Magnetic properties, thermal stability, and structure of the nanocrystalline soft magnetic (Fe sub(0.7)Co sub(0.3)) sub(88)Hf sub(2)W sub(2)M o sub(2)Zr sub(1)B sub(4)Cu sub(1) alloy with induced magnetic anisotropy

• Published in: Physics of metals and metallography 2014-04, Vol.115 (4), p.326-334
• Main Authors: Dmitrieva, N V, Lukshina, V A, Volkova, E G, Potapov, AP, Fillipov, B N, Shishkin, DA
• Format: Article
• Language: English
• Subjects: Alloying additive; Annealing; Induced magnetic anisotropy; Magnetic properties; Magnetization; Nanocrystals; Tensile stress; Thermal stability
• ISSN: 0031-918X; 1555-6190
• DOI: 10.1134/S0031918X14040061

The effect of magnitude of tensile stresses ( sigma ) applied to the (Fe sub(0.7)Co sub(0.3)) sub(88)Hf sub(2)W sub(2)M o sub(2)Zr sub(1)B sub(4)Cu sub(1) alloy with refractory-metal additions during its nanocrystallization at 620 degree C for 20 min on the magnetic properties, structure, and thermal stability of the alloy is studied. It has been found that, during the nanocrystallization of the alloy under the effect of tensile stresses of 6-250 MPa, longitudinal magnetic anisotropy with an easy magnetization axis parallel to the long size of ribbon is induced in the alloy. The thermal stability of magnetic properties of the alloy under study has been shown to be determined by the thermal stability of induced magnetic anisotropy and to depend on the magnitude of tensile stresses applied during nanocrystallizing annealing (NA). The better thermal stability of magnetic properties has been observed for the alloy subjected to NA at sigma = 170 MPa. After annealing at 570 degree C for 25 h, the magnetic properties of the alloy are unchanged.