Magnetostatic Interactions in Self-Assembled CoxNi1–xFe2O4/BiFeO3 Multiferroic Nanocomposites
| Autor: | Shuchi Ojha, Caroline A. Ross, Nicolas M. Aimon, Wallace C. Nunes |
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| Rok vydání: | 2016 |
| Předmět: |
010302 applied physics
Nanocomposite Materials science Condensed matter physics General Engineering General Physics and Astronomy 02 engineering and technology 021001 nanoscience & nanotechnology Magnetocrystalline anisotropy 01 natural sciences Ferroelectricity k-nearest neighbors algorithm 0103 physical sciences General Materials Science Ising model Multiferroics 0210 nano-technology Ground state Antiparallel (electronics) |
| Zdroj: | ACS Nano. 10:7657-7664 |
| ISSN: | 1936-086X 1936-0851 |
| DOI: | 10.1021/acsnano.6b02985 |
| Popis: | 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. |
| Databáze: | OpenAIRE |
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