A5024515156- Magnetic and transport properties of perovskites and related materials
- Advanced Condensed Matter Physics
- 2D Materials and Applications
- Magnetic Properties of Alloys
- Thermal Expansion and Ionic Conductivity
- Perovskite Materials and Applications
- Rare-earth and actinide compounds
- Quantum Dots Synthesis And Properties
- Multiferroics and related materials
- Electronic and Structural Properties of Oxides
- MXene and MAX Phase Materials
- Topological Materials and Phenomena
- Advanced Sensor and Energy Harvesting Materials
- Advanced Thermoelectric Materials and Devices
- Metal and Thin Film Mechanics
- Boron and Carbon Nanomaterials Research
- Shape Memory Alloy Transformations
- Chalcogenide Semiconductor Thin Films
- Iron-based superconductors research
- Superconductivity in MgB2 and Alloys
- Ferroelectric and Piezoelectric Materials
- Advanced X-ray and CT Imaging
- Radiation Dose and Imaging
- Gas Sensing Nanomaterials and Sensors
- Digital Radiography and Breast Imaging
Chungbuk National University
2021-2024
University of Indonesia
2019-2023
We have unambiguously identified 7 phonon modes by helicity-dependent polarized Raman spectroscopy for CVD-grown 2D Cr 2 S 3 together with variation of temperature.
Transition-metal dichalcogenides (TMDs) and metal halide perovskites (MHPs) have been investigated for various applications, owing to their unique physical properties excellent optoelectronic functionalities. TMD monolayers synthesized via chemical vapor deposition (CVD), which are advantageous large-area synthesis, exhibit low mobility prominent hysteresis in the electrical signals of field-effect transistors (FETs) because native defects. In this study, we demonstrate an increase by ∼170...
We investigated the phonon behavior of ZnO-buffered MgB
Series of Cu substituted manganese La0.7Ba0.291Ca0.009Mn1-xCuxO3 (x = 0 and 0.10) has been studied it affect in the structure. The powder sample was elaborated using sol-gel method. Samples were sintered at two different temperatures, 1173 K 1473 K. Structures all samples investigated by X-ray diffraction (XRD). Rietveld analysis x-ray shows that crystallize rhombohedral structure with R3c space group symmetry without any impurity phase. values tolerance factor (tG) substitution (tG 0.98486)...
We performed experimental and theoretical investigations into the Raman optical phonon modes of hexagonal FeTe (h-FeTe) nanosheets, which is a two-dimensional yet nonlayered ferromagnetic material. Prior studies have reported two peaks at around 120 138 cm–1. Our helicity-dependent experiments reveal novel features: (i) peak cm–1 is, in fact, composite closely spaced located 137 142 cm–1, (ii) an additional mode appears 158 In our analysis, however, three upper 137, 142, are inherently...
An energy transition to renewable sources is necessary due the scarcity of fossil fuels and their detrimental effects on environment. Water splitting process one practical effective way that does not occur spontaneously. This study investigates catalytic activity Cu-Zn-Sn (CZT) photocatalyst in hydrogen evolution oxygen reaction. The CZT deposited with varied electrolyte’s pH 6 9 indium tin oxide substrate at room temperature for 600 seconds. According X-ray diffraction patterns, there were...
Abstract In this research, structural engineering of lanthanum-manganate-based material was studied, starting with synthesizing La 0.7 (Ca 1-x Sr x ) 0.3 MnO 3 variation x=0; 0.1; 0.2; and using the sol-gel method as a microwave material. The effects substitution on stucture, size grain, microwave-absorbing properties were investigated in detail by various analytical methods. Using XRD (X-Ray Diffraction) showed that sample had single phase orthorombic structure (space group Pnma), 2 + ions...
Abstract The Bi substitution effect on the structure of La 0.3-x x Ca 0.7 MnO 3 (x = 0, 0.1) is observed through X-ray powder diffraction pattern. does not significantly change unit cell size itself. This due to 3+ ionic radius which relatively almost same as . Through Rietveld refinement, it confirmed that samples have orthorhombic with Pnma space group. Changes charge density distribution between atoms bonds are investigated using maximum entropy method (MEM). MEM based refined factors...
