Magnetic alloy material and method of making the magnetic...

Details Magnetic alloy material and method of making the magnetic... Magnetic alloy material and method of making the magnetic...

2006-03-30

2009-08-25

Sheehan, John P. (Department: 1793)

Metal treatment

Process of modifying or maintaining internal physical...

Magnetic materials

C419S010000, C419S038000, C148S301000, C075S230000, C075S246000

Reexamination Certificate

active

07578892

ABSTRACT:
A magnetic alloy material according to the present invention has a composition represented by Fe100-a-b-cREaAbCoc, where RE is a rare-earth element always including La, A is either Si or Al, 6 at %≦a≦11 at %, 8 at %≦b≦18 at %, and 0 at %≦c≦9 at %, and has either a two phase structure consisting essentially of an α-Fe phase and an (RE, Fe, A) phase including 30 at % to 90 at % of RE or a three phase structure consisting essentially of the α-Fe phase, the (RE, Fe, A) phase including 30 at % to 90 at % of RE and an RE(Fe, A)13compound phase with an NaZn13-type crystal structure. The respective phases have an average minor-axis size of 40 nm to 2 μm.

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Liu, X.B. “The Structure and large magnetocaloric effect in rapidly quenched LaFe11.4Si1.6 compound.” Journal of Physics: Condensed Matter, vol. 16, 2004, pp. 8043-8051.
Official Communication cited in corresponding UK Patent Application GB 0606428.1, mailed Aug. 3, 2006.

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