Soft magnetic materials

TLDR

The review covers magnetic fundamentals—B‑H loop shape, core loss, anisotropy, annealing, magnetostriction, stress effects—and examines power‑frequency devices, silicon steel, metallic glasses, high‑silicon materials, high‑frequency and pulse applications, recording heads, sensors, and transducers. The authors aim to identify opportunities for further material and processing advances that could enhance magnetic properties and expand novel technology applications. They achieve this by reviewing recent research results and examining core‑loss, magnetization, and stability questions and future directions.

Abstract

The state of art is reviewed with an emphasis on recent research results and a view to identifying areas in which further developments in materials and processing might lead to even better properties and greater application of novel technology. Basis magnetic considerations are discussed, namely, B-H loop shape, core loss, magnetic anisotropy and annealing, and magnetostriction and stress effects. Materials and applications for power frequency devices are examined, covering core loss considerations, silicon steel development, metallic glasses, and high silicon materials. High-frequency and pulse applications, magnetic recording heads, and sensor and transducer applications are also discussed. Basic research questions and future directions with respect to core loss, magnetization, and stability are examined.