Voltage induced artificial ferromagnetic-antiferromagnetic ordering in synthetic multiferroics
| Autor: | Wei-Yang Sun, Andres C. Chavez, Gregory P. Carman, Kang L. Wang, Jayasimha Atulasimha |
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| Rok vydání: | 2017 |
| Předmět: |
010302 applied physics
Materials science Condensed matter physics General Physics and Astronomy 02 engineering and technology 021001 nanoscience & nanotechnology 01 natural sciences Piezoelectricity Condensed Matter::Materials Science Magnetization Magnetic anisotropy Ferromagnetism 0103 physical sciences Antiferromagnetism Multiferroics Nanodot 0210 nano-technology Antiparallel (electronics) |
| Zdroj: | Journal of Applied Physics. 122:224102 |
| ISSN: | 1089-7550 0021-8979 |
| Popis: | This paper presents numerical and experimental data for dipole-dipole coupled Ni nanodots on a piezoelectric [Pb(Mg1/3Nb2/3)O3]0.68[PbTiO3]0.32 substrate. Simulation results show that the dipole coupling produces artificial ferromagnetic (parallel magnetization alignment in the nanodot arrays) behavior that can be modified to artificial antiferromagnetic behavior with an applied voltage. Experimental results show the trends in Mr and Hc predicted by the model, but discrepancies arise due to geometric defects present in the fabricated samples. Geometric defects are introduced into the Ni nanodot models, thus dramatically improving the correlation between experiments and analysis. This work shows, through numerical simulations, that artificial multiferroic nanostructures can be designed to produce switching from parallel (artificial ferromagnetic) to antiparallel (artificial antiferromagnetic) magnetization ordering by leveraging dipole coupling with voltage induced changes in magnetic anisotropy. |
| Databáze: | OpenAIRE |
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