Size effects in multiferroic<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:msub><mml:mrow><mml:mtext>BiFeO</mml:mtext></mml:mrow><mml:mn>3</mml:mn></mml:msub></mml:mrow></mml:math>nanodots: A first-principles-based study

Ren, Wei; Bellaïche, L.

doi:10.1103/physrevb.82.113403

Cited by 45 publications

(22 citation statements)

References 42 publications

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“…Among them, BiFeO 3 (BFO) is one of the most widely studied multiferroic materials, primarily because both its electrical and magnetic ordering occur above RT. In particular, multiferroic BFO nanostructures exhibit interesting magnetic and optical properties because of nanoscale size effects . So far, BFO nanomaterials with various sizes and shapes such as nanotubes, nanowires, nano/microcubes, nanospindles, and nanorods have been reported and exhibit different properties compared to the bulk form.…”

Section: Introductionmentioning

confidence: 99%

“…In particular, multiferroic BFO nanostructures exhibit interesting magnetic and optical properties because of nanoscale size effects. [5][6][7][8] So far, BFO nanomaterials with various sizes and shapes such as nanotubes, 9 nanowires, 10,11 nano/microcubes, 12,13 nanospindles, 14 and nanorods 15 have been reported and exhibit different properties compared to the bulk form. Therefore, the design of multiferroic BFO nanostructures with novel and well-defined morphologies is important for both fundamental research and relevant for designing new multifunctional materials combining magnetic, ferroelectric, and optoelectronic properties.…”

Section: Introductionmentioning

confidence: 99%

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Ultrafast Microwave Hydrothermal Synthesis of BiFeO₃ Nanoplates

Nechache

Davalos

et al. 2013

J. Am. Ceram. Soc.

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We report the synthesis of {100} c facets exposed single-crystalline BiFeO 3 (BFO) nanoplates, with thickness ranging from 20 to 160 nm and lateral size of submicrometers, via a simple and very rapid (1-2 min) microwave-assisted hydrothermal approach. We show that the microwave treatment gives comparable improvement in crystallinity of BFO nanocrystals with respect to traditional hydrothermal processes while requiring significantly less time and energy. In addition, we show that microwave radiation power, reaction time, and alkali concentration play important roles in the crystallinity and morphology of the products. We discuss a possible formation mechanism of the nanoplates based on our experimental results. Additionally, the BFO nanoplates exhibit weak ferromagnetic properties at room temperature, which we attribute to the size-confinement effect on magnetic ordering. The present microwave hydrothermal method has great potential in large-scale fabrication of BFO nanomaterials as well as other composite functional materials due to significantly reduced time and energy.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Ultrafast Microwave Hydrothermal Synthesis of BiFeO₃ Nanoplates

Nechache

Davalos

et al. 2013

J. Am. Ceram. Soc.

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“…The presence of a depolarizing electric field in finitesized ferroelectrics is known to reduce their Curie temperature and polarization P . There exists a critical size below which the nanoparticle ceases to be ferroelectric [24,25]. This effect was measured in free-standing BFO nanoparticles [19], where it was shown that P ≈ P Bulk for sizes down to 30 nm, with P reduced to 0.75P Bulk for size 13 nm.…”

Section: Introductionmentioning

confidence: 96%

Size-dependent bistability in multiferroic nanoparticles

Allen

Aupiais

Cazayous

et al. 2019

Phys. Rev. Materials

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Most multiferroic materials with coexisting ferroelectric and magnetic order exhibit cycloidal antiferromagnetism with wavelength of several nanometers. The prototypical example is bismuth ferrite (BiFeO3 or BFO), a room-temperature multiferroic considered for a number of technological applications. While most applications require small sizes such as nanoparticles, little is known about the state of these materials when their sizes are comparable to the cycloid wavelength. This work describes a microscopic theory of cycloidal magnetism in nanoparticles based on Hamiltonian calculations. It is demonstrated that magnetic anisotropy close to the surface has a huge impact on the multiferroic ground state. For certain nanoparticle sizes the modulus of the ferromagnetic and ferroelectric moments are bistable, an effect that may be used in the design of ideal memory bits that can be switched electrically and read out magnetically. arXiv:1812.08297v4 [cond-mat.mtrl-sci]

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“…These two ABO 3 perovskites are representatives of type I and type II multiferroics, respectively [3]. On the one hand, BiFeO 3 possesses simultaneously high magnetic transition temperature (about 640 K) and high FE Curie temperature T c (about 1,100 K) [4][5][6]. The polarization of TbMnO 3 *0.06 lC/cm 2 is much smaller than BiFeO 3 *100 lC/cm 2 by several orders of magnitude.…”

Section: Introductionmentioning

confidence: 97%

Selected multiferroic perovskite oxides containing rare earth and transition metal elements

Chen

et al. 2014

Chin. Sci. Bull.

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Multiferroic materials are currently the subject of intensive research worldwide, because of both their fundamental scientific problems and also possible technological applications. Among a number of candidates in the laboratories, compounds consisting of rare earth and transition metal perovskite oxides have very unusual structural and physical properties. In contrast to the so-called type I multiferroics, ferroelectricity may be induced by magnetic ordering or by applying external fields. In this review, the recent progress on the experimental and theoretical studies of some selected type II multiferroics is presented, with a focus on the perovskite oxides containing rare earth and transition metal elements. The rare earth orthoferrite crystals, rare earth titanate strained film, and rare earthbased superlattices are systematically reviewed to provide a broad overview on their promising electric, magnetic, and structural properties. The recent experimental advances in single-crystal growth by optical floating zone method are also presented. First-principles investigations, either supported by experimental results or awaiting for experimental verifications, are shown to offer useful guidance for the future applications of unconventional multiferroics.

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Size effects in multiferroicBiFeO3nanodots: A first-principles-based study

Abstract: An effective Hamiltonian scheme is developed to investigate structural and magnetic properties of BiFeO 3 nanodots under short-circuit-like electrical boundary conditions.

Cited by 45 publications

References 42 publications

Ultrafast Microwave Hydrothermal Synthesis of BiFeO₃ Nanoplates

Ultrafast Microwave Hydrothermal Synthesis of BiFeO₃ Nanoplates

Size-dependent bistability in multiferroic nanoparticles

Selected multiferroic perovskite oxides containing rare earth and transition metal elements

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Size effects in multiferroicBiFeO3nanodots: A first-principles-based study

Abstract: An effective Hamiltonian scheme is developed to investigate structural and magnetic properties of BiFeO 3 nanodots under short-circuit-like electrical boundary conditions.

Cited by 45 publications

References 42 publications

Ultrafast Microwave Hydrothermal Synthesis of BiFeO3 Nanoplates

Ultrafast Microwave Hydrothermal Synthesis of BiFeO3 Nanoplates

Size-dependent bistability in multiferroic nanoparticles

Selected multiferroic perovskite oxides containing rare earth and transition metal elements

Contact Info

Product

Resources

About

Ultrafast Microwave Hydrothermal Synthesis of BiFeO₃ Nanoplates

Ultrafast Microwave Hydrothermal Synthesis of BiFeO₃ Nanoplates