vitro quercetin release from MNPs followed by UV/VIS spectroscopy was controlled by employing combined stationary and alternating magnetic fields. The obtained results have shown an increased response of quercetin from superparamagnetic MNPs under a lower stationary magnetic field and s higher frequency of alternating magnetic field. The achieved findings suggested that we designed promising targeted quercetin delivery with fine-tuning drug release from magnetic MNPs.

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Magnetic Sensors for Space Applications and Magnetic Cleanliness Considerations

Recent Trends on Electromagnetic Environmental Effects for Aeronautics and Space Applications - Advances in Mechatronics and Mechanical Engineering ◽

10.4018/978-1-7998-4879-0.ch006 ◽

2021 ◽

pp. 147-185

Author(s):

Anargyros T. Baklezos ◽

Neoclis G. Hadjigeorgiou

Keyword(s):

Magnetic Field ◽

Quantum Interference ◽

Measurement Techniques ◽

General Information ◽

Magnetic Sensors ◽

Normal Operation ◽

Space Applications ◽

Recent Trends ◽

Magneto Resistance ◽

Magnetic Cleanliness

This chapter is composed by three parts. The first is an introductory part, providing general information about magnetism and related phenomena. Magnetic materials are also discussed and presented. Afterwards, the magnetic field and various measurement techniques are discussed. In the second part, different magnetic sensors used in a laboratory or space are presented. Magnetic sensors that are discussed include anisotropic magneto-resistance (AMR), giant magneto-resistance (GMR), giant magneto-impedance (GMI), flux-gate, and superconducting quantum interference device (SQUID). Although some of them may be outdated and well known, they are widespread, and they still pose an excellent choice for certain applications. Advances in magnetometers also presented in order to provide the reader with the recent trends in the field. Magnetic cleanliness is an important factor both in calibration and in normal operation of a system; in the third part, current techniques to isolate a system from the external magnetic field providing cleanliness are discussed.

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Magnetic Emission Mapping for Passive Integrated Components Characterisation

ISTFA 2003: Conference Proceedings from the 29th International Symposium for Testing and Failure Analysis ◽

10.31399/asm.cp.istfa2003p0440 ◽

2003 ◽

Author(s):

O. Crépel ◽

Y. Bouttement ◽

P. Descamps ◽

C. Goupil ◽

P. Perdu ◽

...

Keyword(s):

Magnetic Field ◽

Mobile Phone ◽

Printed Circuit Board ◽

Magnetic Sensors ◽

Circuit Board ◽

Magnetic Disturbance ◽

Passive Components ◽

Printed Circuit ◽

Integrated Inductor ◽

The Magnetic Field

Abstract We developed a system and a method to characterize the magnetic field induced by circuit board and electronic component, especially integrated inductor, with magnetic sensors. The different magnetic sensors are presented and several applications using this method are discussed. Particularly, in several semiconductor applications (e.g. Mobile phone), active dies are integrated with passive components. To minimize magnetic disturbance, arbitrary margin distances are used. We present a system to characterize precisely the magnetic emission to insure that the margin is sufficient and to reduce the size of the printed circuit board.

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Magnetic field dependence of the critical current anisotropy in normal metal‐YBa2Cu3O7−δthin‐film bilayers

Applied Physics Letters ◽

10.1063/1.104365 ◽

1991 ◽

Vol 58 (11) ◽

pp. 1205-1207 ◽

Cited By ~ 6

Author(s):

R. H. Ono ◽

L. F. Goodrich ◽

J. A. Beall ◽

M. E. Johansson ◽

C. D. Reintsema

Keyword(s):

Magnetic Field ◽

Critical Current ◽

Field Dependence ◽

Magnetic Field Dependence ◽

Normal Metal

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Magnetic Janssen effect

Nature Communications ◽

10.1038/s41467-021-22722-y ◽

2021 ◽

Vol 12 (1) ◽

Author(s):

L. Thorens ◽

K. J. Måløy ◽

M. Bourgoin ◽

S. Santucci

Keyword(s):

Magnetic Field ◽

Dynamic Properties ◽

Radial Force ◽

Fine Tuning ◽

Apparent Mass ◽

Confined Geometries ◽

Pairwise Interactions ◽

Janssen Effect ◽

Lateral Walls ◽

Granular Column

AbstractA pile of grains, even when at rest in a silo, can display fascinating properties. One of the most celebrated is the Janssen effect, named after the pioneering engineer who explained the pressure saturation at the bottom of a container filled with corn. This surprising behavior arises because of frictional interactions between the grains through a disordered network of contacts, and the vessel lateral walls, which partially support the weight of the column, decreasing its apparent mass. Here, we demonstrate control over frictional interactions using ferromagnetic grains and an external magnetic field. We show that the anisotropic pairwise interactions between magnetized grains result in a radial force along the walls, whose amplitude and direction is fully determined by the applied magnetic field. Such magnetic Janssen effect allows for the fine tuning of the granular column apparent mass. Our findings pave the way towards the design of functional jammed materials in confined geometries, via a further control of both their static and dynamic properties.

