DOMAIN STRUCTURE OF FERROMAGNETIC ζ-PHASE IN Mn-Al SYSTEM

Acta Metall Sin

1964, Vol. 7

Issue (2): 174-178 DOI:

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DOMAIN STRUCTURE OF FERROMAGNETIC ζ-PHASE IN Mn-Al SYSTEM

TSENG HSUN-YI (Institute of Mctallurgy; Academia Sinica)

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TSENG HSUN-YI (Institute of Mctallurgy; Academia Sinica). DOMAIN STRUCTURE OF FERROMAGNETIC ζ-PHASE IN Mn-Al SYSTEM. Acta Metall Sin, 1964, 7(2): 174-178.

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Abstract By means of the Bitter pattern, the domain structure of the ferromagnetic ζ-phase in Mn-Al system was investigated by using polycrystalline specimens. The patterns show either fairly straight lines or wavy and even more complicated forms. No lace-like pattern has been observed, however. Based on the magnetic properties of the phase and on the effects of orientations and sizes of the crystallites, it has been inferred that the ζ-phase has a domain structure typical of uniaxial ferromagnetics with large magnetic anisotropy but owing to the minute size of the crystallite the domain structure is more or less simplified as no spike-in domains are formed. In the pulverized specimen, regions deposited with magnetic powders can be easily observed and they have been tentatively identified as single domain particles.

Received: 18 February 1964

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