Journal ArticleDOI
Enhancement of ferromagnetic properties in BiFeO3 polycrystalline ceramic by La doping
TLDR
In this paper, the structure transformation and magnetic properties of Bi1−xLaxFeO3 (x=0.0 − 0.15) ceramics prepared by a conventional solid-state reaction processing were analyzed.Abstract:
The authors present the structure transformation and magnetic properties of Bi1−xLaxFeO3 (x=0.0–0.15) ceramics prepared by a conventional solid-state reaction processing. Magnetic measurements reveal that remnant magnetization of 15% La-doped BiFeO3 has enhanced about 20 times as compared to pure BiFeO3. It is the structural phase transition (R3c–C222) near x=0.15 that destructs the spin cycloid, and thus enhances the ferromagnetic properties significantly. In these Bi1−xLaxFeO3 ceramic samples, besides the known antiferromagnetic Neel temperature TN1∼615K, another Neel temperature TN2∼260K can be observed due to the trace impurity phase of Bi2Fe4O9 in these ceramic samples.read more
Citations
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Multiferroic bismuth ferrite-based materials for multifunctional applications: Ceramic bulks, thin films and nanostructures
TL;DR: A comprehensive review on the progress of BFO-based materials made in the past fifteen years in the different forms of ceramic bulks, thin films and nanostructures, focusing on the pathways to modify different structures and to achieve enhanced physical properties and new functional behavior is provided in this paper.
Journal ArticleDOI
Controlled Fabrication of BiFeO3 Uniform Microcrystals and Their Magnetic and Photocatalytic Behaviors
TL;DR: In this article, Bismuth ferrite (BiFeO3) uniform microcrystals with various morphologies (microspheres and micro/submirocubes) were successfully synthesized by a controlled hydrothermal method.
Journal ArticleDOI
Effect of Mn substitution on electrical and magnetic properties of Bi0.9La0.1FeO3
TL;DR: In this paper, the electrical and magnetic properties of polycrystalline samples of Bi0.90La0.10(Fe1−xMnx)O3 (x=0, 0, 0.05,0.15, and 0.20) were prepared using a novel mechanical activation followed by a conventional solid-state reaction technique.
Journal ArticleDOI
Structure, ferroelectric properties, and magnetic properties of the La-doped bismuth ferrite
Zhenxiang Cheng,A.H. Li,Xiaolin Wang,Shi Xue Dou,Kiyoshi Ozawa,Hideo Kimura,Shujun Zhang,Thomas R. Shrout +7 more
TL;DR: In this article, a series of structure transformations depend upon the doping level of Bi1−xLaxFeO3 ceramics with x=0, 0.8La0.2 and Bi0.7La 0.3 have been synthesized by solid state reaction starting from metal oxides.
Journal ArticleDOI
Low leakage current and enhanced ferroelectric properties of Ti and Zn codoped BiFeO3 thin film
TL;DR: In this paper, the defect complexes between acceptors and oxygen vacancies in BFO and BFZO films are explained based on the formation of the defect complex between the acceptors.
References
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Journal ArticleDOI
Epitaxial BiFeO3 multiferroic thin film heterostructures.
Jian Wang,Jeffrey B. Neaton,Haimei Zheng,Valanoor Nagarajan,Satishchandra Ogale,B. T. Liu,Dwight Viehland,V. Vaithyanathan,Darrell G. Schlom,Umesh V. Waghmare,Nicola A. Spaldin,Karin M. Rabe,Manfred Wuttig,Ramamoorthy Ramesh +13 more
TL;DR: Enhanced polarization and related properties in heteroepitaxially constrained thin films of the ferroelectromagnet, BiFeO3, and combined functional responses in thin film form present an opportunity to create and implement thin film devices that actively couple the magnetic and ferroelectric order parameters.
Journal ArticleDOI
Revival of the Magnetoelectric Effect
Abstract: Recent research activities on the linear magnetoelectric (ME) effect?induction of magnetization by an electric field or of polarization by a magnetic field?are reviewed. Beginning with a brief summary of the history of the ME effect since its prediction in 1894, the paper focuses on the present revival of the effect. Two major sources for 'large' ME effects are identified. (i) In composite materials the ME effect is generated as a product property of a magnetostrictive and a piezoelectric compound. A linear ME polarization is induced by a weak ac magnetic field oscillating in the presence of a strong dc bias field. The ME effect is large if the ME coefficient coupling the magnetic and electric fields is large. Experiments on sintered granular composites and on laminated layers of the constituents as well as theories on the interaction between the constituents are described. In the vicinity of electromechanical resonances a ME voltage coefficient of up to 90?V?cm?1?Oe?1 is achieved, which exceeds the ME response of single-phase compounds by 3?5 orders of magnitude. Microwave devices, sensors, transducers and heterogeneous read/write devices are among the suggested technical implementations of the composite ME effect. (ii) In multiferroics the internal magnetic and/or electric fields are enhanced by the presence of multiple long-range ordering. The ME effect is strong enough to trigger magnetic or electrical phase transitions. ME effects in multiferroics are thus 'large' if the corresponding contribution to the free energy is large. Clamped ME switching of electrical and magnetic domains, ferroelectric reorientation induced by applied magnetic fields and induction of ferromagnetic ordering in applied electric fields were observed. Mechanisms favouring multiferroicity are summarized, and multiferroics in reduced dimensions are discussed. In addition to composites and multiferroics, novel and exotic manifestations of ME behaviour are investigated. This includes (i) optical second harmonic generation as a tool to study magnetic, electrical and ME properties in one setup and with access to domain structures; (ii) ME effects in colossal magnetoresistive manganites, superconductors and phosphates of the LiMPO4 type; (iii) the concept of the toroidal moment as manifestation of a ME dipole moment; (iv) pronounced ME effects in photonic crystals with a possibility of electromagnetic unidirectionality. The review concludes with a summary and an outlook to the future development of magnetoelectrics research.
Journal ArticleDOI
Observation of coupled magnetic and electric domains
TL;DR: Spatial maps of coupled antiferromagnetic and ferroelectric domains in YMnO3 are obtained by imaging with optical second harmonic generation and lead to a configuration that is dominated by the ferroelectromagnetic product of the order parameters.
Journal ArticleDOI
Temperature dependence of the crystal and magnetic structures of BiFeO3
TL;DR: In this paper, the temperature dependence of structural and magnetic order parameters of BiFeO3 with rhombohedral perovskite structure was investigated by means of neutron diffraction on a powder sample.
Journal ArticleDOI
Structural transformation and ferroelectromagnetic behavior in single-phase Bi1−xNdxFeO3 multiferroic ceramics
TL;DR: In this article, single-phase Bi1−xNdxFeO3 (BNFOx) multiferroic ceramics were prepared to study the effects of Nd substitution on their crystal structure and ferroelectromagnetic behavior.