Enhanced magnetocaloric effect material

Details Enhanced magnetocaloric effect material Enhanced magnetocaloric effect material

2006-07-18

2006-07-18

Doerrler, William C. (Department: 3744)

Refrigeration

Using electrical or magnetic effect

C252S067000, C252S062550, C075S246000

Reexamination Certificate

active

07076959

ABSTRACT:
A magnetocaloric effect heterostructure having a core layer of a magnetostructural material with a giant magnetocaloric effect having a magnetic transition temperature equal to or greater than 150 K, and a constricting material layer coated on at least one surface of the magnetocaloric material core layer. The constricting material layer may enhance the magnetocaloric effect by restriction of volume changes of the core layer during application of a magnetic field to the heterostructure. A magnetocaloric effect heterostructure powder comprising a plurality of core particles of a magnetostructural material with a giant magnetocaloric effect having a magnetic transition temperature equal to or greater than 150 K, wherein each of the core particles is encapsulated within a coating of a constricting material is also disclosed. A method for enhancing the magnetocaloric effect within a giant magnetocaloric material including the step of coating a surface of the magnetocaloric material with a constricting material is disclosed.

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