scholarly journals Multi-Ferroic Properties on BiFeO3/BaTiO3 Multi-Layer Thin-Film Structures with the Strong Magneto-Electric Effect for the Application of Magneto-Electric Devices

Coatings ◽  
2021 ◽  
Vol 11 (1) ◽  
pp. 66
Author(s):  
Cheng-Wei Hu ◽  
Ching-Min Yen ◽  
Yu-Chia Feng ◽  
Liang-Hsi Chen ◽  
Bo-Zhou Liao ◽  
...  
Keyword(s):  
Material Properties ◽  
Tunneling Current ◽  
Magnetic Sensors ◽  
Spin Orbit ◽  
X Ray Diffraction ◽  
X Ray ◽  
Saturated Polarization ◽  
Polarization Electric Field ◽  
Layer Thin Film ◽  
Electric Effect

The characteristics of X-ray Diffraction (XRD), Current (I)-Voltage (V), and the Polarization-Electric field (P-E) on the BiFeO3 (BFO), BaTiO3 (BTO), and our proposed Multi-Layer (ML) BiFeO3/BaTiO3 (BFO/BTO) samples are studied systemically. The influence of these films with and without different external Magnetic (Mex.) inputs is also investigated. Our proposed multi-ferroic ML BFO/BTO sample has a lower tunneling current (Jg) (~5 × 103 times) and a stronger magneto-electric effect (an ~25 times higher value of the change of saturated polarization Ps with the Mex. inputs than the pure multi-ferroic BFO sample. The material properties for ML BFO/BTO samples can be optimized with the combination of the advantages of BFO and BTO thin films. The stronger magneto-electric effect in our proposed ML samples can have many applications such as magnetic sensors, magnetic electric devices, and logic Magneto-Electric Spin–Orbit (MESO) devices.

The Influence of Mn Doping on the Dielectric Properties of Ba0.5Sr0.5TiO3 Ceramics

2016 ◽  
Vol 859 ◽  
pp. 18-23 ◽  
Author(s):  
Li Ping Zhao ◽  
Wen Hong Tao ◽  
Xing Hua Fu ◽  
Wen Zhe Cao ◽  
Guo Yuan Cheng ◽  
...  
Keyword(s):  
Dielectric Properties ◽  
Material Properties ◽  
Room Temperature ◽  
Sol Gel ◽  
Barium Nitrate ◽  
Strontium Nitrate ◽  
X Ray Diffraction ◽  
Mn Doping ◽  
X Ray ◽  
Scanning Electron

(Ba0.5Sr0.5)1-xMnxTiO3(x=0,0.01,0.03,0.05)ceramics were prepared via a new sol-gel method with titannium oxide, strontium nitrate, barium nitrate and manganous nitrate as raw materials.The effect of Mn doping on the microstructure and dielectric properties of the BST were characterized by field scanning electron microscopy,x-ray diffraction and impedance analyser.It was found that the dopted ions could not alter the basic crystal strcuture and they only improved the material properties as modified ions when x≤0.3.The (Ba0.5Sr0.5)1-xMnxTiO3 ceramics sintered at 1250°C for 2h exhibited good dielectric properties(er=1330,tand=0.03)at room temperature and f=1KHz when x=0.03 and the grains were regular and uniform ,indicating a dense microstrcture.

scholarly journals Challenges in Rietveld Refinement and Structure Visualization in Ceramics

2021 ◽  
Author(s):  
Touseef Ahmad Para ◽  
Shaibal Kanti Sarkar
Keyword(s):  
Open Access ◽  
Diffraction Pattern ◽  
Rietveld Refinement ◽  
Material Properties ◽  
Material Science ◽  
Research Report ◽  
X Ray Diffraction ◽  
X Ray ◽  
Study Material ◽  
Core Concepts

