Skip to main content
U.S. flag

An official website of the United States government

Official websites use .gov
A .gov website belongs to an official government organization in the United States.

Secure .gov websites use HTTPS
A lock ( ) or https:// means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.

Lengthscale Effects on Exchange Coupling in Co-Pt Ll0+Ll2 Nanochessboards

Published

Author(s)

Eric P. Vetter, Liwei Geng, Priya Ghatwai, Dustin A. Gilbert, Yongmei Jin, William A. Soffa, Jerrold A. Floro

Abstract

The Co-Pt nanochessboard is a quasi-periodic, nanocomposite tiling of Ll0 and Ll2 magnetic phases that offers a novel structure for the investigation of exchange coupling, relevant to permanent magnet applications. Periodicity of the tiling is controlled by the rate of cooling through the eutectoid isotherm, resulting in control over the Ll0-Ll2 exchange coupling. First order reversal curve analysis reveals a transition from two-phase, partial coupled reversal to nearly complete exchange-coupling in a Co40.2Pt59.8 nanochessboard structured alloy as the periodicity is reduced below the critical correlation length. Micromagnetic simulations give insights into how exchange coupling manifests in the tiling, and its impact on microscopic magnetization reversal mechanisms.
Citation
APL Materials
Volume
4
Issue
9

Keywords

High Anisotropy, Composite, CoPt, Interactions, Metallurgy

Citation

Vetter, E. , Geng, L. , Ghatwai, P. , Gilbert, D. , Jin, Y. , Soffa, W. and Floro, J. (2016), Lengthscale Effects on Exchange Coupling in Co-Pt Ll<sub>0</sub>+Ll<sub>2</sub> Nanochessboards, APL Materials, [online], https://tsapps.nist.gov/publication/get_pdf.cfm?pub_id=921358 (Accessed July 20, 2024)

Issues

If you have any questions about this publication or are having problems accessing it, please contact reflib@nist.gov.

Created August 31, 2016, Updated October 12, 2021