Article
Physics, Applied
Dae-Yun Kim, Min-Ho Park, Yong-Keun Park, Ji-Sung Yu, Joo-Sung Kim, Duck-Ho Kim, Byoung-Chul Min, Sug-Bong Choe
APPLIED PHYSICS LETTERS
(2018)
Article
Physics, Applied
Joo-Sung Kim, Yong-Keun Park, Hyun-Seok Whang, Jung-Hyun Park, Byoung-Chul Min, Sug-Bong Choe
APPLIED PHYSICS LETTERS
(2019)
Article
Engineering, Electrical & Electronic
Hee Sung Lee, Seung Hun Kim, Tae Hwan Jang, Hee-Gyum Park, Byoung-Chul Min, Seung-Young Park, Chul Soon Park
IEEE TRANSACTIONS ON MAGNETICS
(2019)
Article
Multidisciplinary Sciences
Daeseong Choe, Mi-Jin Jin, Shin-Ik Kim, Hyung-Jin Choi, Junhyeon Jo, Inseon Oh, Jungmin Park, Hosub Jin, Hyun Cheol Koo, Byoung-Chul Min, Seokmin Hong, Hyun-Woo Lee, Seung-Hyub Baek, Jung-Woo Yoo
NATURE COMMUNICATIONS
(2019)
Article
Materials Science, Multidisciplinary
Eun-Sang Park, Byoung-Chul Min, Hyun Cheol Koo, Kyoung-Whan Kim, Kyung-Jin Lee
CURRENT APPLIED PHYSICS
(2019)
Article
Multidisciplinary Sciences
Gyung-Min Choi, Jung Hyun Oh, Dong-Kyu Lee, Seo-Won Lee, Kun Woo Kim, Mijin Lim, Byoung-Chul Min, Kyung-Jin Lee, Hyun-Woo Lee
NATURE COMMUNICATIONS
(2020)
Article
Materials Science, Multidisciplinary
Yong-Keun Park, Joo-Sung Kim, Yune-Seok Nam, Seyyoung Jeon, Jung-Hyun Park, Kyoung-Whan Kim, Hyun-Woo Lee, Byoung-Chul Min, Sug-Bong Choe
NPG ASIA MATERIALS
(2020)
Article
Materials Science, Multidisciplinary
Hee Young Kwon, Kyung Mee Song, Juyoung Jeong, Ah-Yeon Lee, Seung-Young Park, Jeehoon Kim, Changyeon Won, Byoung-Chul Min, Hye Jung Chang, Jun Woo Choi
NPG ASIA MATERIALS
(2020)
Article
Multidisciplinary Sciences
Inseon Oh, Jungmin Park, Daeseong Choe, Junhyeon Jo, Hyeonjung Jeong, Mi-Jin Jin, Younghun Jo, Joonki Suh, Byoung-Chul Min, Jung-Woo Yoo
Summary: The molecule-based magnetic film for spin thermoelectric applications offers various synthetic routes, weak spin-lattice interaction, and low thermal conductivity, enabling effective energy harvesting from waste heat. By electrochemically depositing thin films on chromium electrodes at room temperature and demonstrating extremely low heat loss, this new class of magnet paves the way for sustainable recycling of ubiquitous waste heat.
NATURE COMMUNICATIONS
(2021)
Article
Materials Science, Multidisciplinary
Eun-Sang Park, Byoung-Chul Min, Hyun Cheol Koo, Kyoung-Whan Kim, Kyung-Jin Lee
Summary: This study theoretically investigates the spin-orbit torque on a ferromagnet within a ferromagnet(1)/normal metal/ferromagnet(2) trilayer, analyzing the effects caused by the spin Hall and spin swapping of ferromagnet(1). The results provide an analytical expression of the spin-orbit torque in trilayers, which may be valuable for quantifying the spin Hall and spin swapping effects of ferromagnets, and for interpreting SOT experiments using ferromagnets as spin current sources.
CURRENT APPLIED PHYSICS
(2021)
Article
Physics, Multidisciplinary
Hee-Gyum Park, Deok Hyun Yun, Won Min Jeong, OukJae Lee, Byoung-Chul Min
Summary: The study experimentally investigated the oscillatory interlayer exchange coupling (IEC) strength in synthetic antiferromagnets with various Ir/(Ru, Mo or W)/Ir composite spacers. It was found that the Ir insertion layer not only affects the magnitude of IEC but also the peak position in perpendicular synthetic antiferromagnets. The thickness dependence of composite spacers offers a possibility to tune both J(ex) and spacer thickness for SAF-based spintronic applications.
JOURNAL OF THE KOREAN PHYSICAL SOCIETY
(2021)
Article
Physics, Applied
Yune-Seok Nam, Dae-Yun Kim, Yong-Keun Park, Ji-Sung Yu, Seong-Hyub Lee, Duck-Ho Kim, Byoung-Chul Min, Sug-Bong Choe
Summary: Here, researchers propose an experimental scheme to determine the strength of the Heisenberg exchange interaction in ultrathin magnetic films. The scheme analyzes the chirality transition between different types of domain walls under an in-plane magnetic field and estimates the exchange stiffness constant based on this analysis. The scheme, which utilizes the magneto-optical Kerr effect, is applicable to ultrathin magnetic films down to a few atomic layers.
APPLIED PHYSICS LETTERS
(2022)
Article
Physics, Applied
Deok Hyun Yun, TaeHyuk Kwon, Ki-Hyuk Han, Dong Joon Lee, Seokmin Hong, Hyun Cheol Koo, Byoung-Chul Min, Byeong-Kwon Ju, OukJae Lee
Summary: In this study, the magnetic properties of Pt/CoFeB/MgO layers were investigated using the angle-resolved spin-torque ferromagnetic resonance method. The measurements provided reasonable magnetic parameters, but an unusual value was obtained for the interfacial spin transparency. The thickness dependence of the Lande g-factor for CoFeB indicated that the interfacial spin-orbit coupling played a role in determining the enhancement of magnetic damping. Furthermore, the azimuthal asymmetry in the magnetic system may not be related to unconventional spin polarization. These results contribute to the understanding of various magnetic properties and current-induced spin-torques in heavy-metal/ferromagnet bilayers.
JOURNAL OF APPLIED PHYSICS
(2022)
Article
Physics, Applied
Ji-Sung Yu, Dae-Yun Kim, Joon Moon, Seong-Hyub Lee, Jun-Young Chang, Duck-Ho Kim, Byoung-Chul Min, Sug-Bong Choe
Summary: Dzyaloshinskii-Moriya interaction (DMI) plays a crucial role in the formation and stability of chiral magnetic objects and also determines their roughness. Experimental observations on magnetic multilayer films reveal the relationship between DMI and the roughness of chiral domain-walls. This study provides a quantitative method to determine the DMI-induced effective field, which is an important parameter for the stability and dynamic characteristics of chiral domain-walls.
APPLIED PHYSICS LETTERS
(2022)
Article
Materials Science, Multidisciplinary
Dae-Yun Kim, Min-Ho Park, Yong-Keun Park, Joo-Sung Kim, Yune-Seok Nam, Duck-Ho Kim, Soong-Geun Je, Hyeok-Cheol Choi, Byoung-Chul Min, Sug-Bong Choe
NPG ASIA MATERIALS
(2018)