Y
Yul-Seong Kim
Researcher at Pusan National University
Publications - 66
Citations - 781
Yul-Seong Kim is an academic researcher from Pusan National University. The author has contributed to research in topics: Superconductivity & Magnetization. The author has an hindex of 12, co-authored 65 publications receiving 751 citations.
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Journal ArticleDOI
Ferromagnetism in Mn-doped Ge
Sunglae Cho,Sungyoul Choi,Soon Cheol Hong,Yunki Kim,John B Ketterson,Bong-Jun Kim,Yul-Seong Kim,Jung Hyun Jung +7 more
TL;DR: In this paper, the lattice constant increases linearly with Mn concentration due to the larger Mn atomic radius compared with Ge, strongly indicating that Mn ions are being incorporated into the host Ge lattice.
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Room-temperature ferromagnetism in (Zn1-xmnx)GeP2 semiconductors
Sunglae Cho,Sungyoul Choi,Gi Beom Cha,Soon Cheol Hong,Yunki Kim,Yu-Jun Zhao,Arthur J Freeman,John B Ketterson,Bomin Kim,Yul-Seong Kim,Byung Chun Choi +10 more
TL;DR: In this article, the discovery of a room-temperature ferromagnetic semiconductor in chalcopyrite was reported, which is consistent with the predictions of full-potential linearized augmented plane wave total energy calculations.
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Ferromagnetism in Cr-doped Ge
Sungyoul Choi,Soon Cheol Hong,Sunglae Cho,Yunki Kim,John B Ketterson,Chi Un Jung,Kungwon Rhie,Bong-Jun Kim,Yul-Seong Kim +8 more
TL;DR: In this article, a Cr-doped bulk Ge single crystal using the vertical gradient solidification method was fabricated and the material showed ferromagnetic ordering at 126 K, as determined from temperature-dependent magnetization and resistance measurements.
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Ferromagnetic properties in Cr, Fe-doped Ge single crystals
Sungyoul Choi,Soon Cheol Hong,Sunglae Cho,Yunki Kim,John B Ketterson,Chi Un Jung,Kungwon Rhie,Bong-Jun Kim,Yul-Seong Kim +8 more
TL;DR: In this article, the vertical gradient solidification method was used to construct a Cr and Fe-doped bulk bulk Ge single crystal using a single crystal model and the measured magnetic moment per Cr was 0.83μB at 5 K and Fe 0.05Ge 0.95 showed ferromagnetic ordering at 233 K.
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Improved output coupling efficiency of a ZnS:Mn thin-film electroluminescent device with addition of a two-dimensional SiO2 corrugated substrate
TL;DR: In this article, the effects of adding a 2D SiO2 corrugated substrate onto a ZnS:Mn thin-film electroluminescence (EL) device on its EL properties were investigated.