The most common and basic characterization in the field of material science is the almighty X-ray diffraction (XRD). In every institute, every research report and every manuscript, concerning material properties, the X-ray diffraction pattern is essentially found. Although the basis of these works relies on the fact that X-ray diffraction pattern was found to be matching with some structure in a database, the in depth significance of the various characteristic diffraction manifestations of various physical characters are rarely discussed. Most of the researchers (especially beginners) are either not aware of the prowess of X-ray based characterizations, or have not been introduced to it properly or may be sometimes they are not interested in its results at all. The decreased interest (later) in the results from such studies might be for not being productive enough for time spending or non-effectiveness in justifying the motivation of the work. The former two are more related to the availability and accessibility of study material for the development of core concepts. Most of the institutes always do not have access to the span-wide scientific literature and the researchers joining these institutions are partly affected. In this context the effective open-access and free availability of intech-open, it is prudent to at least attempt to accumulate, assimilated and aggregate the concepts related to X-ray diffraction in a single package. The chapter is an attempt in the path of this route.

Scanning Tunneling Optical Resonance Microscopy (STORM)

2002 ◽  
Vol 738 ◽  
Author(s):  
R.P. Raffaelle ◽  
T. Gennett ◽  
J. E. Lau ◽  
P. Jenkins ◽  
S.L. Castro ◽  
...  
Keyword(s):  
Spatial Light Modulator ◽  
Tunneling Current ◽  
Scanning Tunneling ◽  
X Ray Diffraction ◽  
Light Modulator ◽  
Optical Resonance ◽  
X Ray ◽  
Lock In ◽  
Good Agreement

ABSTRACTThe ability to determine the in-situ optoelectronic behavior of semiconductor materials has become especially important as the size of device architectures is reduced and the development of complex microsystems has increased. Scanning Tunneling Optical Resonance Microscopy or STORM has the ability to interrogate the optical bandgap as a function of position within a semiconductor microstructure. This technique uses a tunable solid-state Ti sapphire laser whose output is “chopped” using a spatial light modulator and is coupled by a fiber optic to a scanning tunneling microscope in order to illuminate the tip-sample junction. The photoenhanced portion of the tunneling current is spectroscopically measured using a lock-in technique. The capabilities of this technique were verified using semiconductor microstructure calibration standards that were grown by organometallic vapor phase epitaxy (OMVPE) at the NASA Glenn Research Center. Bandgaps characterized by STORM measurements were found to be in good agreement with the bulk values determined by transmission spectroscopy, photoluminescence, and with the theoretical values that were based on x-ray diffraction results.

Effects of Annealing on the Crystallization and Morphology of Electrospun Poly(L-lactic acid) Fibers

2013 ◽  
Vol 745-746 ◽  
pp. 473-477 ◽  
Author(s):  
Feng Su ◽  
Hao Yu ◽  
Shu Qi Zhu ◽  
Wen Juan Chen ◽  
Fang Huang ◽  
...  
Keyword(s):  
Lactic Acid ◽  
Material Properties ◽  
Annealing Temperature ◽  
Xrd Analysis ◽  
Important Application ◽  
Biodegradable Material ◽  
X Ray Diffraction ◽  
X Ray ◽  
Polymeric Nanofibers ◽  
Spun Fiber

Biodegradable polymeric nanofibers produced by electrospinning have been used as scaffolds for tissue engineering. As one kind of biodegradable material, electrospun polylatic acid fibers have an important application on biomedical materials. For better application of this kind of material, the properties of annealed electrspun poly (L-lactic acid) (PLLA) was studied in this investigation. The material properties of as-spun and annealed nanofibers were studied using differential scanning calorimeter (DSC), X-ray diffraction (XRD) and field emission scanning electron microscope (FE-SEM). Thermal and XRD analysis revealed that PLLA as-spun fiber exhibited amorphous phase and began to crystalline when annealing temperature was above its glass transition temperature. SEM measurements of annealed fibers showed that fusion among fibers occurred when annealing temperature was too high.

