Amorphous alloys magnetic properties

Soft magnetic materials are characterized by high permeabiUty and low coercivity. There are sis principal groups of commercially important soft magnetic materials iron and low carbon steels, iron—siUcon alloys, iron—aluminum and iron—aluminum—silicon alloys, nickel—iron alloys, iron-cobalt alloys, and ferrites. In addition, iron-boron-based amorphous soft magnetic alloys are commercially available. Some have properties similar to the best grades of the permalloys whereas others exhibit core losses substantially below those of the oriented siUcon steels. Table 1 summarizes the properties of some of these materials. 

RELATION BETWEEN MAGNETIC PROPERTIES AND THE STRUCTURE OF IRON-BASED AMORPHOUS ALLOYS DETERMINED BY ELECTRON DIFFRACTION... 

We used the common principles of quantitative analysis of additive properties of alloys developed in work [3].The following equation that describes the magnetic effect during the crystallization of the amorphous alloy Fes2Si2Bi6 was got ... 

A. Ye, Yermakov, Ye., Ye., Yurchikov, V.A. Barinov, Magnetic properties of amorphous powders of Y-Co alloys prepared by mechanical alloying, Fiz Metal. MetaUoved. Phys. Met. Metall. USSR), 52(52-56) (1981) 1184-1193. 

The discussion so far assumed that the superimposed uniaxial anisotropy is perfectly uniform. This is rather the exception than the rule in reality, mostly due to internal stresses and/or surface defects. The typical fluctuation wavelengths are much larger than Zex and range from a few to about 100 pm. Such Ku fluctuations ultimately provide the limiting factor for the soft magnetic properties in amorphous and optimized crystalline (conventional or nanocrystalline) alloys. 

Dubovoy A.G., Perekos, A.E., Chuistov K.V. Structure and magnetic properties of small amorphous particles of metallic Fe-151.% alloy. Physics of Metals 1985 6(5) 1085-8. 

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