Micromagnetic Simulations for Coercivity Improvement through Nano-Structuring of Rare-Earth Free L1${}_0$-FeNi Magnets

Abstract

In this work we investigate the potential of tetragonal L1${}_0$ ordered FeNi as candidate phase for rare earth free permanent magnets taking into account anisotropy values from recently synthesized, partially ordered FeNi thin films. In particular, we estimate the maximum energy product ($BH$)${}_{\max }$ of L1${}_0$-FeNi nanostructures using micromagnetic simulations. The maximum energy product is limited due to the small coercive field of partially ordered L1${}_0$-FeNi. Nano-structured magnets consisting of 128 equi-axed, platelet-like and columnar-shaped grains show a theoretical maximum energy product of 228 kJ/m${}^3$, 208 kJ/m${}^3$, 252 kJ/m${}^3$, respectively.

References in corpus (2)

• Electronic structure and magnetic properties of L1_0 binary alloys
• Origin of perpendicular magneto-crystalline anisotropy in L10-FeNi under tetragonal distortion

Cited by in corpus (4)

• Micromagnetics of rare-earth efficient permanent magnets
• Magnetic anisotropy of L1${}_0$ FeNi (001), (010), and (111) ultrathin films: A first-principles study
• Micromagnetic modelling of nanorods array-based L10-FeNi/SmCo5 exchange-coupled composites
• Experimental and micromagnetic investigation of texture influence on magnetic properties of anisotropic Co/Co3O4 exchange-bias composites