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Showing 1 to 20 of 37 for “"Multiferroics"”.
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Mueller matrix spectroscopic ellipsometry of multiferroics
Multiferroics, materials which possess several ferroic orders, are the focus of research in recent years. Among these materials are oxide crystals, such as, for example, RMnO_3, RMn_2O_5, R_3Fe_5O_{12}, where R stands for rare earth ions. The most fascinating physics occurs when magnon-lattice …
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Static and Dynamical Properties of Multiferroics
… a class of functional materials known as multiferroics has captured significant attention because of providing a huge potential for new designs due to possessing multiple ferroic order parameters at the same time. More specifically, magnetoelectrics as a category of multiferroic materials, …
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Analysis of Mueller matrices of metamaterials and multiferroics
The optical spectra of complex materials such as magnetic-dielectric media, magnetoelectric and multiferroic crystals, materials with intrinsic chirality, and metamaterials are studied. These media are important both for: (i) their interesting optical effects, such as Negative Index of Refraction …
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Analysis of far-infrared optical spectra of multiferroics
The optical spectra of multiferroic crystals Dy_3Fe_5O_{12}, Tb_3Fe_5O_{12}, and four hexagonal RMnO_3 (5D= Er, Tm, Yb, Lu) are studied using intense bright synchrotonic light in the infrared spectral range. In regards to the materials analyzed, two rare earth iron garnets and four rare earth …
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Magnetoelectric Oxide Nanocomposite Heterostructures
Multiferroics have attracted lots of research interest due to their potential in numerous multifunctional applications. The multiferroic materials could simultaneously exhibit two or more ferroic order parameters, and the coupling effects between ferroelectricity and ferromagnetism are named as …
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Magnetoelectric Coupling in BaTiO3-BiFeO3 Multilayers: Growth Optimization and Characterization
… multilayers of BaTiO3 (BTO) and BiFeO3 (BFO). Multiferroics possess more than one ferroic order parameter, in this case ferroelectricity and anti-ferromagnetism. Cross-coupling between these otherwise separate order parameters promises great advantages in the fields of multistate memory, …
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Structure, magnetism and multiferroicity in self-assembled oxide nanocomposites
… phase materials. In particular, magnetoelectric multiferroics, materials that exhibit two or more ferroic orders (such as ferromagnetism and ferroelectricity) and also exhibit electric field control of magnetism, have been widely explored, due to their utility in realizing novel low power …
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Magnetoelectric Properties of Epitaxial Spinel Oxide Thin Films
Non-collinear spinel multiferroics, which have an AB2O4 structure, have attracted a great deal of attention in the past few years. Amongst them, the one that has drawn great attention is spinel vanadate, FeV2O4 (FVO), which has transition metal elements at both A and B sites. The interplay among …
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Bismuto mangano oksido ir giminingos keramikos dielektriniai tyrimai /
Multiferroics are well known for their spontaneous magnetization and polarization, which make possible the creation of innovative technologies. The dielectric and electric properties of BiMnO3 and (Bi0.06Na0.94)(Mn0.04Nb0.96)O3 ceramics were studied in this work. Complex dielectric permittivity was …
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Design and Testing of the Measuring System for the Characterization of Magnetoelectric Composites
… for testing magnetoelectric properties of the multiferroics is relatively inexpensive and versatile. The advantage of the new method described below is that the same set of instruments in different configurations enables multiple measurements of various parameters characterizing multiferroic …
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Multiferroic Bismuth Ferrite-Lead Titanate and Iron-Gallium Crystalline Solutions: Structure-Property Investigations
Recently, multiferroics-defined as materials with coexistence of at least two of the ferroelectric, ferroelastic and ferromagnetic effects-have attracted enormous research activities. In this thesis, the structure and properties of multiferrioic BiFeO3-x%PbTiO3 and Fe-x%Ga crystalline solutions …
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Magnetism in crystalline rare-earth compounds
… in TbMn2O5. The outstanding question in many multiferroics regards the exact microscopic mechanisms at play. Due to the huge potential in technology, this has been the subject of intense debate over that past decade. We have shown, through ab-initio computation and the simultaneous measurement …
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EPITAXIAL SPIN-ORBIT AND MAGNETIC MATERIALS FOR INTEGRATION ONTO A SEMICONDUCTOR PLATFORM
… focuses on nitride semiconductors, LuFeO3 multiferroics, several ferromagnetic candidates, and Bi-based spin-orbit materials and result in multiple candidate heterostructures for a prototype device. These efforts lay the foundation for realizing a fully-functional SOTFET device in the …
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Investigating the Cluster Chemistry of α-Methyl-2-pyridine methanol (mpmH) with Select 3d Ions
… of chiral SMMs, magnetochiral dichroism and multiferroics. In Chapter 2, two NiII clusters, {Ni8} and {Ni18} prepared from rac-mpmH are reported. The {Ni8} cluster crystallizes in a trapezoidal prismatic topology and contains tetrazolate ligands that are formed via a metal-assisted click …
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Spectroscopic study of emergent electronic phases in transition metal based compounds
… storage and processing. Spin spiral type-II multiferroics exhibit an inversion-symmetry-breaking antiferromagnetic order which directly induces ferroelectric polarization, allowing for symmetry protected cross-control between spin chirality and polar order. This intrinsic coupling between the …
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Nanoscale Engineering for Mixed-Dimensional Heterostructure Growth and Integration
… transfer via sacrificial interlayer for emergent multiferroics; and 3) self-assembled block copolymer thin films templating hybrid nanostructures.
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Design of robust spin-transfer torque magnetic random access memories for ultralow power high performance on-chip cache applications
… demonstrated that a class of materials called multiferroics can enable manipulation of magnetization using electric fields via magnetoelectric effects. A read assist technique using an MTJ structure incorporating multiferroic materials is proposed and analyzed. It was found that it is very …
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Static and Dynamical Properties of Ferroelectrics and Related Material in Bulk and Nanostructure Forms
<p>Ferroelectrics (FE) and multiferroics (MFE) have attracted a lot of attentions due to their rich and novel properties. Studies towards FE and MFE are of both fundamental and technological importance. We use a first-principles-based effective Hamiltonian method, conventional ab-initio packages and …
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Inelastic light scattering studies of quantum phase transitions in CuxTiSe2 and multiferroic TbMnO3
… charge/orbital ordering (COO). Magnetoelectric multiferroics are an important and interesting sub-class of strongly correlated systems. These are systems whose magnetic and electric orders are strongly coupled, thereby showing exquisite tunability of the electric polarization via applied …
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Effects of transition metal doping on multiferroic ordering in ni3v2o8 and fevo4
… extremely important in tuning the properties of multiferroics in general. Cu doped Ni3V2O8 studies show it is possible to develop a sizable net magnetization simultaneously with strong polarization and good magnetoelectric coupling which is a much desirable property to have for device …
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