Zobrazeno 1 - 10
of 37
pro vyhledávání: '"Oh, Se Hyeok"'
Autor:
Park, Hyeon-Jong, Jeong, Yunboo, Oh, Se-Hyeok, Go, Gyungchoon, Oh, Jung Hyun, Kim, Kyoung-Whan, Lee, Hyun-Woo, Lee, Kyung-Jin
Publikováno v:
Phys. Rev. B 101, 144431 (2020)
We numerically compute current-induced spin-transfer torques for antiferromagnetic domain walls, based on a linear response theory in a tight-binding model. We find that, unlike for ferromagnetic domain wall motion, the contribution of adiabatic spin
Externí odkaz:
http://arxiv.org/abs/2001.07351
Publikováno v:
Phys. Rev. B 100, 174403 (2019)
We investigate ferrimagnetic domain wall dynamics induced by circularly polarized spin waves theoretically and numerically. We find that the direction of domain wall motion depends on both the circular polarization of spin waves and the sign of net s
Externí odkaz:
http://arxiv.org/abs/1905.03521
Autor:
Okuno, Takaya, Kim, Duck-Ho, Oh, Se-Hyeok, Kim, Se Kwon, Hirata, Yuushou, Nishimura, Tomoe, Ham, Woo Seung, Futakawa, Yasuhiro, Yoshikawa, Hiroki, Tsukamoto, Arata, Tserkovnyak, Yaroslav, Shiota, Yoichi, Moriyama, Takahiro, Kim, Kab-Jin, Lee, Kyung-Jin, Ono, Teruo
Publikováno v:
Nat. Electron. 2, 389 (2019)
Antiferromagnetic materials are outstanding candidates for next generation spintronic applications, because their ultrafast spin dynamics makes it possible to realize several orders of magnitude higher-speed devices than conventional ferromagnetic ma
Externí odkaz:
http://arxiv.org/abs/1903.03251
Publikováno v:
Phys. Rev. B 99, 024424 (2019)
We theoretically and numerically investigate magnetic domain wall dynamics in a nanowire of easy-cone magnet. The easy-cone domain wall exhibits several distinguishing dynamic features in comparison to the easy-axis domain wall. The features of easy-
Externí odkaz:
http://arxiv.org/abs/1810.02216
Autor:
Hirata, Yuushou, Kim, Duck-Ho, Kim, Se Kwon, Lee, Dong-Kyu, Oh, Se-Hyeok, Kim, Dae-Yun, Nishimura, Tomoe, Okuno, Takaya, Futakawa, Yasuhiro, Yoshikawa, Hiroki, Tsukamoto, Arata, Tserkovnyak, Yaroslav, Shiota, Yoichi, Moriyama, Takahiro, Choe, Sug-Bong, Lee, Kyung-Jin, Ono, Teruo
Charged particles exhibit the Hall effect in the presence of magnetic fields. Analogously, ferromagnetic skyrmions with non-zero topological charges and finite fictitious magnetic fields exhibit the skyrmion Hall effect, which is detrimental for appl
Externí odkaz:
http://arxiv.org/abs/1809.00415
Autor:
Kim, Duck-Ho, Okuno, Takaya, Kim, Se Kwon, Oh, Se-Hyeok, Nishimura, Tomoe, Hirata, Yuushou, Futakawa, Yasuhiro, Yoshikawa, Hiroki, Tsukamoto, Arata, Tserkovnyak, Yaroslav, Shiota, Yoichi, Moriyama, Takahiro, Kim, Kab-Jin, Lee, Kyung-Jin, Ono, Teruo
Publikováno v:
Phys. Rev. Lett. 122, 127203 (2019)
We investigate the Gilbert damping parameter for rare earth (RE)-transition metal (TM) ferrimagnets over a wide temperature range. Extracted from the field-driven magnetic domain-wall mobility, the Gilbert damping parameter was as low as 0.0072 and w
Externí odkaz:
http://arxiv.org/abs/1806.04881
Autor:
Sekiguchi, Koji, Lee, Seo-Won, Sukegawa, Hiroaki, Sato, Nana, Oh, Se-Hyeok, McMichael, Robert D., Lee, Kyung-Jin
Publikováno v:
NPG Asia Materials 9, e392 (2017)
The information carrier of modern technologies is the electron charge whose transport inevitably generates Joule heating. Spin-waves, the collective precessional motion of electron spins, do not involve moving charges and thus avoid Joule heating. In
Externí odkaz:
http://arxiv.org/abs/1706.10057
Autor:
Oh, Se-Hyeok, Kim, Se Kwon, Lee, Dong-Kyu, Go, Gyungchoon, Kim, Kab-Jin, Ono, Teruo, Tserkovnyak, Yaroslav, Lee, Kyung-Jin
Publikováno v:
Phys. Rev. B 96, 100407 (2017)
We theoretically study the dynamics of ferrimagnetic domain walls in the presence of Dzyaloshinskii-Moriya interaction. We find that an application of a DC magnetic field can induce terahertz spin-wave emission by driving ferrimagnetic domain walls,
Externí odkaz:
http://arxiv.org/abs/1706.00549
Autor:
Kim, Kab-Jin, Kim, Se Kwon, Tono, Takayuki, Oh, Se-Hyeok, Okuno, Takaya, Ham, Woo Seung, Hirata, Yuushou, Kim, Sanghoon, Go, Gyoungchoon, Tserkovnyak, Yaroslav, Tsukamoto, Arata, Moriyama, Takahiro, Lee, Kyung-Jin, Ono, Teruo
Antiferromagnetic spintronics is an emerging research field which aims to utilize antiferromagnets as core elements in spintronic devices. A central motivation toward this direction is that antiferromagnetic spin dynamics is expected to be much faste
Externí odkaz:
http://arxiv.org/abs/1703.07515
Autor:
Shiino, Takayuki, Oh, Se-Hyeok, Haney, Paul M., Lee, Seo-Won, Go, Gyungchoon, Park, Byong-Guk, Lee, Kyung-Jin
Publikováno v:
Phys. Rev. Lett. 117, 087203 (2016)
We theoretically investigate dynamics of antiferromagnetic domain walls driven by spin-orbit torques in antiferromagnet/heavy metal bilayers. We show that spin-orbit torques drive antiferromagnetic domain walls much faster than ferromagnetic domain w
Externí odkaz:
http://arxiv.org/abs/1604.01473