Perovskite-based on manganite La 0.7 (Sr 1-x Ca x ) 0.3 MnO 3 (x = 0, 0.3, 0.5, 0.7) has been successfully synthesized using by sol-gel method. All sample was characterized XRD (X-Ray Diffraction) obtain a single phase without impurities peak. The transition of crystal structure transition, lattice parameters, cell unit volume, size, bond length (Mn-O), and <Mn-O-Mn> angles caused 2+ ion substitution. Dopant concentration 0 - 0.5 shows that the rhombohedral with space group R-3c...
Microwave radiation can have harmful effects on our bodies. With increased exposure due to online activities, it is essential use absorber materials like perovskite manganate reduce radiation. In this study, La(1-x)Bax/2Srx/2Mn0.4Ti0.6O3 (x = 0, 0.1, and 0.3) was synthesized using the sol-gel method. X-ray diffraction (XRD) analysis revealed that two samples were multi-phased, LaMnO3 La2Ti2O7, formed, exhibiting a rhombohedral crystal structure (R -3 c). Morphological characterization of...
In this study, LaMnO3/Mn2O3 (LMO/MO) film are synthesized using electrodeposition method on SS 316L substrate. The preparation LMO/MO for was carried out with a concentration of La3+ and Mn2+ between 50 - 150 mM solution. Electrodeposition results show that currents variation 0.1; 0.5; 1; 2.5 mA, LaMnOHx MnOHx compounds have been formed. It is also observed an increasing current followed by in the composition La atom. good thickness sample occurs at 1 mA. then heated 800°C 4 hours. X-ray...
La0.7Sr0.2Ba0.1Mn1-xNixO3 (x = 0 and 0.1) perovskite was successfully prepared using sol-gel method. Morphological magnetic properties were investigated. Crystal structure of the sample show rhombohedral R-3c space group samples have formed a single phase without any impurities. SEM-EDS characterization shows changes in grain size confirms composition each element samples. Nickel doped causes decrease size, nickel is 1.829 µ m with 0.643 m. Hysteresis curves nickel-doped decreased as...
Abstract In this study, two CR receptors (Agfa CR-85X and Agfa CR-10X) DDR (Brivo DR-F Essenta) were characterized in terms of detector sensitivity image quality. An in-house phantom was specially designed to accommodate quality assessment for quick QC is tested as a purpose study. The reference quantitative aspect that used characterize the imaging units are correlation between Pixel Value receptor dose, whereas evaluation based on modules uses new proposed metrics (coefficient linearity,...
Abstract Bulk polycrystalline sample of La 0.8 Ag 0.2 MnO 3 has been successfully synthesized by the sol gel method. Structural, morphology, electrical properties and magnetoresistance investigated. Refinement results from XRD at room temperature showed a single-phase material with rhombohedral crystal structure R-3c space group. Electrical transport comparison experimental data theoretical model, undergo metal-insulator transition TM-I accompanying ferromagnetic-paramagnetic transition....
Bulk polycrystalline samples La 0.85-x Ba x Na 0.15 MnO 3 (x = 0, 0.05, 0.10 and 0.15) manganites were synthesized by the sol-gel route. The effect of Barium (Ba) existence on structural morphological was investigated X-ray diffraction (XRD) Scanning Electron Microscope (SEM). parameters obtained using Rietveld refinement XRD pattern. It revealed structures compounds have rhombohedral with R-3c space group without any impurities phase. Furthermore, several changes are found to exist due...
La 0.7 Ba 0.25 Nd 0.05 MnO 3 (LBNMO) compounds were synthesized using two different methods, namely are solid-state reaction (SS) and sol-gel (SG). All samples heat-treated at 1200 °C for 12 hours. The investigation on structural, morphological, magnetic properties was carried out by X-Ray Diffractometer (XRD), Scanning Electron Microscope (SEM), Vibrating Samples Magnetometer (VSM) room temperature. From the Rietveld refinement, both have formed a rhombohedral structure with an R-3c (167)...
Nanosized La 0.75 K 0.05 Ba Sr 0.15 MnO 3 manganite have been synthesized using sol-gel method. Afterwards, the samples were sintered at eight different temperature ranging from 650 to 1000 °C. Phase purity, crystal structure and morphology of sample examined X-Ray Diffractometer (XRD) Scanning Electron Microscope. It has found that higher sintering greatly affect phase purity crystallite size sample. Regardless temperature, all crystallized in rhombohedral with R-3c space group. The is...