Observation of partial Meissner effect and flux pinning in superconducting lead containing non-superconducting parts

Treimer, W.; Ebrahimi, O.; Karakas, N.

doi:10.1063/1.4762860

Cited by 28 publications

(21 citation statements)

References 27 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…* taowang@berkeley.edu Superconducting levitation has been widely studied, but usually with cm-scale magnets [6,7]. Here we study superconducting levitation of a micron-scale magnet, which exhibits dynamic behavior distinct from that of cm-scale ferromagnets levitated above superconductors because of the much smaller levitation height that is comparable with the dimensions of flux-pinning sites [8].…”

Section: Introductionmentioning

confidence: 99%

Dynamics of a Ferromagnetic Particle Levitated over a Superconductor

et al. 2019

View full text Add to dashboard Cite

Under conditions where the angular momentum of a ferromagnetic particle is dominated by intrinsic spin, applied torque is predicted to cause gyroscopic precession of the particle. If the particle is sufficiently isolated from the environment, a measurement of spin precession can potentially yield sensitivity to torque beyond the standard quantum limit. Levitation of a micron-scale ferromagnetic particle above a superconductor is a possible method of near frictionless suspension enabling observation of ferromagnetic particle precession and ultrasensitive torque measurements. We experimentally investigate the dynamics of a micron-scale ferromagnetic particle levitated above a superconducting niobium surface. We find that the levitating particles are trapped in potential minima associated with residual magnetic flux pinned by the superconductor and, using an optical technique, characterize the quasiperiodic motion of the particles in these traps.

show abstract

Section: Introductionmentioning

confidence: 99%

Dynamics of a Ferromagnetic Particle Levitated over a Superconductor

et al. 2019

View full text Add to dashboard Cite

show abstract

“…The YBa 2 Cu 3 O 7À (YBCO or Y123) high-temperature superconductor has attracted a significant amount of attention since it was discovered in 1987 (Campbell & Cardwell, 1997;Werfel et al, 2012;Krabbes et al, 2006). Single crystals with a large size and high quality are extremely important for device applications (Bean, 1962;Ren et al, 1993;Morita et al, 1998;Fuchs et al, 2000;Tomita & Murakami, 2003;Babu et al, 2005;Treimer et al, 2012;Kenfaui et al, 2013Kenfaui et al, , 2015Grissonnanche et al, 2014) and fundamental studies (Krabbes et al, 2006;Headings et al, 2011). Of all the methods for growing YBCO single crystals, the self-flux technique (Krauns et al, 1994) is popularly used for producing small crystals.…”

Section: Introductionmentioning

confidence: 99%

Film thermal stability correlation with seeding modes in the growth of YBa₂Cu₃O_7−δcrystals

Xiang

Wang

et al. 2016

J Appl Cryst

View full text Add to dashboard Cite

High-quality and large YBa 2 Cu 3 O 7À (YBCO or Y123) single crystals are necessary for both fundamental studies and practical applications. The recently exploited modified melt growth (MMG) procedure realizes a high efficiency of growth and high purity of Y123. However, it was unexpectedly found that the thermal stability of the NdBa 2 Cu 3 O 7À (Nd123) film seed applied in MMG is greatly reduced owing to a change in the liquid property. In order to solve this problem, a new top-seeding mode, buried seeding, is developed to strengthen the film thermal stability, leading to a remarkable enhancement of endurable maximum processing temperature of over 30 K in low supersaturation. Furthermore, the correlation of the thermal stability of the film seed in melt growth with the liquid property and top-seeding modes is clarified. Most importantly, the buried-seeding mode was successfully applied in this work, opening a promising pathway for the effective growth of single crystals of other REBCO (RE = Nd, Sm, Gd) oxides (possessing a higher peritectic temperature than YBCO), as well as other functional oxides.

show abstract

“…However, superconducting samples are typically inhomogenous at a morphological level much coarser than the crystals they are made of: bulk superconductors [3,4,5,6,7,8], wires [9], tapes [10,11], and coated superconductors [12,13,14] display different levels of "granularity". For example, BSCCO-Ag tapes consist in filaments made from superconducting grains that are very well connected along the wide face of the tape, embedded in a non-superconducting matrix.…”

Section: Introductionmentioning

confidence: 99%

In-plane transport anisotropy in BSCCO-Ag multi-filamentary tapes

Borroto

García-Gordillo

Río

et al. 2015

Supercond. Sci. Technol.

View full text Add to dashboard Cite

Abstract. Composite structures such as High-Tc multi-filamentary tapes display a complex anisotropy arising from the combination of the "intrinsic" anisotropy of the Bi-2223 grains, and that associated to the superconducting phase distribution in the superconductor-metal composite, as well as cracks and other defects. In this paper we characterize the "in-plane" anisotropy of BSCCO-Ag tapes, i.e., the difference between the transport properties along the longitudinal axis and those along the transverse direction also lying on the wide face of the tape. In particular, we demonstrate that the dissipation associated to transport along the transverse direction approaches that of the longitudinal direction as the temperature or the current increase, which may be relevant to transport applications in situations where the superconducting properties have significantly degraded.PACS numbers: 84.71. Mn, 74.25.Sv

show abstract

Observation of partial Meissner effect and flux pinning in superconducting lead containing non-superconducting parts

Cited by 28 publications

References 27 publications

Dynamics of a Ferromagnetic Particle Levitated over a Superconductor

Dynamics of a Ferromagnetic Particle Levitated over a Superconductor

Film thermal stability correlation with seeding modes in the growth of YBa₂Cu₃O_7−δcrystals

In-plane transport anisotropy in BSCCO-Ag multi-filamentary tapes

Contact Info

Product

Resources

About

Observation of partial Meissner effect and flux pinning in superconducting lead containing non-superconducting parts

Cited by 28 publications

References 27 publications

Dynamics of a Ferromagnetic Particle Levitated over a Superconductor

Dynamics of a Ferromagnetic Particle Levitated over a Superconductor

Film thermal stability correlation with seeding modes in the growth of YBa2Cu3O7−δcrystals

In-plane transport anisotropy in BSCCO-Ag multi-filamentary tapes

Contact Info

Product

Resources

About

Film thermal stability correlation with seeding modes in the growth of YBa₂Cu₃O_7−δcrystals