A5035436477- Physics of Superconductivity and Magnetism
- Magnetic properties of thin films
- Superconductivity in MgB2 and Alloys
- Superconducting Materials and Applications
- 2D Materials and Applications
- Topological Materials and Phenomena
- Graphene research and applications
- Magnetic confinement fusion research
- High Entropy Alloys Studies
- Metal and Thin Film Mechanics
- Intermetallics and Advanced Alloy Properties
- ZnO doping and properties
- Quantum and electron transport phenomena
- Thermal Expansion and Ionic Conductivity
- Advanced Materials Characterization Techniques
- Child Development and Digital Technology
- Food Safety and Hygiene
- Mobile Health and mHealth Applications
- Magnetic and transport properties of perovskites and related materials
- MXene and MAX Phase Materials
- Boron and Carbon Nanomaterials Research
- Machine Learning in Materials Science
- Iron-based superconductors research
- Nutrition, Health and Food Behavior
- High-Temperature Coating Behaviors
Pohang University of Science and Technology
2022-2024
Ministry of Food and Drug Safety
2021
Gumi University
2016
Objectives The purpose of this study was to explore the use mobile applications about pregnancy, birth, and child care among pregnant women review characteristics, contents, credibility used by these women. Methods This cross-sectional conducted using a survey method. One hundred ninety-three participated in study. questionnaire developed examine pattern reasons for pregnancy-related application usage. 47 apps participants were reviewed categorized based on functions developers. information...
We present a study on the magnetic domain configuration in van der Waals ferromagnet CrGeTe3 using vector-field cryogenic force microscopy. Our investigation demonstrates influence of fields strength and angle configuration, showing coexistence striped spike-like domains. This contributes to understanding impact uniaxial anisotropy ferromagnets, offering insights into stabilizing different patterns.
We investigate the Larkin–Ovchinnikov instability in epitaxial NbN microbridges, focusing on impact of structural homogeneity vortex dissipation. Analyzing current–voltage curves under various magnetic fields and temperatures reveals velocities up to 6 km/s. These decrease with an increasing field stabilize into a plateau near critical temperature. The extracted recombination times (τ) range around 10 ps temperature, indicating involvement thermally activated phonons. Furthermore, thinner...
Owing to the high resolution of magnetic force microscopes (MFMs) operating at low temperatures and high-applied fields, they can be employed study various phenomena observed in topological materials superconductors. In this study, we constructed a low-temperature MFM equipped with 2-2-9-T vector magnet three-axis fiber-optic alignment system. The device enables situ calibration scanner as well optimizes intensity sensitivity interferometer signal. A massive homebuilt vibration isolation...
Abstract We report on the vortex instability in superconducting/ferromagnetic (FM) bilayers. Samples consisting of a 23 nm thick Mo 2 N superconducting layer with capping Co, Fe 20 i80 , or FePt ferromagnets were grown by sputtering at room temperature silicon (100). Our study reveals that critical velocity these bilayers is significantly influenced thickness FM layers rather than specific magnetic domain structure. When comparing samples 10 and 50 thickness, we observe notable increase...
This study explores the effect of Al-buffered layers on crystal structure and superconductivity MgB2. The unique Mg1-xAlxB2 phase formed at a thickness 190 nm is promising technique for thin-film fabrication. upper critical field (Hc2) suppressed, which corresponds to change in interband scattering, as confirmed by X-ray diffraction extended absorption fine results. By contrast, thicker samples with Al-buffer layer, contain MgB2 top surface, show an improvement Hc2 compared pure sample...
We investigate the magnetic domain behavior of bulk Fe3GaTe2, a van der Waals (vdW) ferromagnet characterized by Curie temperature (Tc) 350–380 K and significant perpendicular anisotropy (PMA). Using force microscopy, we present evolution domains during cooling from Tc to 300 K, analyze images along hysteresis loop at 4.2 K. Our observations reveal strong temperature-dependent structure. From room Tc, observe coexistence stripe, bubble, surface spike domains. In contrast, in zero-field...
Abstract We present a study on the superconducting properties of 300 nm thick NbTi thin films grown by co-sputtering silicon substrates at room temperature. The samples exhibit Nb (50 %) and Ti chemical composition, revealing polycrystalline structure textured along (110) axis body-centered cubic structure. measured critical temperature ( T c ) was 9.65 K, upper field extrapolated to zero reached approximately 15 T, resulting in coherence length 4.7 nm. penetration depth determined through...
We investigate the superconducting properties of 80 nm thick amorphous MoNx films fabricated via reactive sputtering on silicon and flexible commercial polyimide substrates. The samples are grown at room temperature using with a gas mixture N2 Ar. mechanical deformation tolerance for is evaluated by comparing critical (Tc) current density (Jc) when attached to cooper surfaces varying curvatures. exhibit Tc 8.2 K 7.9 polyimide. Our results demonstrate significant enhancement in flux pinning...
We report on the discovery of a macroscopic quantum phenomenon, referred to as supernonlocality, in Weyl state—a topological metal exhibiting both surface and bulk transport. Supernonlocality is characterized by comparable magnitude nonlocal resistance local resistance, indicating global transport property. Remarkably, we observe colossal decay length 0.6 mm, surpassing other semimetals terms phenomena. This unprecedented behavior found be positively correlated with system's nonlinear...
We report on the impact of magnetic domain stripe configuration critical velocity vortices in superconducting/ferromagnetic bilayers. Using a 23 nm thick Mo$_2$N film, covered by 48 FePt layer with tunable nanosized striped domains, we demonstrate that flux instability at low fields depends orientation stripes. When stripes are perpendicular to applied current and act as vortex guides, values reach 5 km/s, duplicating those found when configured parallel current, creating winding paths. Our...
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