TRANSPORT PROPERTIES OF JOSEPHSON JUNCTIONS AND SQUIDS EMPLOYING DIFFERENT TYPES OF YBCO GRAIN BOUNDARIES OBTAINED THROUGH THE BIEPITAXIAL TECHNIQUE

2000 ◽  
Vol 14 (25n27) ◽  
pp. 3074-3079 ◽  
Author(s):  
F. CARILLO ◽  
F. LOMBARDI ◽  
F. MILETTO GRANOZIO ◽  
V. PUNZO ◽  
F. RICCI ◽  
...  
Keyword(s):  
Magnetic Field ◽  
Grain Boundary ◽  
Grain Boundaries ◽  
Experimental Evidence ◽  
Transport Properties ◽  
Circuit Design ◽  
Quantum Interference ◽  
Superconducting Quantum Interference Devices ◽  
Different Types ◽  
Seed Layers

Concepts and experimental procedures to obtain different types of YBa 2 Cu 3 O 7 grain boundaries Josephson junction through the biepitaxial technique have been developed. Various seed layers (MgO, CeO 2 and SrTiO 3) and substrates (MgO, SrTiO 3) have been used providing, for the biepitaxial technique, additional flexibility in circuit design. A detailed investigation on transport properties evidenced good performances for both junctions and superconducting quantum interference devices. Experimental evidence is given of a conventional magnetic field behavior in 45° tilt Artificial Grain Boundary (AGB) for which no π-loops are predicted along the interface.

Texture Formation and Improvement of Grain Boundary Weak‐Links in Tape Shaped Wire Prepared by the Unidirectional Solidification Technique.

1989 ◽  
Vol 169 ◽  
Author(s):  
Michiya Okada ◽  
Toyotaka Yuasa ◽  
Tosimi Matsumoto ◽  
Katuzo Aihara ◽  
Masahiro Seido ◽  
...  
Keyword(s):  
Magnetic Field ◽  
Grain Boundary ◽  
Grain Boundaries ◽  
Fine Particles ◽  
Unidirectional Solidification ◽  
Weak Links ◽  
Second Phase ◽  
Texture Formation

AbstractAu‐Sheathed Y‐Ba‐Cu‐O(YBCO) and Tl‐Ba/Sr‐Ca‐Cu‐O(TBSCCO) tapes were fabricated by the drawing‐rolling and subsequent unidirectional solidification. A typical microstructure of melt‐textured polycrystallite including fine particles of second phase(e.q. Y‐211) was observed. The Tl‐2223 tapes prepared at an optimized condition yielded Jc=15,300 A/cm2 at 77K in the absence of magnetic field, and l,100A/cm2 in a magnetic field of IT. The enhancement of Jc in a magnetic field is suggested to be due to the improvement of weak‐links in grain boundaries.

scholarly journals Magnetoelectric Magnetic Field Sensors: A Review

Sensors ◽  
2021 ◽  
Vol 21 (18) ◽  
pp. 6232
Author(s):  
Mirza Bichurin ◽  
Roman Petrov ◽  
Oleg Sokolov ◽  
Viktor Leontiev ◽  
Viktor Kuts ◽  
...  
Keyword(s):  
Magnetic Field ◽  
Lithium Niobate ◽  
Electric Fields ◽  
Quantum Interference ◽  
High Sensitivity ◽  
Electric Polarization ◽  
New Materials ◽  
Magnetic Field Sensors ◽  
Superconducting Quantum Interference Devices ◽  
Superconducting Quantum Interference

One of the new materials that have recently attracted wide attention of researchers are magnetoelectric (ME) composites. Great interest in these materials is due to their properties associated with the transformation of electric polarization/magnetization under the influence of external magnetic/electric fields and the possibility of their use to create new devices. In the proposed review, ME magnetic field sensors based on the widely used structures Terfenol—PZT/PMN-PT, Metglas—PZT/PMN-PT, and Metglas—Lithium niobate, among others, are considered as the first applications of the ME effect in technology. Estimates of the parameters of ME sensors are given, and comparative characteristics of magnetic field sensors are presented. Taking into account the high sensitivity of ME magnetic field sensors, comparable to superconducting quantum interference devices (SQUIDs), we discuss the areas of their application.

