期刊
JOURNAL OF APPLIED PHYSICS
卷 122, 期 22, 页码 -出版社
AMER INST PHYSICS
DOI: 10.1063/1.4997612
关键词
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资金
- NSF [CCF Career 1253370, ECCS 1609303]
- FAME, one of the six centers of STARnet, a Semiconductor Research Corporation - MARCO
- DARPA
- NSF Nanosystems Engineering Research Center for the Translational Applications of Nanoscale Multiferroic Systems (TANMS) [EEC-1160504]
- Division of Computing and Communication Foundations
- Direct For Computer & Info Scie & Enginr [1253370] Funding Source: National Science Foundation
- Div Of Electrical, Commun & Cyber Sys
- Directorate For Engineering [1609303] Funding Source: National Science Foundation
This paper presents numerical and experimental data for dipole-dipole coupled Ni nanodots on a piezoelectric [Pb(Mg1/3Nb2/3)O-3](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 M-r and H-c 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. Published by AIP Publishing.
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