scholarly journals A short review of the magnetoelectric effect and related experimental techniques on single phase (multi-) ferroics

2009 ◽  
Vol 71 (3) ◽  
pp. 299-313 ◽  
Author(s):  
J.-P. Rivera
Keyword(s):  
Single Phase ◽  
Magnetoelectric Effect ◽  
Short Review ◽  
Experimental Techniques

scholarly journals Modelling the experimental electron density: only the synergy of various approaches can tackle the new challenges

IUCrJ ◽  
2015 ◽  
Vol 2 (4) ◽  
pp. 441-451 ◽  
Author(s):  
Piero Macchi ◽  
Jean-Michel Gillet ◽  
Francis Taulelle ◽  
Javier Campo ◽  
Nicolas Claiser ◽  
...  
Keyword(s):  
Electron Density ◽  
Spin Density ◽  
Physical Property ◽  
General Meeting ◽  
Short Review ◽  
Experimental Techniques ◽  
X Rays ◽  
Position Space ◽  
Accuracy Of Measurements ◽  
A Charge

Electron density is a fundamental quantity that enables understanding of the chemical bonding in a molecule or in a solid and the chemical/physical property of a material. Because electrons have a charge and a spin, two kinds of electron densities are available. Moreover, because electron distribution can be described in momentum or in position space, charge and spin density have two definitions and they can be observed through Bragg (for the position space) or Compton (for the momentum space) diffraction experiments, using X-rays (charge density) or polarized neutrons (spin density). In recent years, we have witnessed many advances in this field, stimulated by the increased power of experimental techniques. However, an accurate modelling is still necessary to determine the desired functions from the acquired data. The improved accuracy of measurements and the possibility to combine information from different experimental techniques require even more flexibility of the models. In this short review, we analyse some of the most important topics that have emerged in the recent literature, especially the most thought-provoking at the recent IUCr general meeting in Montreal.

Magnetoelectric Properties in Nickel Ferrite – Niobate Relaxor Bulk Composites

2012 ◽  
Vol 77 ◽  
pp. 215-219
Author(s):  
Piotr Guzdek
Keyword(s):  
Magnetic Field ◽  
Nickel Ferrite ◽  
Room Temperature ◽  
Single Phase ◽  
Magnetoelectric Effect ◽  
Multiferroic Materials ◽  
Fundamental Interest ◽  
Practical Applications ◽  
Magnetoelectric Properties ◽  
Properties Of Composites

Magnetoelectric effect in multiferroic materials is widely studied for its fundamental interest and practical applications. The magnetoelectric effect observed for single phase materials like Cr2O3, BiFeO3, Pb(Fe0.5Nb0.5)O3is usually small. A much larger effect can be obtained in composites consisting of magnetostrictive and piezoelectric phases. This paper investigates the magnetostrictive and magnetoelectric properties of nickel ferrite Ni0.3Zn0.62Cu0.08Fe2O4- relaxor Pb(Fe0.5Nb0.5)O3bulk composites. The magnetic properties of composites shows a dependence typical of such composite materials, i.e. it consists of a dominating signal from ferrimagnetic phase (ferrite) and a weak signal from paramagnetic (antiferromagnetic) phase (relaxors). Magnetoelectric effect at room temperature was investigated as a function of static magnetic field (300-7200 Oe) and frequency (10 Hz-10 kHz) of sinusoidal modulation magnetic field. The magnetoelectric effect increase slightly before reaching a maximum at HDC= 750 Oe and then decrease. The magnetoelectric coefficient increases continuously as frequency is raised, although this increase is less pronounced in the 1-10 kHz range.

Giant self-biased converse magnetoelectric effect in multiferroic heterostructure with single-phase magnetostrictive materials

2014 ◽  
Vol 105 (17) ◽  
pp. 172408 ◽  
Author(s):  
Jitao Zhang ◽  
Ping Li ◽  
Yumei Wen ◽  
Wei He ◽  
Aichao Yang ◽  
...  
Keyword(s):  
Single Phase ◽  
Magnetoelectric Effect ◽  
Magnetostrictive Materials ◽  
Multiferroic Heterostructure

scholarly journals Progress in the Development of Single-Phase Magnetoelectric Multiferroic Oxides

Ceramist ◽  
2021 ◽  
Vol 24 (3) ◽  
pp. 228-247
Author(s):  
Jae-Hyeon Cho ◽  
Wook Jo
Keyword(s):  
Single Phase ◽  
Random Access ◽  
Random Access Memory ◽  
Short Review ◽  
Access Memory ◽  
Multiferroic Properties ◽  
Multiferroic Oxides ◽  
Novel Applications ◽  
Widespread Interest ◽  
Ferroelectric Transition Temperature

Magnetoelectric (ME) multiferroics manifesting the coexistence and the coupling of ferromagnetic and ferroelectric order are appealing widespread interest owing to their fascinating physical behaviors and possible novel applications. In this review, we highlight the progress in single-phase ME multiferroic oxides research in terms of the classification depending on the physical origins of ferroic properties and the corresponding examples for each case, i.e., material by material, along with their ME multiferroic properties including saturation magnetization, spontaneous polarization, (anti)ferromagnetic/ferroelectric transition temperature, and ME coefficient. The magnetoelectrically-active applications of high expectancy are presented by citing the representative examples such as magnetoelectric random-access-memory and multiferroic photovoltaics. Furthermore, we discuss how the development of ME multiferroic oxides should proceed by considering the current research status in terms of developed materials and designed applications. We believe that this short review will provide a basic introduction for the researchers new to this field.

