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Enhanced Electromagnetic Wave Absorption in Hexaferrite/LSMO Bilayers: Optimization of Structural Design Using a High Frequency Software Simulation
Jae-Hee Heo, Tae-Woo Lee, Young-Min Kang, Sang-Min Lee
Korean J. Met. Mater. 2024;62(11):868-878.   Published online 2024 Nov 5
DOI: https://doi.org/10.3365/KJMM.2024.62.11.868

Abstract
In this study, the electromagnetic (EM) wave absorption properties of a two-layered structure composed of La0.7Sr0.3MnO3-epoxy (10 wt.%) (LSMO) and SrFe9.5Co1.25Ti1.25O19-epoxy (10 wt.%) (SFCTO), both exhibiting distinct high-frequency magnetic and dielectric properties, were investigated using a High Frequency Simulation Software (HFSS) simulation tool. LSMO had a high dielectric constant (ε'..... More

                
Microwave Absorption Characteristics of M<sup>2+, 3+</sup> (M = Mn<sup>3+</sup>, Zn<sup>2+</sup>, Ni<sup>2+</sup>)-substituted Sr<sub>3</sub>Co<sub>2</sub>Fe<sub>24</sub>O<sub>41</sub> Hexaferrite Composites
M2+, 3+ (M = Mn3+, Zn2+, Ni2+)이 치환된 Sr3Co2Fe24O 41 hexaferrite 복합체의 전자기파 흡수 특성
Jae-Hee Heo, Young-Min Kang
허재희, 강영민
Korean J. Met. Mater. 2024;62(8):645-655.   Published online 2024 Jul 31
DOI: https://doi.org/10.3365/KJMM.2024.62.8.645

Abstract
Mn, Zn, Ni-substituted Z-type hexaferrites, Sr3Co2Fe24O41 (Sr3Co2Fe24-xMnxO41, Sr3Co2-yZnyFe24O41, Sr3Co1-zNizZnFe24O41), were prepared by sol-gel synthesis processes and their high-frequency magnetic, dielectric and electromagnetic (EM) wave absorption characteristics were investigated. Substituting Mn for Fe by x = 0.5 maintained the single-phase Z phase while shifting the μ' , μ″ spectra towards lower..... More

                
Synthesis, Characterization, and Electromagnetic Wave Absorbing Properties of La<sub>0.7</sub>Sr<sub>0.3</sub>MnO<sub>3</sub>
La0.7Sr0.3MnO3의 합성, 특성 평가 및 전자기파 흡수 특성
Jae Hee Heo, Young-Min Kang
허재희, 강영민
Korean J. Met. Mater. 2023;61(3):183-189.   Published online 2023 Feb 24
DOI: https://doi.org/10.3365/KJMM.2023.61.3.183

Abstract
Perovskite manganese La0.7Sr0.3MnO3 (LSMO) powders were prepared by sol-gel synthesis and calcination in the temperature (T ) range of 500~1200 o C and their structures and electromagnetic (EM) wave absorption properties were investigated. X-ray diffraction (XRD) analysis revealed that the crystalline perovskite phase can be formed at T ≥ 600 oC...... More

                   Web of Science 3  Crossref 3
Fabrication and Electromagnetic wave absorption Properties of Co-Cu-substituted Ni-Zn Spinel Ferrite-epoxy Composites
Co, Cu가 치환된 Ni-Zn 스피넬 페라이트-에폭시 복합체의 제조와 전자기파 흡수 특성
Ji-Eun Yoo, Young-Min Kang
유지은, 강영민
Korean J. Met. Mater. 2020;58(12):887-895.   Published online 2020 Dec 4
DOI: https://doi.org/10.3365/KJMM.2020.58.12.887

Abstract
Spinel ferrites (Ni0.5Zn0.5)1-x-yCoxCuyFe2O4, (x = 0 and y = 0, x = 0.2 and y = 0, x = 0.1 and y = 0.1, x = 0 and y = 0.2) were prepared by sol-gel method and post-annealed at 1100 oC. The grain growth of the sample is very sensitive..... More

                   Web of Science 5  Crossref 2
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