Chemistry and Physics Faculty Articles

Title

Ligand Passivated Core−Shell FePt@Co Nanomagnets Exhibiting Enhanced Energy Product

Document Type

Article

Publication Date

8-29-2016

Publication Title

Chemistry of Materials

ISSN

0897-4756

Volume

28

Issue/No.

15

First Page

5480

Last Page

5487

Abstract

Systematic growth of a soft-magnet Co shell (0.6 to 2.7 nm thick) around a hard-magnet Fe0.65Pt0.35 core (5 nm in diameter) has been achieved in a one-pot microwave synthesis. This controlled growth led to a 4-fold enhancement in the energy product of the core–shell assembly as compared to the energy product of bare Fe0.65Pt0.35 nanoparticles. The simultaneous enhancement of coercivity and saturation moment reflects the onset of theoretically predicted exchange-spring behavior. The demonstration of nanoscale exchange-spring magnets can lead to improved high-performance magnet design for energy applications.

Comments

©2016 American Chemical Society

Additional Comments

NSF grant #: DMR-1507233; NSF Cooperative Agreement #: DMR-1157490

DOI

10.1021/acs.chemmater.6b02062

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