Synthesis of dense arrays of multiferroic CoFe2O4–PbZr0.52Ti0.48O3 core/shell nanocables

Sallagoity, D.; Elissalde, Catherine; Majimel, Jérôme; Maglione, Mario; Antohe, Vlad‐Andrei; Araujo, Flavio Abreu; Sá, Pedro; Basov, Sergey; Piraux, Luc

doi:10.1039/c6ra19548b

Cited by 8 publications

(4 citation statements)

References 44 publications

(44 reference statements)

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“…Thereby, by tuning PZT shells sidewall thickness the easy magnetization axis and dipolar interaction between CoFe2 cores in the PZT-CoFe2 nanocable arrays can be controlled. The oxidation of CoFe2 to CFO inside pre-annealed three layers PZT 500 , tubular structures was confirmed by in situ X-ray diffraction [86]. The metallic CoFe2 and the oxide CFO coexist over a temperature range going from 300 °C to 500 °C.…”

Section: (1d) Nanostructures That Coaxially Combine Electric and Magnmentioning

confidence: 74%

Specific core-shell approaches and related properties in nanostructured ferroelectric ceramics

et al. 2018

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Interfaces are a major issue when designing ferroelectric nanostructured materials with tailored properties. In a context of integration and multifunctionality in the field of electronics, several strategies have been developed to control the microstructure and defect chemistry of interfaces that strongly impact the macroscopic properties. The suitability of the core-shell approaches that allow a subtle tuning of interface phenomena at different scales has been widely demonstrated. We focus here on the flexibility of the core-shell approach devoted to the processing of nanostructured ferroelectric composites. Our strategy relies on the use of advanced synthesis processes to design ferroelectric grains coated with shells of different nature, morphology and crystallinity. Typical examples will be reviewed with a specific attention on their impact on both microstructure and dielectric properties. Our approach, based also on the use of fast sintering technique, provides a guidance to design 3D bulk nanostructured ferroelectrics while controlling and/or exploiting size, interface and defects chemistry. The contribution of specific spectroscopies to probe interfacial chemistry and defects is underlined. The high density of interfaces in core-shell materials is obviously an advantage to target additional functionality such as magneto-electric coupling. This is illustrated in 3D composites and one dimensional nanostructures that coaxially combine electric and magnetic materials. The core-shell approach described here could be transferred to a much broader range of materials covering many functionalities provided a deeper understanding of the interfaces at the atomic scale is achieved and a further development of low temperature processing is reached.

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Section: (1d) Nanostructures That Coaxially Combine Electric and Magnmentioning

confidence: 74%

Specific core-shell approaches and related properties in nanostructured ferroelectric ceramics

et al. 2018

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“…The notation, such as 1–3, 0–3, and 2–2, is used to classify the structure of an ME composite in which the number describes the dimensional geometry of each phase . Various deposition techniques, such as electrochemical coating, , magnetron sputtering, , pulsed laser deposition (PLD), − spark plasma sintering, molecular beam epitaxy (MBE), , and metal–organic chemical vapor deposition (MOCVD), were used to fabricate ME composites.…”

Section: Introductionmentioning

confidence: 99%

Low-Temperature Growth of AlN Films on Magnetostrictive Foils for High-Magnetoelectric-Response Thin-Film Composites

Nguyen

Fleming

Bender

et al. 2021

ACS Appl. Mater. Interfaces

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This study reports a strong ME effect in thin-film composites consisting of nickel, iron, or cobalt foils and 550 nm thick AlN films grown by PE-ALD at a (low) temperature of 250 °C and ensuring isotropic and highly conformal coating profiles. The AlN film quality and the interface between the film and the foils are meticulously investigated by means of high-resolution transmission electron microscopy and the adhesion test. An interface (transition) layer of partially amorphous Al x O y /AlO x N y with thicknesses of 10 and 20 nm, corresponding to the films grown on Ni, Fe, and Co foils, is revealed. The AlN film is found to be composed of a mixture of amorphous and nanocrystalline grains at the interface. However, its crystallinity is improved as the film grew and shows a highly preferred (002) orientation. High self-biased ME coefficients (αME at a zero-bias magnetic field) of 3.3, 2.7, and 3.1 V·cm–1·Oe–1 are achieved at an off-resonance frequency of 46 Hz in AlN/Ni thin-film composites with different Ni foil thicknesses of 7.5, 15, and 30 μm, respectively. In addition, magnetoelectric measurements have also been carried out in composites made of 550 nm thick films grown on 12.5 μm thick Fe and 15 μm thick Co foils. The maximum magnetoelectric coefficients of AlN/Fe and AlN/Co composites are 0.32 and 0.12 V·cm–1·Oe–1, measured at 46 Hz at a bias magnetic field (H dc) of 6 and 200 Oe, respectively. The difference of magnetoelectric transducing responses of each composite is discussed according to interface analysis. We report a maximum delivered power density of 75 nW/cm3 for the AlN/Ni composite with a load resistance of 200 kΩ to address potential energy harvesting and electromagnetic sensor applications.

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“…Extensive studies were realized on many ferromagnetic NW arrays using various experimental techniques for a deeper understanding of the magnetic properties and spin-dependent transport properties in relation with their nanoscopic dimensions . The research activity at UCLouvain on magnetic NWs were also motivated by related applications in microwave devices [46][47][48][49][50][51][52][53][54] and multiferroic nanocomposites [55][56][57][58][59]. Recently, we demonstrated the suitability of three-dimensional (3D) nanoporous polymer templates to form dense interconnected magnetic NW networks with tunable geometrical parameters in terms of nanowire size, density, and orientation opens up the possibility for a controlled synthesis of a large variety of complex 3D networks of high aspect-ratio nanostructures with different geometries and materials [60][61][62][63][64][65][66][67].…”

Section: Introductionmentioning

confidence: 99%

Magnetic Nanowires

Piraux

2020

Applied Sciences

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Magnetic nanowires are attractive materials because of their morphology-dependent remarkable properties suitable for various advanced technologies in sensing, data storage, spintronics, biomedicine and microwave devices, etc. The recent advances in synthetic strategies and approaches for the fabrication of complex structures, such as parallel arrays and 3D networks of one-dimensional nanostructures, including nanowires, nanotubes, and multilayers, are presented. The simple template-assisted electrodeposition method enables the fabrication of different nanowire-based architectures with excellent control over geometrical features, morphology and chemical composition, leading to tunable magnetic, magneto-transport and thermoelectric properties. This review article summarizing the work carried out at UCLouvain focuses on the magnetic and spin-dependent transport properties linked to the material and geometrical characteristics.

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Synthesis of dense arrays of multiferroic CoFe₂O₄–PbZr_0.52Ti_0.48O₃ core/shell nanocables

Abstract: A major challenge in the development of efficient magnetoelectric nanocomposites is the adequate control of the interfaces, in order to avoid the formation of undesirable interphases and to ensure an optimal strain mediated coupling.

Cited by 8 publications

References 44 publications

Specific core-shell approaches and related properties in nanostructured ferroelectric ceramics

Specific core-shell approaches and related properties in nanostructured ferroelectric ceramics

Low-Temperature Growth of AlN Films on Magnetostrictive Foils for High-Magnetoelectric-Response Thin-Film Composites

Magnetic Nanowires

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