Determination of critical current density in bulk melt-processed high temperature superconductors from levitation force measurements

@article{Kordyuk1999DeterminationOC,
  title={Determination of critical current density in bulk melt-processed high temperature superconductors from levitation force measurements},
  author={Alexander A. Kordyuk and Vladimir Vladimirovich Nemoshkalenko and R. V. Viznichenko and Tobias Habisreuther and Wolfgang Gawalek},
  journal={Applied Physics Letters},
  year={1999},
  volume={75},
  pages={1595-1597}
}
A simple approach to describe levitation force measurements on bulk melt-processed high temperature superconductors was developed. A couple of methods to determine the critical current density Jc were introduced. The averaged a-b-plane Jc values for the field parallel to this plane were determined. The first and second levitation force hysteresis loops calculated with these Jc values coincide remarkably well with the experimental data. 
9 Citations

Figures from this paper

Calculating levitation forces in the magnet-high-temperature superconductor systems
A new method of calculation of the magnetic levitation force in the permanent magnet-high-temperature superconductor systems is proposed based on the Maxwell equations and the Bean model. The
Significant Correlations Between Levitation-Suspension Forces and Critical Current Densities in Bulk YBCO/Ag Composite Superconductors Fabricated by Infiltration and Growth Processing Technique
We report on significant correlations between the levitation-suspension forces and critical current densities in bulk YBCO/Ag composite superconductors fabricated by infiltration and growth
Simple technique for quality estimation of superconducting joints in bulk melt-processed high temperature superconductors
We propose an empirical approach to estimate the quality of superconducting joints (welds) between blocks of bulk high temperature superconductors (HTS). As a measuring value, we introduce a quality
Effect of the characteristics of a superconductor on the levitation properties of the magnet-superconductor system
The results of the experimental and theoretical investigations of the magnetic levitation force appearing at the interaction of the multilayer superconducting block of the YBa2Cu3O7−x melted textured
Transparency of Planar Interfaces in Superconductors: A Critical-State Analysis
The problem of determining the transparency of current flow through a planar interface connecting two superconducting parts, being bulks, tapes, or films, is analyzed within the critical-state model.
A new method of determining the reversible magnetization loop of bulk high-temperature superconductors
A new method of calculation of the magnetization loop of bulk high-temperature superconductors is proposed which employs the results of measurements of the magnetic levitation force.
Magnetic flux dynamics in HTS bulks with levitation techniques
The discovery of high-temperature superconductors (HTS) has led to understanding that, in order to explain and utilize the phenomenon, completely new physical approaches should be introduced at all
Study of the Dynamics of Vortex Structures in Bulk HTS with Levitation Techniques
The discovery of high temperature superconductors (HTS) has led to understanding that, in order to explain and utilize the phenomenon, completely new physical approaches should be introduced at all

References

SHOWING 1-10 OF 32 REFERENCES
Magnetic levitation for hard superconductors
An approach for calculating the interaction between a hard superconductor and a permanent magnet in the field-cooled case is proposed. The exact solutions were obtained for the point magnetic dipole
Resonance oscillations of a permanent magnet levitated above granular superconductors
We have studied the interaction of alternating magnetic fields with granular high temperature superconductors (HTSC) with a magnetization distribution in the HTSC volume. The expressions for
Friction in levitated superconductors
A type I superconductor levitated above a magnet of low symmetry has a unique equilibrium position about which it may oscillate freely. In contrast, a type II superconductor has a continuous range of
Dynamic magnetic forces in superconducting ceramics
Dynamic forces between small permanent magnets and bulk high‐Tc superconducting ceramic materials have been measured, including magnetic stiffness and damping effects. The vibration frequencies and
Melt textured YBCO samples for trapped field magnets and levitating bearings
Bulk melt textured YBCO materials in the shape of disks are being developed for use as trapped field magnets and in superconducting bearings. The trapped field in the gap between two disks of 26 mm
Flywheels on a roll
Superconducting bearings promise to reduce friction by up to two orders of magnitude, auguring flywheels in the 10-kWh class. The author discusses the principles of stable magnetic levitation of
APPL
TLDR
A prototype probability package named APPL (A Probability Programming Language) is presented that can be used to manipulate random variables and examples illustrate its use.
...
...