Magnetostatic Interactions in Self-Assembled CoxNi1–xFe2O4/BiFeO3 Multiferroic Nanocomposites
Source abstract
Abstract
Self-assembled vertically aligned oxide nanocomposites consisting of magnetic pillars embedded in a ferroelectric matrix have been proposed for logic devices made from arrays of magnetostatically interacting pillars. To control the ratio between the nearest neighbor interaction field and the switching field of the pillars, the pillar composition CoxNi1-xFe2O4 was varied over the range 0 ≤ x ≤ 1, which alters the magnetoelastic and magnetocrystalline anisotropy and the saturation magnetization. Nanocomposites were templated into square arrays of pillars in which the formation of a "checkerboard" ground state after ac-demagnetization indicated dominant magnetostatic interactions. The effect of switching field distribution in disrupting the antiparallel nearest neighbor configuration was analyzed using an Ising model and compared with experimental results.
Source: openalex_inverted_index · Quality: baseline
Research context
OpenAlex topics: Multiferroics and related materials · Ferroelectric and Piezoelectric Materials · Advanced Condensed Matter Physics
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
Department of Materials Science and Engineering, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, United States
Funding
Defense Advanced Research Projects Agency · Conselho Nacional de Desenvolvimento Científico e Tecnológico · Microelectronics Advanced Research Corporation · National Science Foundation
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