Particle Irradiation Induced Defects in High Temperature Superconductors

MRS Advances ◽  
2019 ◽  
Vol 4 (2) ◽  
pp. 119-124 ◽  
Author(s):  
Prashanta Mani Niraula ◽  
Eiman Bokari ◽  
Shahid Iqbal ◽  
Lisa Paulius ◽  
Matthew Smylie ◽  
...  
Keyword(s):  
High Temperature ◽  
High Temperature Superconductors ◽  
Vortex Pinning ◽  
Coated Conductors ◽  
Barium Zirconate ◽  
High Temperature Superconducting ◽  
Particle Irradiation ◽  
Induced Defects ◽  
Irradiation Induced Defects ◽  
Cu Ions

AbstractWe use irradiation with 50-MeV Cu-ions to create vortex pinning defects in high-temperature superconducting Y1Ba2Cu3O7-x coated conductors using a beam-rastering approach that allows for the uniform irradiation of large ample areas. Our samples contain barium zirconate nanorods as pre-existing vortex pinning defects. By irradiating the samples at angles of 0o, 15oand 30o from the crystallographic c-axis we explore the interplay between pre-existing and irradiation-induced pinning and find that irradiation at 30o leads to a moderate enhancement of Jc at 5 K at high fields (greater than 2 Tesla). In contrast, Jc was suppressed for all temperatures and fields for other angles of irradiation. Optimized particle irradiation procedures offer a way for improving the performance of high-temperature superconducting wires for use in high magnetic fields without the need for changing wire synthesis protocols.

scholarly journals Investigations on Quench Recovery Characteristics of High-Temperature Superconducting Coated Conductors for Superconducting Fault Current Limiters

Electronics ◽  
2021 ◽  
Vol 10 (3) ◽  
pp. 259
Author(s):  
Wei Chen ◽  
Peng Song ◽  
Hao Jiang ◽  
Jiahui Zhu ◽  
Shengnan Zou ◽  
...  
Keyword(s):  
High Temperature ◽  
Smart Grids ◽  
Recovery Time ◽  
Coated Conductors ◽  
Transfer Model ◽  
Fault Current ◽  
High Temperature Superconducting ◽  
Fault Current Limiters ◽  
Recovery Characteristic ◽  
The Impact

Superconducting fault current limiters (SFCLs) are attracting increasing attention due to their potential for use in modern smart grids or micro grids. Thanks to the unique non-linear properties of high-temperature-superconducting (HTS) tapes, an SFCL is invisible to the grid with faster response compared to traditional fault current limiters. The quench recovery characteristic of an HTS tape is fundamental for the design of an SFCL. In this work, the quench recovery time of an HTS tape was measured for fault currents of different magnitudes and durations. A global heat transfer model was developed to describe the quench recovery characteristic and compared with experiments to validate its effectiveness. Based on the model, the influence of tape properties on the quench recovery time was discussed, and a safe margin for the impact energy was proposed.

TEMPERATURE DEPENDENCE OF THE HALL EFFECT IN La2−xSrxCuO4 AND ABa2Cu3O7 (A=Y, Gd) HIGH TEMPERATURE SUPERCONDUCTORS

1987 ◽  
Vol 01 (03n04) ◽  
pp. 1067-1070 ◽  
Author(s):  
M. Petravić ◽  
A. Hamzić ◽  
B. Leontić ◽  
L. Forró
Keyword(s):  
High Temperature ◽  
Temperature Dependence ◽  
Hall Effect ◽  
Normal State ◽  
High Temperature Superconductors ◽  
The Other ◽  
Hall Constant ◽  
High Temperature Superconducting ◽  
Superconducting Ceramics ◽  
Hall Effect Measurements

We present Hall effect measurements in the normal state of the high temperature superconducting ceramics La2−xSrxCuO4 (x=0, 0.1, 0.15, 0.2, 0.25, 0.3), YBa2Cu3o7 and GdBa2Cu3O7 . The first family has temperature independent Hall constant for x>0, while in the other two systems RH is proportional to 1/T. From the Hall effect it follows that the transport in these compounds is hole-like.

Laser-Assisted Field Evaporation of (R = Gd, Sm) High-Temperature Superconducting Coated Conductors

2021 ◽  
pp. 1-18
Author(s):  
Jesse D. Smith ◽  
Jeong Huh ◽  
Adam Shelton ◽  
Richard F. Reidy ◽  
Marcus L. Young
Keyword(s):  
High Temperature ◽  
High Temperature Superconductors ◽  
Compositional Analysis ◽  
Atom Probe ◽  
Fracture Probability ◽  
Coated Conductors ◽  
Field Evaporation ◽  
Laser Absorption ◽  
New Instrument ◽  
New Perspective

