adiabatic demagnetization

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Adiabatic demagnetization

The removal or diminution of a magnetic field applied to a magnetic substance when the latter has been thermally isolated from its surroundings. The process concerns paramagnetic substances almost exclusively, in which case a drop in temperature of the working substance is produced (magnetic cooling). See Paramagnetism

Nuclear magnetic moments are one or two thousand times smaller than their ionic (that is, electronic) counterparts, and the characteristic temperature of their mutual interaction lies in the microkelvin rather than millikelvin region. Successful experiments in nuclear adiabatic demagnetization date from the mid-1950s. See Absolute zero, Cryogenics, Low-temperature physics

adiabatic demagnetization

[¦ad·ē·ə¦bad·ik ‚de‚mag·nəd·ə′zā·shən]
(cryogenics)
A method of cooling paramagnetic salts to temperatures of 10-3K; the sample is cooled to the boiling point of helium in a strong magnetic field, thermally isolated, and then removed from the field to demagnetize it. Also known as Giaque-Debye method; magnetic cooling; paramagnetic cooling.
References in periodicals archive ?
Introduction Magnetic refrigeration is a newly developed and emerging cooling technique which is based on magneto-caloric effect of magnetic materials to produce cooling/heating.
MagFree-a project conducted by Cooltech Applications, a French company founded in 2003 and the first in the world to industrialize a magnetic refrigeration system (MRS)--aims to replace F-Gas-based compressors for the refrigeration and air conditioning markets.
In the past few decades, a large number of experimental and numerical studies of magnetic refrigeration devices near room temperature have been published, either in a magnetic refrigeration system or in magnetocaloric materials [1-9].
ClickPress, Mon Aug 24 2015] Magnetic Refrigeration Market by Product (Refrigeration, Air conditioning, Heat pumps), Application (Domestic, Commercial, Transportation & Industrial) & Geography - Global forecast to 2022
Magnetic refrigeration and heating are environmentally friendly emerging technologies with a realistic potential to replace the conventional vapour- compression refrigeration (Yu et al.
Cooltech s Magnetic Refrigeration System will be able to replace gas based compressors on markets like commercial and industrial refrigeration, transportation, storage, air conditioning and later on, domestic refrigeration products.
11 ( ANI ): Researchers are reportedly working on magnetic refrigeration technology that could make the need for compressors obsolete.
In contrast, magnetic refrigeration is a remarkable technology that does not use these refrigerants.
Ito: A study on the fundamental heat transport potential of an in vehicle magnetic refrigerator, Fifth IIF-IIR International Conference on Magnetic Refrigeration at Room Temperature, Thermag V Grenoble, France, 17-20 September 2012.
Abdelwaheb Cheikh Rouhou, chairman of the Tunisian Materials Research Association, pointed out that the four-day gathering will provide the opportunity to present findings of the last scientific research related to transport of electrical energy and magnetic refrigeration.
Magnetic refrigeration (MR) becomes a promising competitive technology to the conventional gas-compression/expansion [1, 2].
Cobalt titanate nanopowder has applications in high-density data storage, magnetic resonance imaging, magnetic refrigeration, and color processing.

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