Magnetic Properties of Amorphous Fe-Pd-B and Fe-Pt-B Alloys

Abstract

The magnetic properties of amorphous Fe-Pd-B and Fe-Pt-B alloys are presented. The basis of our research were DTMD-DTA (derivative thermo-magnetogravimetry and differential thermal analysis) measurements, magnetic saturation measurements and low, ac field hysteresis loop measurements. The changes in the magnetic moment, Curie and crystallization temperature when Pt and Pd atoms substitute for Fe atoms are discussed. The most significant features of the hysteresis loop, such as the initial and maximum permeability, the saturation and remanence induction, the coercivity and the losses are presented.

Preparation of Fe–Pt–Si Amorphous Ribbons and Their Coercivity after Crystallization

“…1. [3][4][5][6][8][9][10][11][12][13] In Fig. 1 , the amorphous-forming ability of the alloys becomes low, and it seems difficult to obtain an amorphous phase for near equiatomic Fe-Pt alloys with a B content higher than 20 at%, as determined from Fig.…”

Magnetic properties of metallic glasses of the type Fe80−x Pd x B20 and Fe80−x Pt x B20

“…We continue our previous studies of theses materials [1,2] which are also interesting for others and have been measured with Si instead of B in [3,4] and with low Fe concentration in [3] in which there is expected an effect of "giant magnetic moment" (like 12 μ B per Fe atom for about 0.28 at. % Fe in Pd).…”

“…Curie temperature for Pd alloys has a maximum at x=4 with T C =753 K, which supports enforcing influence of Pd at low concentrations of Pd for magnetic interactions. On the other hand calculated average magnetic moment per Fe atom in Fe 80−x Pd x B 20 (see Table I) has an maximum at [1] (and the difference may stem from fabrication conditions). The increase of this value for higher Pd concentrations is evidently due to Pd magnetic moments of 4 day shells which interact with Fe magnetic moments and enlarge average value.…”