In the field of high-temperature superconductors, atom probe tomography is a relatively new instrument, with the ability to provide a new perspective on the 3D nanoscale microstructure. However, field evaporation of nonmetallic materials is fraught with unique challenges that matter little in the world of metallic evaporation. In this study, we review the laser absorption, correlated evaporation, molecular dissociation, and the crystallographic effects on the field evaporation of 800-m ${\rm RB}{\rm a}_ 2{\rm C}{\rm u}_ 3{\rm O}_{ 7-{\rm \delta }}$ (R = Gd, Sm) coated conductor tapes deposited by Reactive Co-Evaporation Cyclic Deposition and Reaction (RCE-CDR). Ultraviolet 355 nm laser pulsing was found to have a substantial beneficial effect on minimizing the fracture probability compared with 532 nm illumination, especially when evaporating insulating oxide precipitates. This, in turn, allows for the 3D compositional analysis of defects such as flux pinning centers introduced by precipitation and doping. As a result, evidence for the precipitation of nanoscale ${\rm G}{\rm d}_ 2{\rm C}{\rm u}_ 2{\rm O}_ 5$ is discussed. The effect of crystallographic orientation is studied, where [001] aligned evaporation is found to develop compositional aberrations.

Numerical Study on Overcurrent Process of High-Temperature Superconducting Coated Conductors

2016 ◽  
Vol 30 (11) ◽  
pp. 3263-3270 ◽  
Author(s):  
J. Sheng ◽  
D. Hu ◽  
K. Ryu ◽  
H. S. Yang ◽  
Z. Y. Li ◽  
...  
Keyword(s):  
High Temperature ◽  
Numerical Study ◽  
Coated Conductors ◽  
High Temperature Superconducting

Modeling and verification of the equivalent circuit for high temperature superconducting partial-core transformer with ReBCO-coated conductors

2018 ◽  
Vol 37 (3) ◽  
pp. 1228-1243
Author(s):  
Daoyu Hu ◽  
Jianwen Zhang ◽  
Feng Gu ◽  
Zhuyong Li
Keyword(s):  
High Temperature ◽  
Equivalent Circuit ◽  
Modeling Method ◽  
Coated Conductors ◽  
Ac Losses ◽  
Content Type ◽  
High Temperature Superconducting ◽  
Iterative Computation ◽  
Core Losses ◽  
New Type

Purpose The purpose of this study is to propose a modeling method of the equivalent circuit for a new type of high-temperature superconducting partial-core transformer (HTS-PCT) made of ReBCO-coated conductors. Design/methodology/approach The modeling process is based on the “Steinmetz” equivalent circuit. The impedance components in the circuit are obtained by the calculations of the core losses and AC losses of the HTS windings by using theoretical methods. An iterative computation is also used to decide the equivalent resistances of the AC losses of the primary and secondary HTS windings. The reactance components in the circuit are calculated from the energy stored in the magnetic fields by finite element method. The validation of the modeling method is verified by experimental results Findings The modeling method of the equivalent circuit of HTS-PCT is valid, and an equivalent circuit for HTS-PCT is presented. Practical implications The equivalent circuit of HTS-PCT could be obtained by the suggested modeling method. Then, it is easy to analyze the characteristics of the HTS-PCT by its equivalent circuit. Moreover, the modeling method could also be useful for the design of a specific HTS-PCT. Originality/value The study proposes a modeling method of the HTS-PCT made of the second-generation HTS tapes, i.e. ReBCO-coated conductors.

Vibrating reed studies of vortex pinning in high temperature superconductors

1993 ◽  
Vol 195 ◽  
pp. 419-426 ◽  
Author(s):  
A. Gupta ◽  
Y. Kopelevich ◽  
P. Esquinazi ◽  
F.I. Schulz ◽  
H.F. Braun
Keyword(s):  
High Temperature ◽  
High Temperature Superconductors ◽  
Vortex Pinning ◽  
Vibrating Reed

Reverse martensitic phase transformation induced in Nb–Co multilayers by ion irradiation

1994 ◽  
Vol 9 (2) ◽  
pp. 357-361 ◽  
Author(s):  
B.X. Liu ◽  
Z.J. Zhang
Keyword(s):  
Phase Transformation ◽  
High Temperature ◽  
Solid State ◽  
Room Temperature ◽  
Ion Irradiation ◽  
Martensitic Phase ◽  
Martensitic Phase Transformation ◽  
Step Transition ◽  
Induced Defects ◽  
Irradiation Induced Defects

A reverse martensitic phase transformation was observed in Nb-enriched Nb-Co multilayers induced by room temperature 200 ke V xenon ion mixing. Further experiments revealed that this bcc-fcc transition proceeds in two steps, i.e., bcc-hcp and hcp-fcc. A crystallographic model is proposed to explain the two-step transition through shearing and sliding, which are mediated by irradiation-induced defects and strain in the films. In addition, the existence of the hcp and fcc metastable states in the Nb-Co system was confirmed by high-temperature solid state interdiffusion of the corresponding multilayers.

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