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1 Journal of Technical Physics

1 2002

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Partially devitrified metallic glasses

Lachowicz H. K., Zaveta K., Ślawska-Waniewska A.

Journal of Technical Physics

2002

Vol. 43, no 4

527-542

The paper presents a review of selected experiments which have been carried out using partially devitrified Fe- and Co-based metallic glasses as the research objects. It is shown that by a suitable choice of the composition of the metallic glass and also by the conditions of annealing, a variety of magnetic phases can be created in these systems. It is also shown that by controlled processes of annealing, the coercivity of metallic glass can be altered by several orders of magnitude, giving a possibility to produce materials with the extremely soft magnetic properties, up to the magnetically semi-hard ones. The magnetostriction of nanocrystalline materials of the FINEMET-type is discussed as well, showing that the size-dependent phenomena and the symmetry restriction at the particle boundaries create the surface contribution to the effective magnetostriction. Finally, the magnetic interactions between particles in partially devitrified samples are considered and the observed effects of temperature and hydrostatic pressure discussed.