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High-performance permanent magnets for energy-related applications require a high energy product (BH)max. It has been proposed that the two-phase materials exchange-coupled between magnetically hard and soft phases may greatly enhance the energy products.[1,2] More recently, self-assembly of two-component with hard magnetic phase FePt and soft magnetic phase Fe3Pt nanocomposites has successfully enhanced...
Die upsetting is an effective method to produce bulk anisotropic Nd-Fe-B magnets with nanostructure and full density [1]. A variety of experimental evidence suggests that the grain boundary a play key role in magnetic hardening [2]. Therefore, the grain boundary diffusion method is an effective way to improve the coercivity of die-upset magnet [3, 4]. However, the special role of the grain boundary...
The magnetocaloric effect (MCE) is a thermodynamic phenomenon of magnetic materials, which is subjected to the variation of magnetic field Much effort has been put into developing the magnetocaloric materials over the past years, and a lot of materials with large magnetocaloric effect have been found [1-3], in which Ni-Mn-X (X= In, Sn, Sb, Ga) Heusler alloys attract extensive attention because it...
In this paper, the potential for new device materials and insight into the effects of some of the different iron oxide forms on exchange bias with NiFe (Permalloy) was discussed. The iron-oxides have significantly different magnetic properties. Thin film bilayers were deposited using a dual ion-beam deposition technique that produced an antiferromagnetic iron-oxide layer composition that ranged from...
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