Опубликована: Окт. 18, 2024
Язык: Английский
Acta Physica Sinica, Год журнала: 2025, Номер 74(6), С. 0 - 0
Опубликована: Янв. 1, 2025
M-type strontium ferrite has attracted widespread attention in the field of permanent magnet materials due to its unique magnetic properties, dielectric performance, and thermal stability. However, compared with rare-earth magnets such as Nd<sub>2</sub>Fe<sub>14</sub>B, (SrFe<sub>12</sub>O<sub>19</sub>) possess relatively lower comprehensive which limits their application range. The effects Ca-Co (Zn) doping on electronic structure, mechanical properties are systematically investigated by first-principles plane-wave pseudopotential method based density functional theory (DFT), combined generalized gradient approximation (GGA + <i>U</i>) paper. calculated results indicate that co-doped systems exhibit good structural stability properties. In Ca-Zn structures, conductivity system is enhanced because substitution trivalent Fe ions at 4<i>f</i><sub>1</sub> site divalent Zn ions. co-doping increases total moment system, while magnetocrystalline anisotropy energy decreases. Co single been improved, indicating can effectively enhance ferrite. study also analyzed mechanisms effect indicated decrease was mainly influence <i>d</i><sub>xy</sub> <i>d</i><sub>x</sub><sup>2</sup><sub>-y</sub><sup>2</sup> orbital electrons Co<sup>3+</sup> ion 2<i>b</i> site. reduction influenced Fe-3<i>d</i> orbitals site, system. These provide theoretical guidance for subsequent research modification
Язык: Английский
Процитировано
0
Applied Energy, Год журнала: 2025, Номер 383, С. 125391 - 125391
Опубликована: Янв. 28, 2025
Язык: Английский
Процитировано
0
Advanced Materials, Год журнала: 2024, Номер unknown
Опубликована: Окт. 31, 2024
Abstract Triboelectric‐electromagnetic hybrid generator (TEHG) has emerged as an effective technology for mechanical energy harvesting. However, the independent operation of triboelectric nanogenerator (TENG) and electromagnetic (EMG), along with tribo‐materials wear magnetic field divergence, constrain device's overall performance. To address these challenges, a synergistically enhanced TEHG (SE‐TEHG) is proposed based on multifunctional amorphous alloy. Following detailed material analyses, Fe 72 Si 8 B 20 selected synergistic layer its low surface roughness, high Vickers‐hardness, structure, magnetization. Compared to Al, this not only boosts TENG's output current retention rate by 28.75% 85.24%, but also improves EMG's power 51.05%. In constructing self‐powered system TEHG, significant impedance discrepancy exists between harvester (with matched impendence 16 MΩ TENG 110 kΩ EMG) application end. Without management circuits, demonstrated variable achieves utilization efficiency that 2.98 times greater than conventional constant system. The integration materials realize strong‐coupling generators, combined customization systems, set milestone in efficient harvesting utilization.
Язык: Английский
Процитировано
0
Опубликована: Окт. 18, 2024
Язык: Английский
Процитировано
0