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Induced unconventional superconductivity on the surface states of Bi2Te3 topological insulator

Nature Communications ◽

10.1038/s41467-017-02069-z ◽

2017 ◽

Vol 8 (1) ◽

Cited By ~ 22

Author(s):

Sophie Charpentier ◽

Luca Galletti ◽

Gunta Kunakova ◽

Riccardo Arpaia ◽

Yuxin Song ◽

...

Keyword(s):

Magnetic Field ◽

Topological Insulator ◽

Quantum Interference ◽

Order Parameter ◽

Thermal Strain ◽

Surface States ◽

Field Pattern ◽

Key Factors ◽

Ordered Phases ◽

Simultaneous Existence

Abstract Topological superconductivity is central to a variety of novel phenomena involving the interplay between topologically ordered phases and broken-symmetry states. The key ingredient is an unconventional order parameter, with an orbital component containing a chiral p x + ip y wave term. Here we present phase-sensitive measurements, based on the quantum interference in nanoscale Josephson junctions, realized by using Bi2Te3 topological insulator. We demonstrate that the induced superconductivity is unconventional and consistent with a sign-changing order parameter, such as a chiral p x + ip y component. The magnetic field pattern of the junctions shows a dip at zero externally applied magnetic field, which is an incontrovertible signature of the simultaneous existence of 0 and π coupling within the junction, inherent to a non trivial order parameter phase. The nano-textured morphology of the Bi2Te3 flakes, and the dramatic role played by thermal strain are the surprising key factors for the display of an unconventional induced order parameter.

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The effect of trapped flux upon the magnetic field dependence of the critical current of Josephson junctions

IEEE Transactions on Applied Superconductivity ◽

10.1109/77.403070 ◽

1995 ◽

Vol 5 (2) ◽

pp. 2388-2391 ◽

Cited By ~ 1

Author(s):

E.J. Tarte ◽

H.W. Lean ◽

J.R. Waldram

Keyword(s):

Magnetic Field ◽

Critical Current ◽

Field Dependence ◽

Josephson Junctions ◽

Magnetic Field Dependence ◽

Trapped Flux ◽

The Magnetic Field

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Magnetic field dependence of d.c. critical current for large samples of textured bulk YBaCuO

Cryogenics ◽

10.1016/0011-2275(93)90041-l ◽

1993 ◽

Vol 33 (3) ◽

pp. 256-260 ◽

Cited By ~ 5

Author(s):

T.L. Francavilla ◽

R.L. Meng ◽

P. Hor ◽

C.W. Chu ◽

J.W. Ekin ◽

...

Keyword(s):

Magnetic Field ◽

Critical Current ◽

Field Dependence ◽

Magnetic Field Dependence ◽

Large Samples

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STUDY OF THE TEXTURING IN BSCCO-AG TAPES THROUGH MAGNETIC MEASUREMENTS

International Journal of Modern Physics B ◽

10.1142/s0217979200003472 ◽

2000 ◽

Vol 14 (25n27) ◽

pp. 3159-3164

Author(s):

C. FERDEGHINI ◽

M. R. CIMBERLE ◽

G. GRASSO ◽

P. GUASCONI ◽

A. MALAGOLI ◽

...

Keyword(s):

Magnetic Field ◽

Critical Current Density ◽

Critical Current ◽

Current Density ◽

Magnetic Measurements ◽

Texture Evolution ◽

Rolling Direction ◽

Longitudinal Direction ◽

Magnetic Method ◽

Superconducting Compounds

We have developed a method that allows, by a simple set of magnetic measurements, to study the texturing of the grains inside a BSCCO-Ag tape. Because the texture is anisotropic we define the angle ϑ L that identifies the mean grain misalignment angle with respect to the tape surface in longitudinal direction (i.e. rolling direction) and the angle ϑ T in transverse direction. The technique is based on the assumption that, because of the very high anisotropy of the critical current density in BSCCO superconducting compounds, the magnetic moment is essentially generated by the current circulating in the a-b planes of the BSCCO grains. The different magnetisation cycles, measured when the orientation of the magnetic field with respect to the tape surface is changed, depend only on the grain orientation inside the tape, which determines the effective magnetic field component normal to the a-b planes of the grains. Here we present the texture evolution of the BSCCO grains inside silver sheated multifilamentary tape starting from the initial steps of the mechanical deformation up to the final heating stage. The results obtained from the magnetic method are compared with those obtained with other methods, i.e. X-ray diffraction and critical current density anisotropy. Also results obtained on samples prepared in different way will be presented.

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