Zobrazeno 1 - 10
of 76
pro vyhledávání: '"Hakjoon Lee"'
Publikováno v:
Micromachines, Vol 13, Iss 3, p 416 (2022)
This paper proposes an effective method to manipulate the 2D motions of a magnetic small-scale robot (microrobot) within a relatively large working area using a triad of electromagnetic coils (TEC). The TEC is a combination of three identical circula
Externí odkaz:
https://doaj.org/article/80f682de64ce442e9956c19015febeea
Autor:
Kyung Jae Lee, Sangyeop Lee, Seul-Ki Bac, Seonghoon Choi, Hakjoon Lee, Jihoon Chang, Suho Choi, Phunvira Chongthanaphisut, Sanghoon Lee, X. Liu, M. Dobrowolska, J. K. Furdyna
Publikováno v:
Scientific Reports, Vol 8, Iss 1, Pp 1-9 (2018)
Abstract Magnetization reversal in a GaMnAs trilayer system consisting of two GaMnAs layers separated by a Be-doped GaAs spacer was investigated by magnetotransport measurements. The rotation of magnetization in the two GaMnAs layers is observed as t
Externí odkaz:
https://doaj.org/article/b93a2cedc02b442f827eaad225844747
Publikováno v:
Applied Sciences, Vol 11, Iss 21, p 10216 (2021)
Ultrasound (US) imaging is widely utilized as a diagnostic screening method, and deep learning has recently drawn attention for the analysis of US images for the pathological status of tissues. While low image quality and poor reproducibility are the
Externí odkaz:
https://doaj.org/article/890fb61d22b74595ab69b870c3c0e465
Autor:
Sangyeop Lee, Seul-Ki Bac, Seonghoon Choi, Hakjoon Lee, Taehee Yoo, Sanghoon Lee, Xinyu Liu, M. Dobrowolska, Jacek K. Furdyna
Publikováno v:
Scientific Reports, Vol 7, Iss 1, Pp 1-8 (2017)
Abstract We discuss the use of planar Hall effect (PHE) in a ferromagnetic GaMnAs film with two in-plane easy axes as a means for achieving novel logic functionalities. We show that the switching of magnetization between the easy axes in a GaMnAs fil
Externí odkaz:
https://doaj.org/article/903937e53e3b43b39af619b7a353c83d
Autor:
Hakjoon Lee, Jihoon Chang, Phunvira Chongthanaphisut, Sangyeop Lee, Seonghoon Choi, Seul-Ki Bac, Alviu R. Nasir, Sanghoon Lee, A. Pardo, Sining Dong, X. Li, X. Liu, J. K. Furdyna, M. Dobrowolska
Publikováno v:
AIP Advances, Vol 7, Iss 5, Pp 055809-055809-6 (2017)
We report a systemeatic investigation of magnetic anisotropy of quaternary GaMnAsP ferromagnetic semiconductor films by magneto-transport. Hall measurements showed a transition of the easy magnetization direction from in-plane to out-of plane with in
Externí odkaz:
https://doaj.org/article/86c08f2aa836442291c490563b62ce31
Autor:
Seul-Ki Bac, Hakjoon Lee, Sangyeop Lee, Seonghoon Choi, Taehee Yoo, Sanghoon Lee, X. Liu, J. K. Furdyna
Publikováno v:
AIP Advances, Vol 6, Iss 5, Pp 055806-055806-7 (2016)
Magnetic anisotropy of Fe films grown on (001) GaAs substrates using Ge buffer layers were investigated by planar Hall effect measurements. In addition to phenomena arising from dominant cubic symmetry of the Fe specimen, the study of angular depende
Externí odkaz:
https://doaj.org/article/b41f29dbee4b431a8f113ad52e1ac2fd
Autor:
Sunjae Chung, Sangyeop Lee, Taehee Yoo, Hakjoon Lee, J-H Chung, M S Choi, Sanghoon Lee, X Liu, J K Furdyna, Jae-Ho Han, Hyun-Woo Lee, Kyung-Jin Lee
Publikováno v:
New Journal of Physics, Vol 15, Iss 12, p 123025 (2013)
A striking multiple-step behavior has been observed in magnetoresistance measurements during magnetization reversal in anti-ferromagnetically coupled GaMnAs/GaAs:Be multilayers. This behavior arises from the splitting of the energy degeneracy of spin
Externí odkaz:
https://doaj.org/article/76892568ed5c48d1b9aeaca45ce336aa
Autor:
Hakjoon Lee, Hyungsuk Kim, Geuntae Im, Jong-Soo Lee, Ju-Young Park, Heung Jae Lee, Kibaek Lee
Publikováno v:
Applied Sciences, Vol 11, Iss 10216, p 10216 (2021)
Applied Sciences
Volume 11
Issue 21
Applied Sciences
Volume 11
Issue 21
Ultrasound (US) imaging is widely utilized as a diagnostic screening method, and deep learning has recently drawn attention for the analysis of US images for the pathological status of tissues. While low image quality and poor reproducibility are the
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::df467de1e224d64f1a5abf64ae1b2085
https://www.mdpi.com/2076-3417/11/21/10216
https://www.mdpi.com/2076-3417/11/21/10216
Autor:
Seul Ki Bac, Jacek K. Furdyna, Seonghoon Choi, Hakjoon Lee, Kyung Jae Lee, Xinyu Liu, Taehee Yoo, Sangyeop Lee, Sanghoon Lee, Margaret Dobrowolska, Kritsanu Tivakornsasithorn
Publikováno v:
Scientific Reports, Vol 8, Iss 1, Pp 1-11 (2018)
Scientific Reports
Scientific Reports
We report a detailed study of magnetization reversal in Fe/GaMnAs bilayers carried out by magnetotransport measurements. Specifically, we have used planar Hall resistance (PHR), which is highly sensitive to the direction of magnetization, and is ther
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::5a781f90458361ae1c5ebdc61703086f
http://link.springer.com/article/10.1038/s41598-018-28882-0
http://link.springer.com/article/10.1038/s41598-018-28882-0
Autor:
Seul Ki Bac, Sang Hoon Lee, Margaret Dobrowolska, Sangyeop Lee, Xiaofeng Liu, Jacek K. Furdyna, Seonghoon Choi, Hakjoon Lee
Publikováno v:
Journal of Electronic Materials. 47:4308-4313
Effects induced by a topological insulator Bi2Se3 on the magnetic properties of an adjacent GaMnAs film have been investigated using transport measurements. We observed three conspicuous effects in the GaMnAs layer induced by the proximity of the Bi2
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::1a7f6e69abd56a72df310d6acc11c161
https://doi.org/10.1007/s11664-018-6238-1
https://doi.org/10.1007/s11664-018-6238-1