Cooling by adiabatic magnetization of superconductors

Yaqub, M.

doi:10.1016/s0011-2275(60)80012-4

Cited by 22 publications

(16 citation statements)

References 11 publications

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“…tin samples [6,11], from 1.43 K to 1.32 K on thallium samples, and from 3.63 K to 3.54 K on lead spheres [10]. It thus never became of practical use as a cryogenic technique, and its theoretical modeling has also been overlooked.…”

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confidence: 99%

Adiabatic magnetization of superconductors as a high-performance cooling mechanism

Dolcini

Giazotto

2009

Phys. Rev. B

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The adiabatic magnetization of a superconductor is a cooling principle proposed in the 1930s, which has remained mostly unexploited so far. Here we present a detailed dynamic description of the effect, computing the achievable final temperatures as well as the process time scales for different superconductors in various regimes. We show that, although in the experimental conditions explored so far the method is in fact inefficient, a suitable choice of initial temperatures and metals can lead to unexpectedly large cooling effect, even in the presence of dissipative phenomena. Our results suggest that this principle can be re-envisaged today as a performing refrigeration method to access the K regime.

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confidence: 99%

Adiabatic magnetization of superconductors as a high-performance cooling mechanism

Dolcini

Giazotto

2009

Phys. Rev. B

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“…It is well established that an adiabatic phase transition of a Type I superconductor at finite temperature involves the latent heat evolution being supplied (superconductive phase to normal phase) or absorbed (normal phase to superconductive phase) by the normal regime (the lattice and normal conduction electrons) of the superconductor [4].…”

Section: Redisigning the Conventional Process Cyclementioning

confidence: 99%

Superconductor Particles As The Working Media Of A Heat Engine

Keefe¹

2011

AIP Conference Proceedings

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“…If a thermally isolated bulk-dimensioned specimen having a cross-section Dg, defined by DB >> {( T), is driven normal at a finite temperature by application of a magnetic field, self-cooling will occur because of the difference in entropy between the superconductive and normal phases [9]. T h e final temperature TFB attained for a magnetocaloric effect adiabatic phase transition of a bulk-dimensioned specimen,…”

Section: Description Of the Magneto-caloric Effect Adiabatic Phase Trmentioning

confidence: 99%

“…The magnetocaloric effect adiabatic phase transition of a bulk-dimensioned specimen is isentropic [9], involving the appearance of a mixture of superconductive and normal phases [8] in which the path in field-temperature (H-T) space is along the Tuyn (critical field) curve:…”

Section: Description Of the Magneto-caloric Effect Adiabatic Phase Trmentioning

confidence: 99%

Second law implications of a magnetocaloric effect adiabatic phase transition of type I superconductor particles

Keefe¹

2004

Journal of Modern Optics

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The nature of the thermodynamic behaviour of type I superconductor particles having a cross-section less than the Ginzburg-Landau temperature dependent coherence length t( T ) is discussed for a magnetic field-induced adiabatic phase transition from the superconductive state to the normal state. The magnetocaloric effect adiabatic phase transition of a particledimensioned specimen is characterized by a decrease in entropy, suggesting a quantum limit to traditional formulations of the second law, evidenced by attainment of a final process temperature below that resulting from the isentropic magnetocaloric effect adiabatic phase transition of a bulk dimensioned specimen. Journal of Modern Optics

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Cooling by adiabatic magnetization of superconductors

Cited by 22 publications

References 11 publications

Adiabatic magnetization of superconductors as a high-performance cooling mechanism

Adiabatic magnetization of superconductors as a high-performance cooling mechanism

Superconductor Particles As The Working Media Of A Heat Engine

Second law implications of a magnetocaloric effect adiabatic phase transition of type I superconductor particles

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