A5060171785- Magnetic and transport properties of perovskites and related materials
- Multiferroics and related materials
- Advanced Condensed Matter Physics
- Magnetic Properties and Synthesis of Ferrites
- Ferroelectric and Piezoelectric Materials
- Electromagnetic wave absorption materials
- Electronic and Structural Properties of Oxides
- ZnO doping and properties
- Advanced Photocatalysis Techniques
- Thermal Expansion and Ionic Conductivity
- Copper-based nanomaterials and applications
- Shape Memory Alloy Transformations
- Iron oxide chemistry and applications
- Physics of Superconductivity and Magnetism
- Rare-earth and actinide compounds
- Transition Metal Oxide Nanomaterials
- Gas Sensing Nanomaterials and Sensors
- Geomagnetism and Paleomagnetism Studies
- Quantum Dots Synthesis And Properties
- Advanced Thermoelectric Materials and Devices
- Metallic Glasses and Amorphous Alloys
- Dielectric properties of ceramics
- Theoretical and Computational Physics
- Advanced Antenna and Metasurface Technologies
- Metamaterials and Metasurfaces Applications
Hankuk University of Foreign Studies
2015-2024
Yong In University
2004-2016
Highly crystalline SnFe<sub>2</sub>O<sub>4</sub> nanoparticles with high saturation magnetization and superior chlortetracycline degradation efficiency was developed using a one-pot solvothermal method.
Abstract Polycrystalline Ca 2 Fe 2− x Al O 5 ( = 0‐1.4) samples were prepared by conventional solid‐state reactions. Their crystalline/electronic structures and magnetic properties characterized in detail. Powder X‐ray diffraction analyses revealed that the crystallized orthorhombic brownmillerite‐type with occurrence of Pcmn ‐ Ibm phase separation region between 0.4 0.6. The results obtained from analyzing Raman scattering X‐ray‐absorption fine‐structure spectra also indicated this...
We prepared orthorhombic La0.7−xYxCa0.3MnO3 samples (x = 0, 0.04, 0.06, and 0.08) by conventional solid-state reaction then studied their magnetic properties magnetocaloric (MC) effect based on magnetization versus temperature magnetic-field measurements, M(T, H). The experimental results revealed that an x increase in reduced the ferromagnetic-paramagnetic transition (TC) from 260 K (for 0) to ∼126 0.08). Around TC, maximum magnetic-entropy changes for a variation interval H 50 kOe are...
Epitaxial SrRuO3 thin films were grown on both (100) and (111) SrTiO3 substrates with atomically flat surfaces that are required to grow high-quality of materials under debate. The following notable differences observed in the (111)-oriented films: (1) slightly different growth mode, (2) approximately 10 K higher ferromagnetic transition temperature, (3) better conducting behavior relative resistivity ratio, than (100)c-oriented films. Together reported results (110) substrate, physical...
Electronic structures of Sr_2FeMoO_6 (SFMO) and Ba_2FeMoO_6 (BFMO) double perovskites have been investigated using the Fe 2p->3d resonant photoemission spectroscopy (PES) Cooper minimum in Mo 4d photoionization cross section. The states close to Fermi level are found strongly mixed Mo-Fe t_{2g} character, suggesting that valence is far from pure 3+. 2p_{3/2} XAS spectra indicate mixed-valent Fe^{3+}-Fe^{2+} configurations, larger Fe^{2+} component for BFMO than SFMO, a kind exchange...