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2015 ; 5
(ä): 10822
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Separating read and write units in multiferroic devices
#MMPMID26086736
Roy K
Sci Rep
2015[Jun]; 5
(ä): 10822
PMID26086736
show ga
Strain-mediated multiferroic composites, i.e., piezoelectric-magnetostrictive
heterostructures, hold profound promise for energy-efficient computing in beyond
Moore's law era. While reading a bit of information stored in the
magnetostrictive nanomagnets using a magnetic tunnel junction (MTJ), a material
selection issue crops up since magnetostrictive materials in general cannot be
utilized as the free layer of the MTJ. This is an important issue since we need
to achieve a high magnetoresistance for technological applications. We show here
that magnetically coupling the magnetostrictive nanomagnet and the free layer
e.g., utilizing the magnetic dipole coupling between them can circumvent this
issue. By solving stochastic Landau-Lifshitz-Gilbert equation of magnetization
dynamics in the presence of room-temperature thermal fluctuations, we show that
such design can eventually lead to a superior energy-delay product.