Journal ArticleDOI
Modeling of magnetoelastic nanostructures with a fully coupled mechanical-micromagnetic model
Cheng-Yen Liang,Scott Keller,Abdon E. Sepulveda,Alexandre Bur,Wei-Yang Sun,Kyle Wetzlar,Gregory P. Carman +6 more
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TLDR
This paper's fully-coupled approach corresponds the best with the experimental data on coercive field changes, critical for guiding the design process of future nanoscale strain-mediated multiferroic elements, such as those needed in memory systems.Abstract:
Micromagnetic simulations of magnetoelastic nanostructures traditionally rely on either the Stoner-Wohlfarth model or the Landau?Lifshitz-Gilbert (LLG) model, assuming uniform strain (and/or assuming uniform magnetization). While the uniform strain assumption is reasonable when modeling magnetoelastic thin films, this constant strain approach becomes increasingly inaccurate for smaller in-plane nanoscale structures. This paper presents analytical work intended to significantly improve the simulation of finite structures by fully coupling the LLG model with elastodynamics, i.e., the partial differential equations are intrinsically coupled. The coupled equations developed in this manuscript, along with the Stoner-Wohlfarth model and the LLG (constant strain) model are compared to experimental data on nickel nanostructures. The nickel nanostructures are 100???300???35 nm single domain elements that are fabricated on a Si/SiO2 substrate; these nanostructures are mechanically strained when they experience an applied magnetic field, which is used to generate M vs H curves. Results reveal that this paper?s fully-coupled approach corresponds the best with the experimental data on coercive field changes. This more sophisticated modeling technique is critical for guiding the design process of future nanoscale strain-mediated multiferroic elements, such as those needed in memory systems.read more
Citations
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Journal ArticleDOI
Multiferroic Heterostructures Integrating Ferroelectric and Magnetic Materials.
TL;DR: The most recent progresses in the fundamental principles and potential applications of the interface-based magnetoelectric effect in multiferroic heterostructures are summarized, and perspectives on some key issues that require further study are presented in order to realize their practical device applications.
Journal ArticleDOI
Electrically Driven Magnetic Domain Wall Rotation in Multiferroic Heterostructures to Manipulate Suspended On-Chip Magnetic Particles
Hyunmin Sohn,Mark E. Nowakowski,Cheng-Yen Liang,Joshua L. Hockel,Kyle Wetzlar,Scott Keller,Brenda McLellan,Matthew A. Marcus,Andrew Doran,Anthony Young,Mathias Kläui,Gregory P. Carman,Jeffrey Bokor,Rob N. Candler +13 more
TL;DR: Deterministic electrically driven, strain-mediated domain wall (DW) rotation in ferromagnetic Ni rings fabricated on piezoelectric substrates is experimentally demonstrated to demonstrate a proof-of-concept energy-efficient pathway for multiferroic-based lab-on-a-chip applications.
Journal ArticleDOI
Direct imaging of delayed magneto-dynamic modes induced by surface acoustic waves
Michael Foerster,Ferran Macià,Ferran Macià,Nahuel Statuto,Nahuel Statuto,Simone Finizio,Simone Finizio,Alberto Hernández-Mínguez,Sergi Lendinez,Paulo V. Santos,Josep Fontcuberta,Joan Manel Hernàndez,Mathias Kläui,Lucia Aballe +13 more
TL;DR: Foerster et al. as mentioned in this paper studied the effect of dynamic strain accompanying a surface acoustic wave on magnetic nanostructures in thermal equilibrium and showed that magnetization modes have a delayed response to the strain modes, adjustable by the magnetic domain configuration.
Journal ArticleDOI
Generation of localized strain in a thin film piezoelectric to control individual magnetoelectric heterostructures
Jizhai Cui,Cheng-Yen Liang,Elizabeth A. Paisley,Abdon E. Sepulveda,Jon F. Ihlefeld,Gregory P. Carman,Christopher S. Lynch +6 more
TL;DR: In this article, a surface electrode pattern was designed to produce sufficient in-plane strain in a PbZr0.52Ti0.48O3 (PZT) thin film clamped by a Si substrate to control magnetism in a 1000nm diameter Ni ring.
Journal ArticleDOI
Strain-mediated 180° switching in CoFeB and Terfenol-D nanodots with perpendicular magnetic anisotropy
Qianchang Wang,Xu Li,Cheng-Yen Liang,Anthony Barra,John P. Domann,Christopher S. Lynch,Abdon E. Sepulveda,Greg P. Carman +7 more
TL;DR: In this article, a micromagnetic and elastodynamic finite element model is used to compare the 180° out-of-plane magnetic switching behavior of CoFeB and Terfenol-D nanodots with perpendicular magnetic easy axes.
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