Self-biased magnetoelectric switching at room temperature in three-phase ferroelectric–antiferromagnetic–ferrimagnetic nanocomposites

Wu, Rui; Zhang, Di; Maity, Tuhin; Lu, Ping; Yang, Jie; Gao, Xu; Zhao, Shirong; Wei, Xiucheng; Zeng, Hao; Kuršumović, A.; Тиан, Ганг; Li, Weiwei; Cui, Yun; Wang, Yongqiang; Ren, Zhongkai; Zhou, Ziyao; Liu, Ming; Zhang, Kelvin H. L.; Jia, Q. X.; Yang, Jinbo; Wang, Haiyan; MacManus‐Driscoll, Judith L.

doi:10.1038/s41928-021-00584-y

Cited by 20 publications

(27 citation statements)

References 41 publications

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“…TMO is a crucial class of nonlayered family with unique magnetic properties, such as topological spin states 19 , 20 , multiferroic order 21 , 22 , and Verwey transition 23 , which have held great prospects in spin filter 24 , 25 , magnetic recording 26 , magnetoelectric coupling 27 , 28 , and so on. The formation of ultrathin TMO may overcome the limitations of 2D magnets, but its controllable growth is still a grand difficulty.…”

Section: Resultsmentioning

confidence: 99%

A general thermodynamics-triggered competitive growth model to guide the synthesis of two-dimensional nonlayered materials

et al. 2023

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Two-dimensional (2D) nonlayered materials have recently provoked a surge of interest due to their abundant species and attractive properties with promising applications in catalysis, nanoelectronics, and spintronics. However, their 2D anisotropic growth still faces considerable challenges and lacks systematic theoretical guidance. Here, we propose a general thermodynamics-triggered competitive growth (TTCG) model providing a multivariate quantitative criterion to predict and guide 2D nonlayered materials growth. Based on this model, we design a universal hydrate-assisted chemical vapor deposition strategy for the controllable synthesis of various 2D nonlayered transition metal oxides. Four unique phases of iron oxides with distinct topological structures have also been selectively grown. More importantly, ultra-thin oxides display high-temperature magnetic ordering and large coercivity. MnxFeyCo3-x-yO4 alloy is also demonstrated to be a promising room-temperature magnetic semiconductor. Our work sheds light on the synthesis of 2D nonlayered materials and promotes their application for room-temperature spintronic devices.

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Section: Resultsmentioning

confidence: 99%

A general thermodynamics-triggered competitive growth model to guide the synthesis of two-dimensional nonlayered materials

et al. 2023

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“…Furthermore, the operating frequency of such metasurfaces can be extended to cover the MHz to optical frequencies by choosing different self-biased magnetic materials. For example, in the MHz frequency range, cobalt or nickel spinel ferrites are ideal materials [36][37][38][39] ; in the GHz to THz range, hexaferrites with tunable magnetic anisotropies are good candidates 40 ; at optical frequency, self-biased garnet thin lms using magnetoelastic effects are promising materials 41,42 . Therefore, a variety of biasfree magnetic nonreciprocal metasurfaces are envisioned for future studies.…”

Section: Discussionmentioning

confidence: 99%

Magnet-free nonreciprocal metasurface for on-demand bi-directional phase modulation

Yang

Qin

Long

et al. 2022

Preprint

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Unconstrained by Lorentz reciprocity, nonreciprocal metasurfaces are uniquely capable of encoding distinctive optical functions on forward- and backward-propagating waves. The nonreciprocal metasurfaces reported to date require external electric or magnetic field biasing or rely on nonlinear effects, both of which are challenging to practically implement. Here, we propose and experimentally realize a magnet-free, linear, and passive nonreciprocal metasurface based on self-biased magnetic meta-atoms. Record transmittance up to 77% and operation angle reaching ±64˚ are experimentally demonstrated. Moreover, on-demand bidirectional phase modulation in a “LEGO-like” manner is theoretically proposed and experimentally demonstrated, enabling a cohort of nonreciprocal functionalities such as microwave isolation, nonreciprocal beam steering, nonreciprocal focusing, and nonreciprocal holography. The design can also be extended to MHz and optical frequencies, taking advantage of the wide variety of self-biased gyrotropic materials available. We foresee that the nonreciprocal metasurfaces demonstrated in this work will have a significant practical impact for applications ranging from nonreciprocal antennas and radomes to full-duplex wireless communication and radar systems.

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“…In this unique architecture, advanced functionalities like dielectrics, multiferroics, and solid oxide fuel cells can be allowed to tune precisely. Apart from selecting suitable oxides to induce vertical tensile strains, the interplay between the matrix and nanopillar also plays an essential role in generating strong cross-coupling of different degrees of freedom. , In Na 0.5 Bi 0.5 TiO 3 –NiO–NiFe 2 O 4 VAN thin films, interface coupling between three phases led to a large self-biased magnetoelectric effect at room temperature, whose value is up to 1.38 × 10 –9 s/m. Hence, extensive efforts have been devoted to enabling a strong interface interaction including spin, lattice, and phonon, which is significant for emerging novel properties.…”

Section: Introductionmentioning

confidence: 99%

Room-Temperature Ferroelectricity of Paraelectric Oxides Tailored by Nano-Engineering

Liu

Cao

Tang

et al. 2023

ACS Appl. Mater. Interfaces

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Inducing clear ferroelectricity in the quantum paraelectric SrTiO 3 is important for triggering methods to discover hidden phases in condensed matter physics. Several methods such as isotope substitution and freestanding membranes could introduce ferroelectricity in SrTiO 3 toward nonvolatile memory applications. However, the stable transformation from quantum paraelectric SrTiO 3 to ferroelectricity SrTiO 3 at room temperature still remains challenging. Here, we used multiple nano-engineering in (SrTiO 3 ) 0.65 /(CeO 2 ) 0.35 films to achieve an emergent room-temperature ferroelectricity. It is shown that the CeO 2 nanocolumns impose large out-of-plane strains and induce Sr/O deficiency in the SrTiO 3 matrix to form a clear tetragonal structure, which leads to an apparent room-temperature ferroelectric polarization up to 2.5 μC/cm 2 . In collaboration with density functional theory calculations, it is proposed that the compressive strains combined with elemental deficiency give rise to local redistribution of charge density and orbital order, which induce emergent tetragonality of the strained SrTiO 3 . Our work thus paves a pathway for architecting functional systems in perovskite oxides using a multiple nano-design.

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Self-biased magnetoelectric switching at room temperature in three-phase ferroelectric–antiferromagnetic–ferrimagnetic nanocomposites

Cited by 20 publications

References 41 publications

A general thermodynamics-triggered competitive growth model to guide the synthesis of two-dimensional nonlayered materials

A general thermodynamics-triggered competitive growth model to guide the synthesis of two-dimensional nonlayered materials

Magnet-free nonreciprocal metasurface for on-demand bi-directional phase modulation

Room-Temperature Ferroelectricity of Paraelectric Oxides Tailored by Nano-Engineering

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