Coercivity and Magnetic Anisotropy of (Fe0.76Si0.09B0.10P0.05)97.5Nb2.0Cu0.5 Amorphous and Nanocrystalline Alloy Produced by Gas Atomization Process

Kenny L Alvarez; José Manuel Martín; Nerea Burgos; Mihail Ipatov; Lourdes Domínguez; Julián González

doi:10.3390/nano10050884

Coercivity and Magnetic Anisotropy of (Fe_0.76Si_0.09B_0.10P_0.05)_97.5Nb_2.0Cu_0.5 Amorphous and Nanocrystalline Alloy Produced by Gas Atomization Process

Nanomaterials (Basel). 2020 May 4;10(5):884. doi: 10.3390/nano10050884.

Authors

Kenny L Alvarez^{1

2}, José Manuel Martín¹, Nerea Burgos¹, Mihail Ipatov³, Lourdes Domínguez⁴, Julián González⁵

Affiliations

¹ CEIT-IK4 and Tecnun (University of Navarra), P. de Manuel Lardizábal 15, 20018 San Sebastián, Spain.
² Escuela de Ingeniería Mecánica, Pontificia Universidad Católica de Valparaíso, Av. Brasil 2950, Valparaíso, Chile.
³ SGIker (Magnetic Measurements), University of the Basque Country, Av. Tolosa 72, 20018 San Sebastián, Spain.
⁴ Department of Applied Physics I, Engineering School, University of the Basque Country, Plaza Europa s/n, 20018 San Sebastián, Spain.
⁵ Department of Materials Physics, Faculty of Chemistry, University of the Basque Country, P. de Manuel Lardizabal 3, 20018 San Sebastián, Spain.

Abstract

We present the evolution of magnetic anisotropy obtained from the magnetization curve of (Fe_0.76Si_0.09B_0.10P_0.05)_97.5Nb_2.0Cu_0.5 amorphous and nanocrystalline alloy produced by a gas atomization process. The material obtained by this process is a powder exhibiting amorphous character in the as-atomized state. Heat treatment at 480 °C provokes structural relaxation, while annealing the powder at 530 °C for 30 and 60 min develops a fine nanocrystalline structure. Magnetic anisotropy distribution is explained by considering dipolar effects and the modified random anisotropy model.

Keywords: amorphous and nanocrystalline materials; anisotropy field; gas atomization; magnetic characterization; soft magnetic materials.