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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 How to thank TFD for its existence? Tell a friend about us, add a link to this page, add the site to iGoogle, or visit webmaster's page for free fun content. |
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| The field of magnetic refrigeration has progressed rapidly in recent years. The tractor cab of the future just might be cooled by a magnetic refrigeration system. demonstrated a magnetic refrigeration unit that operated at room temperature (SN: 3/28/98, p. |
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