Results 251 to 260 of about 8,638 (296)

Investigating refrigerator magnets

The Physics Teacher, 2000
Two articles recently carried in The Physics Teacher have included discussions of “refrigerator magnets.” These articles have been informative, and I would like to add the simple analogy of a horseshoe magnet to the discussion. After all, a horseshoe magnet is a “one-sided” magnet in that it has the effective part of its field only on the end where the
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Thermodynamics of magnetic refrigeration

International Journal of Refrigeration, 2006
A comprehensive treatment of the thermodynamics of cyclic magnetic refrigeration processes is presented. It starts with a review of the work, heat and internal energy of a magnetized specimen in a magnetic field, and a list of the thermodynamic potentials is given. These are based on the very recent discovery of an alternative Kelvin force. It is shown
Andrej Kitanovski, Peter W. Egolf
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Nanocomposites For magnetic Refrigeration

MRS Proceedings, 1992
ABSTRACTUpon the application of an external magnetic field, the magnetic spins in a material partially align with the field, thereby reducing the magnetic entropy of the spin system. When performed adiabatically, the specimen's temperature will rise.
R.D. Shull, R.D. Mcmichael, J.J. Ritter, L.H. Bennett   +3 more
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Magnetic refrigeration—towards room-temperature applications

Physica B: Condensed Matter, 2003
Modern society relies very much on readily available cooling. Magnetic refrigeration based on the magneto-caloric effect (MCE) has become a promising competitive technology for the conventional gas-compression/expansion technique in use today. Recently, there have been two breakthroughs in magnetic-refrigeration research: one is that American ...
Brück, E., Tegus, O., Li, X.W., de Boer, F.R., Buschow, K.H.J.   +4 more
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Coordination‐Cluster‐Based Molecular Magnetic Refrigerants

The Chemical Record, 2016
AbstractCoordination polymers serving as molecular magnetic refrigerants have been attracting great interest. In particular, coordination cluster compounds that demonstrate their apparent advantages on cryogenic magnetic refrigerants have attracted more attention in the last five years.
Shaowei, Zhang, Peng, Cheng
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New application of complex magnetic materials to the magnetic refrigerant in an Ericsson magnetic refrigerator

Journal of Applied Physics, 1987
A complex new magnetic refrigerant, suitable for the ideal Ericsson cycle, has been investigated. Above ∼15 K it is necessary to use ferromagnets as a magnetic refrigerant. However, temperature variation for the magnetic entropy change in a homogeneous ferromagnet is not suitable for the Ericsson cycle.
T. Hashimoto, T. Kuzuhara, M. Sahashi, K. Inomata, A. Tomokiyo, H. Yayama   +5 more
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Magnetic refrigerator–heat pump

Physics Today, 1979
For almost half a century low-temperature physicists have been exploiting the adiabatic demagnetization of paramagnetic materials to achieve temperatures near absolute zero. Until recently the potential utility of the magnetic cycle for refrigeration and heat pumping near room temperature has not been taken seriously for two reasons: First of all, the ...
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Room-temperature magnetic refrigerator using permanent magnets

IEEE Transactions on Magnetics, 2000
A magnetic refrigerator device based on adiabatic magnetic refrigeration is described. The magnetic material is cyclically magnetized and demagnetized by permanent magnets in an adiabatic process. A temperature difference of 1.6 K between the hot and cold regions was obtained under a low magnetic field (0.3 T). Gadolinium was the magnetic material used
X. Bohigas, E. Molins, A. Roig, J. Tejada, X.X. Zhang   +4 more
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MAGNETIC REFRIGERATOR

Proceedings of the 26th International Congress of Mechanical Engineering, 2021
Edigar Botelho, Julio Tedesco, Lucas Venancio Pires de Carvalho Lima   +2 more
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Recent Investigations on Refrigerants for Magnetic Refrigerators

1986
In development of the magnetic refrigerator, an important problem is selection of magnetic materials as refrigerants. The main purpose of the present paper is to discuss the magnetic and thermal properties necessary for these refrigerants and to report recent investigations.
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