Journal ArticleDOI
Multiferroic properties of Bi1/2Sr1/2FeO3
TLDR
In this article, the spontaneous magnetic ordering of 6s2 lone pair electrons of Bi3+ ions and a possible coexistence of charge-ordering of site-and bond-centered types was investigated.Abstract:
Polycrystalline Bi1∕2Sr1∕2FeO3 was synthesized by solid state reaction method Powder x-ray diffraction pattern of the sample was fitted using a noncentrosymmetric rhombohedral crystal system of space group R3c The sample was found to be free from any secondary phases This single phase material exhibits simultaneously ferrimagnetism and ferroelectricity with magnetic and electrical Curie transitions at TCM=745K and TCE=465K, respectively Origin of this spontaneous magnetic order is discussed using the superexchange interaction between Fe ions The observed ferroelectric polarization is explained based on the spontaneous ordering of 6s2 lone pair electrons of Bi3+ ions and a possible coexistence of charge-ordering of site- and bond-centered typesread more
Citations
More filters
Journal ArticleDOI
Rietveld analysis, dielectric and magnetic properties of Sr and Ti codoped BiFeO3 multiferroic
TL;DR: In this paper, the structure, dielectric relaxation, and magnetic properties of polycrystalline Bi0.8Sr0.2Fe1/TixO3 multiferroics were investigated via the conventional solid state reaction method.
Journal ArticleDOI
The magnetic properties of Bi(Fe0.95Co0.05)O3 ceramics
TL;DR: In this paper, a rhombohedrally distorted BiFeO3 structure with compressive lattice distortion induced by the Co substitution at Fe sites from Raman study was obtained.
Journal ArticleDOI
Sr induced modification of structural, optical and magnetic properties in Bi1−xSrxFeO3 (x = 0, 0.01, 0.03, 0.05 and 0.07) multiferroic nanoparticles
TL;DR: In this article, multiferroic nanoparticles of Bi1−xSrxFeO3 (x = 0.01, 0.03,0.05 and 0.07) were prepared by a facile sol-gel route and the variation of their structural, optical, dielectric and magnetic properties on strontium concentration has been studied.
Journal ArticleDOI
Correlation between structure, oxygen content and the multiferroic properties of Sr doped BiFeO3
Shahzad Hussain,Shahzad Hussain,S. K. Hasanain,G. Hassnain Jaffari,Naveed Zafar Ali,Muhammad Siddique,S. Ismat Shah +6 more
TL;DR: In this article, a series of Bi1−xSrxFeO3−δ (0,⩽-x-0.45) multiferroic samples have been prepared in order to study the effect of divalent Sr content on the crystal structure, dielectric and magnetic properties.
Journal ArticleDOI
Vibrational, magnetic, and dielectric behavior of La-substituted BiFeO3-PbTiO3
TL;DR: In this article, the magnetic and ferroelectric ordering in La-substituted (Bi1−xLax) 0.5Pb0.5O3 was investigated using Raman, magnetization, and polarization measurements as a function of temperature.
References
More filters
Journal ArticleDOI
Revised effective ionic radii and systematic studies of interatomic distances in halides and chalcogenides
TL;DR: The effective ionic radii of Shannon & Prewitt [Acta Cryst. (1969), B25, 925-945] are revised to include more unusual oxidation states and coordinations as mentioned in this paper.
Journal ArticleDOI
Multiferroic and magnetoelectric materials
TL;DR: A ferroelectric crystal exhibits a stable and switchable electrical polarization that is manifested in the form of cooperative atomic displacements that arises through the quantum mechanical phenomenon of exchange.
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
Multiferroics: a magnetic twist for ferroelectricity
TL;DR: It is found that even a weak magnetoelectric interaction can lead to spectacular cross-coupling effects when it induces electric polarization in a magnetically ordered state.
Journal ArticleDOI
The Renaissance of Magnetoelectric Multiferroics
Nicola A. Spaldin,Manfred Fiebig +1 more
TL;DR: Magnetoelectric multiferroics combine ferromagnetic magnetization and ferroelectricity in the same phase and have tremendous potential for applications, not only because they possess the properties of both parent phenomena, but also because coupling between ferromagnetism and electric polarization can lead to additional novel effects as discussed by the authors.