A5027113252- Magnetic Properties of Alloys
- Magnetic Properties and Applications
- Metallic Glasses and Amorphous Alloys
- Magnetic and transport properties of perovskites and related materials
- Magnetic properties of thin films
- Thermal Expansion and Ionic Conductivity
- ZnO doping and properties
Korea Institute of Materials Science
2021-2024
Pusan National University
2023-2024
ThMn12-type Sm(FeV)12 magnets with high coercivity (Hc) demonstrate promising potential as alternative rare-earth-lean permanent magnets. This study delves into the microstructure and magnetic properties influenced by Sm content in SmxFe10V2 (x = 1.4-1.9) alloy. High-density SmFe10V2 bulks were prepared through a jet-milling process, followed high-pressure pressing heat treatment. Upon increasing beyond 1.6, heat-treated exhibited predominant ThMn12 phase, accompanied secondary phase –...
Anisotropic bulk magnets of ThMn12-type SmFe10V2 with a high coercivity (Hc) were successfully fabricated. Powders varying particle sizes prepared using the ball milling process, where size was controlled time. A decrease in Hc occurred heat-treated pressed from large-sized powders, while heavy oxidation excessively small leading to decomposition (1–12) phase. The highest 8.9 kOe achieved powders ball-milled for 5 h due formation grain boundary To improve maximum energy product ((BH)max),...
We successfully fabricated high-density Sm(Fe0.8Co0.2)12-2xTixVx (0.6 ≤ x 1.0) bulk magnets with high-purity ThMn12-type phase through the bulking of amorphous powder and subsequent annealing process. Depending on Ti–V pair concentrations, physical magnetic properties including lattice constants, crystallized phases, magnetizations (M), coercivities (Hc) samples were investigated. The highest maximum energy product, (BH)max, 7.293 MGOe was obtained = 0.6; however, its Hc limited to 3379 Oe...
The magnetic properties of ThMn12-type Fe-rich compounds were investigated by producing Sm(Fe0.8Co0.2)10Si2 ribbons. produced ribbons, with different conditions varying the melt-spinning conditions, characterized to investigate physical and properties. Weight fraction phase decreased from 94.5 57.1 wt. % as wheel speed increased 6.5 39 m/s, corresponding magnetizations coercivities substantially varied; coercivity up 0.175 T 0.058 increasing 26 their magnetization also 89.81 Am2/kg 105.58...
Si-doped Fe-rich compounds, i.e., Sm(Fe0.8Co0.2)11Ti + Six (x = 0, 0.5, and 1.0), with ThMn12-type structure in forms of ribbons bulks were fabricated using melt-spinning process high pressure pressing heat treatment processes. Physical magnetic properties the analyzed to investigate Si doping effects on Sm(Fe0.8Co0.2)11Ti. The Si-free found be amorphous, while small amount resulted dramatic crystallization ThMn12 phase. Coercivity increased increasing content from 43 3140 Oe, magnetization...
We explored the potential for an aging treatment to achieve high coercivity, of 0.859 MA/m, in a SmFe10V2 alloy with ThMn12-type structure. Bulk magnets were fabricated by sintering ball-milled powders, followed treatment. XRD and SEM analyses revealed that promotes formation Sm-rich grain boundary phase nano-scale thickness. The Sm content (~60–80 at.%) low Fe (~20–30 led non-ferromagnetism, enhancing coercivity isolating 1–12 grains weakening dipolar interaction between grains. temperature...
High purity antiperovskite-type Mn3−xGa1+xC (0 < x ≤ 0.3) alloys with varied Mn-concentration were prepared by using the solid state reaction method. The Curie temperature and magnetization of observed to oscillate as a function x. oscillations magnetic properties ascribed increasing distance between Mn–Mn atoms due dilution Mn in lattice oscillation parameters. period current Mn-diluted is much smaller than that films, indicating fundamentally different mechanisms from traditional...
The magnetic properties and phase transformation of Sm(Fe <inf xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">0.8</inf> Co xmlns:xlink="http://www.w3.org/1999/xlink">0.2</inf> ) xmlns:xlink="http://www.w3.org/1999/xlink">11</inf> X (X = Ga, V, B, Si, Ti) were investigated. ribbons produced by rapid solidification process, their analyzed using DSC VSM. It was confirmed that the melt-spun amorphous converted to ɑ-Fe phase, then TbCu...