Significant Correlations Between Levitation-Suspension Forces and Critical Current Densities in Bulk YBCO/Ag Composite Superconductors Fabricated by Infiltration and Growth Processing Technique

Parthasarathy, Raghuveer; Seshubai,

doi:10.1007/s10948-016-3431-4

Cited by 4 publications

(2 citation statements)

References 52 publications

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“…Table 1 presents the maximum values of the gap of the force ∆F for both samples in the FC regime and the distance z M at which this occurs. The hysteresis in the force is the main characteristic of the interaction HTS-PM because the gap of the force is directly related to the critical current density and the magnetization of the superconducting sample [26,34]. Therefore, the gap ∆F is an indicator of the quality of the superconductor.…”

Section: Resultsmentioning

confidence: 99%

“…The force measurement is done by varying the distance HTS-PM and therefore many types of measurement systems have been designed to measure the force in one, two or three spatial dimensions [22][23][24]. Important characteristics of the superconductors like critical currents, magnetization, etc., can be deduced from these measurements [25,26]. However, since both the levitation and suspension phenomena in an HTS-PM system are determined when the interaction force has the opposite direction to gravity, which compensates the weight of the HTS or the PM, the most common measurement of this type of interaction is the one performed vertically [27].…”

Section: Introductionmentioning

confidence: 99%

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Levitation and Suspension Forces Measurement System for High Tc Superconductors

Rojas

Arias

Mariño

2020

Momento

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The interaction forces, attraction (suspension) and repulsion (levitation) between a permanent magnet and different bulk Yttrium-based superconductors were carried out with an automatic system developed in our group, which is reproducible, reliable and low cost. Two superconducting samples of YBa 2 Cu 3 O 7−δ (YBCO) prepared by solid-state reaction method (S) and by the melt-textured growth method (MTG) were used. Both samples were characterized by XRD technique and presented the characteristic peaks and intensity relations of the YBCO-123 superconducting phase. Oxygen deficiencies δ > 0,15 and δ < 0,10 for the S and MTG samples respectively, were observed. Both samples displayed different hysteresis behavior in the Force (F ) vs. Distance (z) measurements when they were field cooled (FC) and zero field cooled (ZFC). This behavior agrees with hysteresis loops observed in magnetization measurements. Both levitation and suspension phenomena were observed in the MTG sample with large hysteresis loops of the force. On the contrary, the S sample with small hysteresis loops did not show a suspension force, only displayed a slight levitation force.

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Section: Resultsmentioning

confidence: 99%