Better magnetic refrigeration. (magnetocaloric effect, magnetic field that causes cooling; composite made of gadolinium, gallium, iron and oxygen causes cooling at higher temperatures) (Brief Article) From: Science News | Date: April 23, 1994| Author: Lipkin, Richard | COPYRIGHT 1994 Science Service, Inc. This material is published under license from the publisher through the Gale Group, Farmington Hills, Michigan.  All inquiries regarding rights should be directed to the Gale Group.Copyright information

In some materials, a magnetic field can cause cooling.

Scientists have known about this phenomenon, the magnetocaloric effect, since the turn of the century, when the technique was first used to cool liquid oxygen.

In essence, the effect works like this: Exposing a substance to a magnetic field causes its atoms to point in the same direction. When that magnetic field is taken away, the atoms rotate randomly. This change creates a cooling effect.

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