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Making a Bigger Chill With Magnets

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Science  27 Mar 1998:
Vol. 279, Issue 5359, pp. 2045
DOI: 10.1126/science.279.5359.2045

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LOS ANGELES --Powerful magnets could one day be the key to keeping food cold in so-called magnetocaloric refrigerators, which would be much more energy efficient and less polluting than standard models. A new class of magnetocaloric materials, announced here last week at a meeting of the American Physical Society, can chill two to six times further in a single magnetic cycle, meaning that the refrigerators could operate with weaker magnetic fields or less material.