Available Technology

DOPED GD5GE2SI2 COMPOUNDS AND METHODS FOR REDUCING HYSTERESIS LOSSES IN GD5GE2SI2 COMPOUND

A Gd.sub.5Ge.sub.2Si.sub.2 refrigerant compound is doped or alloyed with an effective amount of silicide-forming metal element such that the magnetic hysteresis losses in the doped Gd.sub.5Ge.sub.2Si.sub.2 compound are substantially reduced in comparison to the hysteresis losses of the undoped Gd.sub.5Ge.sub.2Si.sub.2 compound. The hysteresis losses can be nearly eliminated by doping the Gd.sub.5Ge.sub.2Si.sub.2 compound with iron, cobalt, manganese, copper, or gallium. The effective refrigeration capacities of the doped Gd.sub.5Ge.sub.2Si.sub.2 compound are significantly higher than for the undoped Gd.sub.5Ge.sub.2Si.sub.2 compound.
Inventors: 
Virgil Provenzano, Alexander Shapiro, Robert Shull
Patent Number: 
7,651,574
Internal Laboratory Ref #: 
04-017US
Phone: 
301-975-2573
Email: 
tpo@nist.gov
Lab Representatives
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