Effect of the Temperature, External Magnetic Field, and Transport Current on Electrical Properties, Vortex Structure Evolution Processes, and Phase Transitions in Subsystems of Superconducting Grains and “Weak Links” of Granular Two-Level High-Temperature Superconductor YBa2Cu3O7–δ

2018 ◽  
Vol 60 (3) ◽  
pp. 470-480 ◽  
Author(s):  
V. V. Derevyanko ◽  
T. V. Sukhareva ◽  
V. A. Finkel’
Keyword(s):  
Magnetic Field ◽  
Phase Transitions ◽  
High Temperature ◽  
Electrical Properties ◽  
External Magnetic Field ◽  
Vortex Structure ◽  
High Temperature Superconductor ◽  
Transport Current ◽  
Structure Evolution ◽  
Weak Links

scholarly journals Measurements and Analysis of AC Losses in HTS Windings of Electrical Machine for Different Operation Modes

2021 ◽  
Vol 11 (6) ◽  
pp. 2741
Author(s):  
Sergey Zanegin ◽  
Nikolay Ivanov ◽  
Vasily Zubko ◽  
Konstantin Kovalev ◽  
Ivan Shishov ◽  
...  
Keyword(s):  
Magnetic Field ◽  
High Temperature ◽  
High Temperature Superconductor ◽  
High Temperature Superconductors ◽  
Transport Current ◽  
Operating Conditions ◽  
Ac Losses ◽  
Electrical Machine ◽  
2Nd Generation ◽  
Motor Mode

The article is devoted to the study of losses in devices based on high-temperature superconductors of the 2nd generation. The complexity of the devices under study increases from a single rack coil to a winding assembled from several coils, and finally to an electric machine operating in generator mode. This is the way to experimentally study the behavior of 2nd generation high temperature superconductor (2G HTS) carrying a transport current in various conditions: self-field, external DC, and AC magnetic field. Attention is also paid to the losses in the winding during its operation from the inverter, which simulates the operating conditions in the motor mode of a propulsion system.

Magnetic Polaritons on the Interface of Superconductor and Ferromagnet

2009 ◽  
Vol 152-153 ◽  
pp. 369-372 ◽  
Author(s):  
D.G. Sannikov ◽  
D.I. Sementsov ◽  
S.V. Zhirnov
Keyword(s):  
Magnetic Field ◽  
High Temperature ◽  
External Magnetic Field ◽  
High Temperature Superconductor ◽  
Transverse Electric ◽  
Interface Structure ◽  
Dispersive Equation ◽  
Surface Polaritons ◽  
Magnetic Polaritons ◽  
Crystallographic Axes

In the present paper the dispersive equation for surface polaritons localized at the ferromagnet - high temperature superconductor interface structure have been obtained. The main characteristics dependences upon the external magnetic field are analyzed in the frame of the electromagnetic approach for transverse electric (TE) polarization wave. The analysis for different orientations of superconductor crystallographic axes relative to wave vector directions is carried out.

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