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Visualization of Magnetic Domains in Electrical Steel Using High-Resolution Dark-Field Imaging
Youngju Kim, Jongyul Kim, Daniel Seth Hussey, Oh Youl Kwon, Seung Wook Lee
Korean J. Met. Mater. 2019;57(6):352-359.   Published online 2019 May 16
DOI: https://doi.org/10.3365/KJMM.2019.57.6.352

Abstract
Electrical steel is a soft magnetic steel material used in electric devices such as transformers and motors. The performance of these electric devices is primarily related to the magnetic properties of electrical steel, and the assessment of the magnetic properties of electrical steel has been considered an important topic. We..... More

                        
A Study on the Soft Magnetic Properties and Compaction Density of Fe-based Nanocrystalline Powder Cores Mixed with Permalloy Powders
퍼멀로이 분말이 혼합된 철계 나노결정립 분말코어의 성형밀도와 연자성 특성에 관한 연구
Jeong Hoon Shin, Young Mok Jeong, Keun Yong Sohn, Won-Wook Park
신정훈, 정영목, 손근용, 박원욱
Korean J. Met. Mater. 2017;55(9):645-650.   Published online 2017 Aug 30
DOI: https://doi.org/10.3365/KJMM.2017.55.9.645

Abstract
In this paper, the soft magnetic properties and compaction density of Fe-Si-B-Nb-Cu nanocrystalline powder cores, mixed with two kinds of permalloy powders (Ni70Fe30 or Ni50Fe50), have been closely studied. Permalloy powders having an average diameter of 4μm were added in the range of 5 to 15 wt%, and the powder..... More

      
Electromagnetic Noise Absorption by Conductive Grid Films Prepared by Screen Printing Process
스크린 인쇄공정으로 제조한 그리드 전도막의 전자기 노이즈 흡수특성
Min-Sung Kim, Sung-Soo Kim
김민성, 김성수
Korean J. Met. Mater. 2017;55(8):576-580.   Published online 2017 Aug 1
DOI: https://doi.org/10.3365/KJMM.2017.55.8.576

Abstract
To realize focused design near-field conduction noise absorbers for sub-GHz frequencies, this study proposes screen-printed conductive grid films. The films’ advantages include large-scale production and easy control of electrical properties. A conductive grid film with a resistance value of approximately 70 Ω was screen printed on polyimide film substrate and..... More

      
Calculation of Inductance, Capacitance, and Microwave Absorbance of Modified Square Loop Frequency Selective Surface
변형된 사각 루프 주파수 선택 표면의 인덕턴스, 커패시턴스 계산 및 전파흡수특성
Tian Liu, Sung-Soo Kim
류전, 김성수
Korean J. Met. Mater. 2017;55(6):412-418.   Published online 2017 Jun 1
DOI: https://doi.org/10.3365/KJMM.2017.55.6.412

Abstract
The square loop (SL) is the typical pattern of a frequency selective surface (FSS) with high inductance (L) and capacitance (C). In this study, modified patterns including split square loop FSS (SSL-FSS) and I-type FSS (I-FSS) are proposed, and their L and C values were estimated using the equivalent circuit..... More

      
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