Levitation forces of a single-grained Y-Ba-Cu-O bulk superconductor of 48 mm in diameter

Teshima, Hidekazu; Sawamura, Mitsuru; Morita, Mitsuru; Tsuchimoto, M.

doi:10.1016/s0011-2275(97)00084-2

Cited by 26 publications

(14 citation statements)

References 6 publications

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“…Lugo et al [5] and Cruz et al [6] explained this feature in the case of small magnet levitating above a superconducting cylinder of considerable thickness. The same behavior is also clear in the work of Teshima et al [4] who demonstrated experimentally the size effects of a permanent magnetic cylinder levitating above a superconducting cylinder of the same symmetry axis. In our case, the levitation force increases exponentially and then tends to vary linearly as a function of the SC radius.…”

Section: Resultssupporting

confidence: 68%

“…Davis et al [3] studied the stability of magnets levitated above superconductors by considering the vertical and radial components of the force on a dipole magnet over a perfectly diamagnetic disk. The numerical and experimental levitation force on a cylindrical magnet floating above a superconducting cylinder was described by Teshima et al [4]. The experimental levitation forces were measured by changing the magnet radius.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Size Effects on Levitation Force Between a Magnet and a Superconducting Thin Film in the Meissner State

Alzoubi

Alqadi

Al-Khateeb

et al. 2011

J Supercond Nov Magn

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The levitation force between a permanent magnetic disk and a thin superconducting disk in the Meissner state is calculated using the dipole-dipole interactions model. The levitation force as a function of the magnet and superconductor radii, the levitation height, and the superconductor thickness is studied under the assumption that the radius of the magnet is much smaller than the radius of the superconductor. Results showed an increase in the levitation force as a function of the radius of the superconducting disk. However, the levitation force decreases as the radius of the permanent magnetic disk increases. Demagnetizing effects are taken into account by considering the appropriate demagnetizing factor for the suggested system.

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Section: Resultssupporting

confidence: 68%

Section: Introductionmentioning

confidence: 99%

Size Effects on Levitation Force Between a Magnet and a Superconducting Thin Film in the Meissner State

Alzoubi

Alqadi

Al-Khateeb

et al. 2011

J Supercond Nov Magn

View full text Add to dashboard Cite

show abstract

“…To incorporate temperature variation into the dynamics model, the formulation for the mobile and frozen image magnetic moment dipoles include a scaling factor ( | ) given by Eq. (14) and (15). is the temperature in which the superconductor operates and is the reference temperature in which the levitation force was measured, separated by the condition given operator '|'.…”

Section: Figure 2: Comparison Of Chiang and Jiang's Results On Levitamentioning

confidence: 99%

“…A comparable representation of the magnetization behavior is the percentage of total magnetic flux from the source dipole penetrating the volume of the superconductor. The relative size of the magnet and superconductor scales the percentage of flux captured in the superconductor 15 . The embedded magnetic field is agnostic to the location of the field-cooled magnet, which is valid for an infinite plane, but invalid for a superconductor of finite surface 16 .…”

Section: Frozen Image Model Derivationmentioning

confidence: 99%

Flux-Pinned Dynamics Model Parameterization and Sensitivity Study

Zhu

Peck

Jones-Wilson

2019

Journal of Aerospace Information Systems

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Flux-pinned interfaces maintain a passively stable equilibrium between two spacecraft in close-proximity.Although flux-pinning physics has been studied from a materials-science perspective and at the systems level, the sensitivities and implications of system-level designs on the dynamics need to be better understood, especially in interfaces with multiple magnets and superconductors. These interfaces have highly nonlinear, coupled dynamics that are influenced by physical parameters including strength of magnetic field sources, field-cooled position, and superconductor geometry.Kordyuk's frozen image model successfully approximates the characteristics of flux pinning dynamics but could provide more precise state prediction with the addition of these physical parameter refinements. This paper addresses that gap by offering parametric terms to improve the dynamics model, which may better simulate the behavior of a multiple-magnetmultiple-superconductor interface. The sensitivity of the general flux-pinned dynamics model is studied by varying the physical parameters and simulating the systems level dynamics. This work represents a critical step in the development of a model suited to spacecraft performance verification.

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“…In contrast to classic magnetic bearings, SC magnetic bearings are selfstabilizing due to flux pinning. The levitation forces with densities > 10 N/cm 2 and the stiffness are already limited by the magnetic field strength of the permanent magnet [319,320,321].…”

Section: Among Other Types Of Hts Contacts Intrinsic Josephson Junctmentioning

confidence: 99%

Superconducting Materials — A Topical Overview

Hott¹,

Kleiner

Wolf³

et al.

Frontiers in Superconducting Materials

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Levitation forces of a single-grained Y-Ba-Cu-O bulk superconductor of 48 mm in diameter

Cited by 26 publications

References 6 publications

Size Effects on Levitation Force Between a Magnet and a Superconducting Thin Film in the Meissner State

Size Effects on Levitation Force Between a Magnet and a Superconducting Thin Film in the Meissner State

Flux-Pinned Dynamics Model Parameterization and Sensitivity Study

Superconducting Materials — A Topical Overview

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