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This Letter presents the oscillatory behavior found in the magnetic entropy change of diamagnetic materials. We show that this quantity depends on the oscillating term and, as a consequence, the magnetocaloric potential can be tuned as either inverse or normal, depending on the value of the magnetic field change. A quite small change (approximate to 10(-3) T) of the magnetic field change is able to invert the magnetic entropy change. These results open doors for applications at quite low temperatures and can be further developed to be incorporated into adiabatic demagnetization refrigerators, as well as sensible magnetic field sensors. (C) 2011 American Institute of Physics. [doi:10.1063/1.3615296]
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3.6
论文数:
10.4W
被引数:
17.8W
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