Grain boundary wetting of different types of grain boundaries in the Cu–Ag system

2020 ◽  
Vol 272 ◽  
pp. 127730 ◽  
Author(s):  
Ivan Mazilkin ◽  
Kristina Tsoy ◽  
Alexander Straumal ◽  
Alexey Rodin ◽  
Brigitte Baretzky
Keyword(s):  
Grain Boundary ◽  
Grain Boundaries ◽  
Different Types ◽  
Grain Boundary Wetting

DC Superconducting Quantum Interference Devices with BiSrCaCuO Bicrystal Grain Boundary Junctions at 77 K

1996 ◽  
Vol 35 (Part 2, No. 3B) ◽  
pp. L391-L393 ◽  
Author(s):  
Tetsuya Takami ◽  
Ken'ichi Kuroda ◽  
Junji Tanimura ◽  
Kazuyoshi Kojima ◽  
Masahiro Nunoshita ◽  
...  
Keyword(s):  
Grain Boundary ◽  
Quantum Interference ◽  
Superconducting Quantum Interference Devices ◽  
Superconducting Quantum Interference

NanoSQUIDs Applied to the Investigation of Small Magnetic Systems

2017 ◽  
Author(s):  
M.J. Martínez-Pérez ◽  
R. Kleiner ◽  
D. Koelle
Keyword(s):  
Magnetic Field ◽  
Josephson Junctions ◽  
Quantum Interference ◽  
Magnetic Systems ◽  
Superconducting Quantum Interference Devices ◽  
Stray Magnetic Field ◽  
Phase Dynamics ◽  
Superconducting Quantum Interference ◽  
Practical Constraints

This article discusses the use of nanoSQUIDs for investigating small magnetic systems. It begins with an overview of the basics of superconducting quantum interference devices, focusing on how a dc SQUID operates and the use of resistively and capacitively shunted junction model to describe the phase dynamics of Josephson junctions (JJs). It then considers the motivation for using nanoSQUIDs, along with the importance of their size and geometry. It also evaluates micro- and nanoSQUIDs made of various types of JJs including nanoSQUIDs based on sandwich-like junctions, constriction-like junctions, and proximized structures. After reviewing different nanoSQUID readout methods that can be used to directly sense the stray magnetic field created by a nanoscale magnetic sample, the article concludes by highlighting some of the practical constraints and challenges encountered in using nanoSQUID technology, including particle positioning with respect to the sensor’s surface.

The Control of Texture and Grain Boundary Microstructure by Magnetic Annealing

2005 ◽  
Vol 495-497 ◽  
pp. 1151-1158 ◽  
Author(s):  
Tadao Watanabe ◽  
Sadahiro Tsurekawa ◽  
H. Fujii ◽  
T. Kanno
Keyword(s):  
Magnetic Field ◽  
Grain Boundary ◽  
Grain Growth ◽  
Nanocrystalline Material ◽  
Amorphous State ◽  
Magnetic Annealing ◽  
Fine Grained ◽  
Different Types ◽  
Rapidly Solidified ◽  
Boundary Microstructure

This paper gives an overview of our recent works on the effect of magnetic annealing, i.e. annealing in a magnetic field, on the evolution of texture and grain boundary microstructure in ultra-fine grained and nanocrystalline magnetic materials differently produced; rapidly solidified Fe-6.5mass%Si ribbons, electrodeposited nanocrystalline nickel, and nanocrystalline Fe78Si9B13 alloy ribbon crystallized from the amorphous state. It was found that the effect of magnetic annealing was powerful and useful for controlling grain growth resulting in the evolution of different types of texture and grain boundary microstructure, depending on the condition of magnetic annealing. In particular, the magnetic crystallization of amorphous Fe78Si9B13 alloy was found to be powerful for producing a nanocrystalline material with a sharp texture and a special grain boundary microstructure.

Possible evidence for overcoordination at semiconductor grain boundaries

1990 ◽  
Vol 5 (3) ◽  
pp. 587-592 ◽  
Author(s):  
W. Krakow ◽  
A. A. Levi ◽  
S. T. Pantelides
Keyword(s):  
High Resolution ◽  
Grain Boundary ◽  
Grain Boundaries ◽  
Experimental Evidence ◽  
Screw Dislocation ◽  
Electron Micrograph ◽  
Resolution Electron ◽  
Tilt Grain Boundary

The structure of a near coincidence Ge tilt grain boundary, containing a step, has been derived from a high resolution electron micrograph. There are two possible interpretations of portions of this interface, one of which is the existence of a sheet of fivefold coordinated atoms between the Σ = 19 and Σ = 27 coincidence misorientations. This finding may represent the first experimental evidence that overcoordinated atoms are present at semiconductor grain boundaries free of a screw dislocation.

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