Valence band structure of CuGa(S1−zSez)2 alloys

1986 ◽  
Vol 64 (1) ◽  
pp. 45-52 ◽  
Author(s):  
Miguel Quintero ◽  
Kajornyod Yoodee ◽  
John C. Woolley
Keyword(s):  
Crystal Field ◽  
Dimensionless Parameter ◽  
Alloy System ◽  
Spin Orbit ◽  
X Ray Diffraction ◽  
X Ray ◽  
Cubic Model ◽  
Band Transition ◽  
Valence Bands ◽  
Made In

Measurements of wavelength-modulated reflectance have been made in the temperature range 20–300 K on single-crystal samples of the alloy system CuGa(S1−zSez)2 and values of the valence to conduction band transition energies EA, EB and EC determined as a function of temperature. It has been shown that if the quasi-cubic model is used in the analysis of these data to determine values of spin-orbit and crystal-field splittings and their variation with temperature, the results are inconsistent with those from X-ray diffraction measurements of lattice parameters and tetragonal distortion. This is because the quasi-cubic model does not properly allow for the fractional d-character of the valence bands of these materials. The results have therefore been analyzed in terms of a recently developed theoretical model which takes into account the effects of p–d hybridization on both spin-orbit and crystal-field splittings. The analysis gives values of a dimensionless parameter M/E which is a measure of the interaction between the p and d states forming the valence bands and which determines the fractional d-like character [Formula: see text] of those bands. The variations of M/E and [Formula: see text] with both temperature and composition are considered in some detail.

scholarly journals Ferroelectric Properties of CuFe2O4, BaFe2O4, Ba0.2La0.8Fe2O4 Nanoparticles

2019 ◽  
Vol 1 (1) ◽  
Author(s):  
U. Naresh ◽  
R. Jeevan Kumar
Keyword(s):  
Barium Ferrite ◽  
Structural Parameters ◽  
Ferroelectric Properties ◽  
Orthorhombic Phase ◽  
Ferrite Nanoparticles ◽  
Cubic Phase ◽  
Copper Ferrite ◽  
X Ray Diffraction ◽  
X Ray ◽  
Polarization Electric Field

In this article, we report ferroelectric properties of copper ferrite CuFe2O4 nanoparticles (CFN), Barium ferrite nanoparticles BaFe2O4 (BFN) and La substituted barium ferrite Ba0.2La0.8Fe2O4 (BLFN) nanoparticles synthesized via hydrothermal technique. The X-Ray diffraction for the synthesized particles reflects the cubic phase formation for CuFe2O4, orthorhombic phase structure for the BaFe2O4 and cubic formation of Ba0.2La0.8Fe2O4 (BLFN). The structural parameters such as crystallite size and micro-strain are computed from XRD and Williamson-Hall(W-H) analysis. The polarization- electric field (P-E) loop studies gave information about the ferroelectric nature of the synthesized samples. It was noticed that the CFN particle has a lossy dielectric nature whereas BFN, BLFN samples exhibit a multiferroic nature.

scholarly journals Structural properties of the red-color overglazes on the Kakiemon-style porcelains produced in the later 17th century by means of X-ray diffraction (I)

Cerâmica ◽  
2009 ◽  
Vol 55 (334) ◽  
pp. 120-127 ◽  
Author(s):  
M. Hidaka ◽  
H. Horiuchi ◽  
K. Ohashi ◽  
R. P. Wijesundera ◽  
L. S. R. Kumara ◽  
...  
Keyword(s):  
Material Properties ◽  
Fine Particles ◽  
Porcelain Body ◽  
X Ray Diffraction ◽  
Edo Period ◽  
X Ray ◽  
Structural Correlation ◽  
Red Color ◽  
The Stability ◽  
Color Emission

Kakiemon-style porcelains produced at Arita areas (SAGA) in Kyushu Island are famous Japanese porcelains. The porcelain-techniques creating its elegant and bright red-color underglaze and overglaze were found and developed in 1650's (early Edo period) first by Kakiemon kiln. Red-color overglaze and transparent glaze of the Kakiemon-style porcelains have been investigated by means of X-ray diffraction using synchrotron radiation. The results suggest that the red-color brightness is mainly induced by micro-structural correlation between α-Fe2O3 fine particles, as red-color emission elements, and other oxides of SiO2, Al2O3, CaO, KNaO, PbO. The stability of the red-overglaze on the porcelain surface is related to interfacial fusion of the glasses existing in the fritted red-overglaze and the transparent glaze on the porcelain body. The ancient porcelain-techniques of the Kakiemon-style porcelains are clearly based on the micro-structural and material properties of the overglazes, the underglazes, and the transparent glazes, though the techniques were experimentally and accidentally found and developed in the Edo period.

