Lengthscale effects on exchange coupling in Co-Pt L10 + L12 nanochessboards | Zendy

Eric Vetter | Zendy; Liwei D. Geng | Zendy; Priya Ghatwai | Zendy; Dustin A. Gilbert | Zendy; Yongmei M. Jin | Zendy; W.A. Soffa | Zendy; Jerrold A. Floro | Zendy

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Lengthscale effects on exchange coupling in Co-Pt L10 + L12 nanochessboards

Author(s) -

Eric Vetter,

Liwei D. Geng,

Priya Ghatwai,

Dustin A. Gilbert,

Yongmei M. Jin,

W.A. Soffa,

Jerrold A. Floro

Publication year - 2016

Publication title -

apl materials

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 1.571

H-Index - 60

ISSN - 2166-532X

DOI - 10.1063/1.4962187

Subject(s) - coupling (piping) , materials science , eutectic system , condensed matter physics , alloy , micromagnetics , magnetization , metallurgy , physics , magnetic field , quantum mechanics

The Co-Pt nanochessboard is a quasi-periodic, nanocomposite tiling of L10 and L12 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 L10-L12 exchange coupling. First order reversal curve analysis reveals a transition from partial coupling 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

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