Local control of magnetic anisotropy in transcritical permalloy thin films using ferroelectric BaTiO3 domains

Fackler, Sean; Donahue, Michael J.; Gao, Tieren; Nero, Paris Noelle Alexander; Cheong, Sang‐Wook; Cumings, John; Takeuchi, Ichiro

doi:10.1063/1.4902809

Cited by 23 publications

(19 citation statements)

References 41 publications

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“…This experiment shows that different in-plane (a1, a2) and out-of-plane (c) ferroelectric domains have a one-to-one correlation to magnetic domains with varying magnetic uniaxial anisotropy. Similar effects were observed in other ferromagnets: CoFe [72], CoFeB [73,74], Fe [75], La 1-x Sr x MnO-- 3 (LSMO) [76], Ni [77], and NiFe [78]. A key requirement for these observations is strong elastic pinning of magnetic domain walls onto ferroelectric domain walls [79].…”

Section: Controlled Ferroelectric and Multiferroic Domain Architecsupporting

confidence: 70%

Design and Manipulation of Ferroic Domains in Complex Oxide Heterostructures

et al. 2019

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The current burst of device concepts based on nanoscale domain-control in magnetically and electrically ordered systems motivates us to review the recent development in the design of domain engineered oxide heterostructures. The improved ability to design and control advanced ferroic domain architectures came hand in hand with major advances in investigation capacity of nanoscale ferroic states. The new avenues offered by prototypical multiferroic materials, in which electric and magnetic orders coexist, are expanding beyond the canonical low-energy-consuming electrical control of a net magnetization. Domain pattern inversion, for instance, holds promises of increased functionalities. In this review, we first describe the recent development in the creation of controlled ferroelectric and multiferroic domain architectures in thin films and multilayers. We then present techniques for probing the domain state with a particular focus on non-invasive tools allowing the determination of buried ferroic states. Finally, we discuss the switching events and their domain analysis, providing critical insight into the evolution of device concepts involving multiferroic thin films and heterostructures.

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Section: Controlled Ferroelectric and Multiferroic Domain Architecsupporting

confidence: 70%

Design and Manipulation of Ferroic Domains in Complex Oxide Heterostructures

et al. 2019

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“…Our results open up new possibilities for electric field control of magnetic ordering as the size of the superferromagnetic domains can be controlled and reduced by scaling down the size of FE domains by using thin films instead of single crystals 63 .…”

Section: Discussionmentioning

confidence: 92%

Switching on superferromagnetism

Arora

Phillips

Nukala

et al. 2019

Phys. Rev. Materials

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Recent results in electric field control of magnetism have paved the way for the design of new magnetic and spintronic devices with enhanced and novel functionalities and low power consumption. Among the diversity of reported magnetoelectric effects, the possibility of switching on and off long-range ferromagnetic ordering close to room temperature stands out. Its binary character opens up the avenue for its implementation in magnetoelectric data storage devices. Here we show the possibility to locally switch on superferromagnetism in a wedge-shaped polycrystalline FE thin film deposited on top of ferroelectric and ferroelastic BaTiO 3 substrate. A superparamagnetic to superferromagnetic transition is observed for confined regions for which a voltage applied to the ferroelectric substrate induces a sizable strain. We argue that electric field-induced changes of magnetic anisotropy lead to an increase of the critical temperature separating the two regimes so that superparamagnetic regions develop collective long-range superferromagnetic behaviour.

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“…There are three distinct ways to achieve artificial magnetoelectric coupling [5]: via (i) strain, (ii) direct (spin) exchange, and (iii) charge coupling, see section 2. In strain coupled artificial multiferroics, piezoelectric crystal or thin film and magnetostrictive layer are elastically coupled leading to controllable magnetoelastic anisotropy due to propagation of electrostrain [70,[157][158][159][160][161][162][163][164] with a key requirement of strong elastic pinning of magnetic domain walls onto ferroelectric domain walls [165]. In exchange-biased multiferroic composites, the interaction occurs between a ferromagnet and intrinsic multiferroic with uncompensated antiferromagnetic order, such as BiFeO3 [21,98,166,167], YMnO3 [168] and LuMnO3 [118].…”

Section: Domain Imprintmentioning

confidence: 99%

Multiferroic heterostructures for spintronics

Gradauskaite

Meisenheimer

Müller

et al. 2020

Physical Sciences Reviews

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For next-generation technology, magnetic systems are of interest due to the natural ability to store information and, through spin transport, propagate this information for logic functions. Controlling the magnetization state through currents has proven energy inefficient. Multiferroic thin-film heterostructures, combining ferroelectric and ferromagnetic orders, hold promise for energy efficient electronics. The electric field control of magnetic order is expected to reduce energy dissipation by 2–3 orders of magnitude relative to the current state-of-the-art. The coupling between electrical and magnetic orders in multiferroic and magnetoelectric thin-film heterostructures relies on interfacial coupling though magnetic exchange or mechanical strain and the correlation between domains in adjacent functional ferroic layers. We review the recent developments in electrical control of magnetism through artificial magnetoelectric heterostructures, domain imprint, emergent physics and device paradigms for magnetoelectric logic, neuromorphic devices, and hybrid magnetoelectric/spin-current-based applications. Finally, we conclude with a discussion of experiments that probe the crucial dynamics of the magnetoelectric switching and optical tuning of ferroelectric states towards all-optical control of magnetoelectric switching events.

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Local control of magnetic anisotropy in transcritical permalloy thin films using ferroelectric BaTiO3 domains

Cited by 23 publications

References 41 publications

Design and Manipulation of Ferroic Domains in Complex Oxide Heterostructures

Design and Manipulation of Ferroic Domains in Complex Oxide Heterostructures

Switching on superferromagnetism

Multiferroic heterostructures for spintronics

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