scholarly journals Resonant X-ray Diffraction Study of the Strongly Spin-Orbit-Coupled Mott InsulatorCaIrO3

2013 ◽  
Vol 110 (21) ◽  
Author(s):  
Kenya Ohgushi ◽  
Jun-ichi Yamaura ◽  
Hiroyuki Ohsumi ◽  
Kunihisa Sugimoto ◽  
Soshi Takeshita ◽  
...  
Keyword(s):  
Diffraction Study ◽  
Spin Orbit ◽  
X Ray Diffraction ◽  
X Ray

scholarly journals Dependence of material properties and photovoltaic performance of triple cation tin perovskites on the iodide to bromide ratio

2019 ◽  
Vol 150 (11) ◽  
pp. 1921-1927 ◽  
Author(s):  
Stefan Weber ◽  
Thomas Rath ◽  
Birgit Kunert ◽  
Roland Resel ◽  
Theodoros Dimopoulos ◽  
...  
Keyword(s):  
Material Properties ◽  
Fill Factor ◽  
Open Circuit Voltage ◽  
Short Circuit ◽  
Photovoltaic Performance ◽  
Short Circuit Current ◽  
Short Circuit Current Density ◽  
Open Circuit ◽  
X Ray Diffraction ◽  
X Ray

Abstract In this work, the influence of a partial introduction of bromide (x = 0–0.33) into MA0.75FA0.15PEA0.1Sn(BrxI1−x)3 (MA: methylammonium, FA: formamidinium, PEA: phenylethylammonium) triple cation tin perovskite on the material properties and photovoltaic performance is investigated and characterized. The introduction of bromide shifts the optical band gap of the perovskite films from 1.29 eV for the iodide-based perovskite to 1.50 eV for the perovskite with a bromide content of x = 0.33. X-ray diffraction measurements reveal that the size of the unit cell is also gradually reduced based on the incorporation of bromide. Regarding the photovoltaic performance of the perovskite films, it is shown that already small amounts of bromide (x = 0.08) in the perovskite system increase the open circuit voltage, short circuit current density and fill factor. The maximum power conversion efficiency of 4.63% was obtained with a bromide content of x = 0.25, which can be ascribed to the formation of homogeneous thin films in combination with higher values of the open circuit voltage. Upon introduction of a higher amount of bromide (x = 0.33), the perovskite absorber layers form pinholes, thus reducing the overall device performance. Graphic abstract

ENHANCED MULTIFERROIC PROPERTIES OF BiFeO3 CERAMICS BY Mo DOPING

2011 ◽  
Vol 25 (18) ◽  
pp. 1521-1528 ◽  
Author(s):  
X. ZHANG ◽  
G. Q. ZHANG ◽  
J. MIAO ◽  
X. G. XU ◽  
Y. JIANG
Keyword(s):  
Electrical Properties ◽  
Electric Field ◽  
Phase Structure ◽  
Ferroelectric Properties ◽  
Sol Gel ◽  
X Ray Diffraction ◽  
X Ray ◽  
Multiferroic Properties ◽  
Mo Doping ◽  
Polarization Electric Field

We have investigated the magnetic and electrical properties of multiferroic BiFe 1-x Mo x O 3 ceramics ( BFMO , x = 0.0%, 0.2%, 0.5% and 0.8%) prepared by the sol–gel method. The phase structure of BFMO samples were confirmed by X-ray diffraction. It was found that the substitution of Mo is responsible for the increasing of the magnetization in BFMO ceramics. Moreover, both dielectric and polarization-electric field properties suggest that the Mo doping could improve the dielectric and ferroelectric properties in BFMO ceramic.

Sign in / Sign up

Export Citation Format

Share Document