Controlled Atmosphere Thermal Treatment for Pyrochlore Phase Elimination of PMN-PT/CFO Prepared by Spark Plasma Sintering

2014 ◽  
Vol 975 ◽  
pp. 274-279 ◽  
Author(s):  
Diego Seiti Fukano Viana ◽  
José Antônio Eiras ◽  
William Junior Nascimento ◽  
Fabio Luiz Zabotto ◽  
Ducinei Garcia
Keyword(s):  
Grain Size ◽  
Spark Plasma Sintering ◽  
Single Phase ◽  
Magnetoelectric Effect ◽  
Pyrochlore Phase ◽  
Practical Applications ◽  
Plasma Sintering ◽  
Average Grain Size ◽  
Spark Plasma ◽  
Phase Elimination

Multiferroics are interesting materials which present more than one ferroic property and have a great potential for practical applications [,,]. In addition, the coupling of magnetic and electric properties, the magnetoelectric effect (ME), offers news possibilities to applications [2,]. The magnetoelectric effect can be observed in single-phase materials like LuFe2O4, BiFeO3, etc. [1,] or in composites like PMN-PT/CFO, BaTiO3/CoFe2O4, etc. The ME composites have advantages over single-phase materials. They are easier to fabricate, less expensive, and have a wider range of working temperatures than single-phase materials []. However, some parameters that enhance the ME response need to be optimized. These parameters are the composition, the microstructure (grain size, grain orientation) and sintering parameters [6]. Thus, this work attempts to create a synthesis protocol to prepare the ME composite PMN-PT/CFO by Spark Plasma Sintering (SPS) keeping the average grain size as small as possible.

Utilizing alternate target deposition to increase the magnetoelectric effect at room temperature in a single phase M-type hexaferrite

2017 ◽  
Vol 7 (2) ◽  
pp. 97-101 ◽  
Author(s):  
Hessam Izadkhah ◽  
Saba Zare ◽  
Sivasubramanian Somu ◽  
Fabrizio Lombardi ◽  
Carmine Vittoria
Keyword(s):  
Room Temperature ◽  
Single Phase ◽  
Magnetoelectric Effect ◽  
Image Position

Abstract

Combining Magnetism and Ferroelectricity towards Multiferroicity

2012 ◽  
Vol 189 ◽  
pp. 15-40
Author(s):  
Dinesh Shukla ◽  
Nhalil E. Rajeevan ◽  
Ravi Kumar
Keyword(s):  
Long Range ◽  
Recent Progress ◽  
Single Phase ◽  
Magnetoelectric Effect ◽  
Condensed Matter ◽  
Ferroelectric Properties ◽  
Magnetic Ordering ◽  
Electric Polarization ◽  
Multiferroic Materials ◽  
The Past

The attempts to combine both the magnetic and ferroelectric properties in one material started in 1960s predominantly by the group of Smolenskii and Schmid [1. Dzyaloshinskii first presented the theory for multiferroicity in Cr2O3, which was soon experimentally confirmed by Astrov [5,. Further work on multiferroics was done by the group of Smolenskii in St. Petersburg (then Leningrad) [7, but the term multiferroic was first used by H. Schmid in 1994 [. These efforts have resulted in many fundamental observations and opened up an entirely new field of study. Schmid [ defined the multiferroics as single phase materials which simultaneously possess two or more primary ferroic properties. The term multiferroic has been expanded to include materials which exhibit any type of long range magnetic ordering, spontaneous electric polarization, and/or ferroelasticity. In the past decade, several hundreds of papers related to multiferroic materials and magnetoelectric effect have been published every year, making this topic one of the hottest areas in condensed matter physics from fundamental science as well as applications viewpoints. This article sheds light on recent progress about the developments of new multiferroics by combining unconventional magnetism and ferroelectricity with an emphasis on Bi based multiferroic materials. Specifically results of Ti doped BiMn2O5and Bi doped Co2MnO4multiferroics are discussed.

Influence of Heat Treatments on Microstructures in an Fe-Co-V Alloy

1974 ◽  
Vol 32 ◽  
pp. 512-513
Author(s):  
S. Mahajan ◽  
M. R. Pinnel ◽  
J. E. Bennett
Keyword(s):  
Single Phase ◽  
Alloy Composition ◽  
Supersaturated Solid Solution ◽  
Cell Formation ◽  
Heat Treatments ◽  
Air Cooling ◽  
Iced Brine ◽  
Transmission Electron ◽  
The Matrix ◽  
Bcc Structure

The microstructural changes in an Fe-Co-V alloy (composition by wt.%: 2.97 V, 48.70 Co, 47.34 Fe and balance impurities, such as C, P and Ni) resulting from different heat treatments have been evaluated by optical metallography and transmission electron microscopy. Results indicate that, on air cooling or quenching into iced-brine from the high temperature single phase ϒ (fcc) field, vanadium can be retained in a supersaturated solid solution (α2) which has bcc structure. For the range of cooling rates employed, a portion of the material appears to undergo the γ-α2 transformation massively and the remainder martensitically. Figure 1 shows dislocation topology in a region that may have transformed martensitically. Dislocations are homogeneously distributed throughout the matrix, and there is no evidence for cell formation. The majority of the dislocations project along the projections of <111> vectors onto the (111) plane, implying that they are predominantly of screw character.

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