A classroom demonstration of levitation and suspension of a superconductor over a magnetic track

Strehlow, Charles P.; Sullivan, M. C.

doi:10.1119/1.3095809

Cited by 8 publications

(3 citation statements)

References 13 publications

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“…Various motions of levitating bodies can be performed by devising the magnetic field distribution. Such interesting motions are not only enjoyable to watch but also have the potential to be used in physics education [11][12][13][14]. In particular, the educational use of superconductors has been actively carried out [15][16][17][18][19][20][21][22].…”

Section: Introductionmentioning

confidence: 99%

Materials for teaching the rotational motion of magnetically levitating bodies with a video camera

Nishiwaki¹,

Takashige²

2023

Eur. J. Phys.

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This study reports analysis of the rotational motion of magnetically levitated superconducting and diamagnetic bodies using video cameras for physics education. The analysis was possible without using special equipment such as a high-speed camera. In this case, the angular velocities of the superconducting and diamagnetic bodies showed linear and exponential decay with time, respectively. Such results can be used as an introduction to solid state physics and as a teaching material for elementary mechanics.

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Section: Introductionmentioning

confidence: 99%

Materials for teaching the rotational motion of magnetically levitating bodies with a video camera

Nishiwaki¹,

Takashige²

2023

Eur. J. Phys.

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“…The value of the critical temperature at which materials have zero electrical resistance varies from one material to another material and it is achieved by cooling the materials with either liquid helium (for low temperature superconductors) or liquid nitrogen (for high temperature superconductors) [3] [4]. [5]. Now it is known that superconductivity occurs in wide variety of materials, including simple elements like aluminum and tin, various metallic alloys, some heavily-doped semiconductors and certain ceramic compounds containing planes of copper and oxygen atoms.…”

Section: Introductionmentioning

confidence: 99%

Superperconductors, Their History and Applications

2019

APTA

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The phenomenon of zero resistance below certain low temperature (critical temperature) leads to limitless current which implies that no dissipation in electrical energy for this occurrence. This property is immediately followed by expulsion of magnetic field from the interior of a material if this material is placed in external magnetic while it is below this low temperature. Materials that have these unique properties when they are below their critical temperature are superconductor materials which were discovered in 1911 by famous Dutch physicist H. K. Onnes. In addition to the above mentioned properties, superconductors have many exceptional positive properties and thus have excellent potentials for applications in every sector. The main problem of these materials is their low temperature which needs refrigerator for their applications elsewhere which is too costly compared to conventional conductors. Even though having room temperature superconductors is still a dream, if it is achieved we can extract energy from these materials with very low cost. In this review history of superconductors, their type and some of their applications have been considered.

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“…Meissner effect, i.e. the expulsion of magnetic field from a superconducting material, has been studied extensively, both from the theoretical and experimental points of view [1][2][3][4][5][6][7][8]. 1 To explain analytically the observed results different methods are used [11,12], which are, for some simple situations, tractable by students.…”

Section: Introductionmentioning

confidence: 99%

Magnetic levitation on a type-I superconductor as a practical demonstration experiment for students

Osorio¹,

Lahera²,

Suderow³

2012

Eur. J. Phys.

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Abstract. We describe and discuss an experimental set-up which allows undergraduate and graduate students to view and study magnetic levitation on a type-I superconductor. The demonstration can be repeated many times using one readily available 25 liter liquid helium dewar. We study the equilibrium position of a magnet that levitates over a lead bowl immersed in a liquid hand-held helium cryostat. We combine the measurement of the position of the magnet with simple analytical calculations. This provides a vivid visualization of magnetic levitation from the balance between pure flux expulsion and gravitation. The experiment contrasts and illustrates the case of magnetic levitation with high temperature type-II superconductors using liquid nitrogen, where levitation results from partial flux expulsion and vortex physics.

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A classroom demonstration of levitation and suspension of a superconductor over a magnetic track

Cited by 8 publications

References 13 publications

Materials for teaching the rotational motion of magnetically levitating bodies with a video camera

Materials for teaching the rotational motion of magnetically levitating bodies with a video camera

Superperconductors, Their History and Applications

Magnetic levitation on a type-I superconductor as a practical demonstration experiment for students

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