BEGIN:VCALENDAR VERSION:2.0 PRODID:IEEE vTools.Events//EN CALSCALE:GREGORIAN BEGIN:VTIMEZONE TZID:America/Chicago BEGIN:DAYLIGHT DTSTART:20240310T030000 TZOFFSETFROM:-0600 TZOFFSETTO:-0500 RRULE:FREQ=YEARLY;BYDAY=2SU;BYMONTH=3 TZNAME:CDT END:DAYLIGHT BEGIN:STANDARD DTSTART:20241103T010000 TZOFFSETFROM:-0500 TZOFFSETTO:-0600 RRULE:FREQ=YEARLY;BYDAY=1SU;BYMONTH=11 TZNAME:CST END:STANDARD END:VTIMEZONE BEGIN:VEVENT DTSTAMP:20240322T142617Z UID:74C6AC01-2986-4231-B7BD-A97D3FAF9112 DTSTART;TZID=America/Chicago:20240321T110000 DTEND;TZID=America/Chicago:20240321T120000 DESCRIPTION:Zoom Link: [https://argonne.zoomgov.com/j/1617260288?p wd=Z3kzM kI4L0QzS2ZzZ0VvOUorL1lCQT09](https://events.vtools.ieee.org/tego_/event/ed it/Zoom%20Link:%20https:/argonne.zoomgov.com/j/1617260288?p%20wd=Z3kzMkI4L 0QzS2ZzZ0VvOUorL1lCQT09)\n\nSpeaker: Professor Kab-Jin Kim\n\nDepartment o f Physics\,\n\nKAIST\, Daejeon 34141\, Republic of Korea\n\nDate: Thursday \, March 21\, 2024\nTime: 11:00 AM CDT\n\nAbstract\n\nMagnetic solitons\, such as magnetic domain walls\, skyrmions\, vortices\, and Bloch lines\, r epresent distinctive spin configurations within magnets and play a crucial role in modern magnetism and spintronics [1]. Investigating the dynamics of these solitons is pivotal\, as it not only unveils new physics [2\,3] b ut also propels the development of magnetic devices [4\,5]. Concurrently\, spin transport is another essential facet of spintronics research. Effort s to generate pure spin currents have spurred investigations into various spin orbit effects\, including the spin Hall effect and Rashba effect\, le ading to intriguing physical phenomena and diverse magnetoresistances [6]. \n\nIn this presentation\, I will share insights from my journey in spintr onics research\, focusing on uncovering novel phenomena in spin dynamics a nd transport. The first part focuses on spin dynamics across a broad dynam ic range\, particularly emphasizing research on magnetic domain wall dynam ics. Discussions encompass the creep and hopping dynamics governing slow r egimes [7] and extend to the fast and ultrafast dynamics achievable in eme rging magnetic materials\, such as ferrimagnets and antiferromagnets [8]. In the second part\, I will present our recent findings on spin transport phenomena. We employed THz time-domain spectroscopy to reveal the fundamen tal magnetotransport characteristics in magnetic materials undergoing phas e transitions [9\,10]. Additionally\, we will demonstrate how the utilizat ion of magnetic phase transitions can lead to the generation of large spin current bursts\, the underlying mechanism of which transcends the orthodo x spin torque theory [11]. If time permits\, I will introduce our recent r esults on magnonic studies\, covering topics such as the control of magnon handedness in ferrimagnets [12]\, gate-controlled coherent magnon frequen cy modulation [13]\, magnetic-field manipulation of thermal phonons via ma gnon-phonon coupling [14]\, and nonlinear magnon-magnon coupling in synthe tic antiferromagnets [15].\n\n[1] H.B. Braun\, Adv. Phys.\, 61\, 1 (2012)\ n[2] I.M. Miron et al.\, Nature\, 476\, 189 (2011)\; L. Liu et al.\, Scien ce\, 336\, 555 (2012)\;\n[3] S. Emori et al.\, Nat. Mater.\, 12\, 611 (201 3)\; K.-S. Ryu et al.\, Nat. Nanotech.\, 8\, 527 (2013)\n[4] S. Parkin et al.\, Nat. Nanotech.\, 10\, 195 (2015)\n[5] Z. Luo et al.\, Nature\, 579\, 214 (2020)\n[6] A. Manchon et al.\, Rev. Mod. Phys.\, 91\, 035004 (2019)\ n[7] K.-J. Kim et al.\, Nature\, 458\, 740 (2009)\; J.-C. Lee et al.\, Phy s. Rev. Lett.\, 107\, 067201 (2012)\; M. Song et al.\, Adv. Mater.\, 34\, 2203275 (2022)\n[8] Y. Yoshimura et al.\, Nat. Phys. 7\, 157 (2016)\; K.-J . Kim et al.\, Nat. Mater. 16\, 1187 (2017)\n[9] J.-H. Park et al.\, Sci. Rep. 11\, 20884 (2021)\n[10] J.-H. Park et al.\, “Unraveling the origin of conductivity change in FeRh phase transitions”\, In preparation\n[11] T. Lee et al.\, “observation of longitudinal spin pumping”\, under re view\n[12] C. Kim et al.\, Nat. Mater. 19\, 980 (2020)\n[13] J.-G. Choi et al.\, Nat. Comm. 13\, 3783 (2022)\n[14] G.-H. Lee et al.\, “Magnetic Co ntrol of Phonon Transport in Magnetic Insulator Thulium Iron Garnet”\, I n preparation\n[15] M. You et al.\, “Nonlinear magnonic interaction in a synthetic antiferromagnet”\, In preparation\n\nBiography:\n\nProf. Kab- Jin Kim is an Associate Professor in the Department of Physics at KAIST in South Korea. He earned his BA and Ph.D. degrees from Seoul National Unive rsity before joining KAIST in 2016\, following 5.5 years of post-doctoral and assistant professorial work at Kyoto University. His research focuses on experimental studies in spintronics\, particularly in magnetic domain w all dynamics and their applications. With over 108 published papers\, his current interests lie in investigating spin dynamics and transport in exte nded material systems\, encompassing ferrimagnets and antiferromagnets. Ad ditionally\, Prof. Kim is an author of a widely-received book for general audiences and a sought-after public speaker\, with his lectures\, includin g those on YouTube\, collectively amassing over 10 million views.\n\nCo-sp onsored by: IEEE Chicago\, IEEE NTC Young Professionals\n\n9700 S Cass Ave \, Lemont\, Illinois\, United States\, 60439\, Virtual: https://events.vto ols.ieee.org/m/410377 LOCATION:9700 S Cass Ave\, Lemont\, Illinois\, United States\, 60439\, Virt ual: https://events.vtools.ieee.org/m/410377 ORGANIZER:yili@anl.gov SEQUENCE:2 SUMMARY:(Mar. 21\, 2024)Spin dynamics and transport in emerging magnetic ma terials URL;VALUE=URI:https://events.vtools.ieee.org/m/410377 X-ALT-DESC:Description: <br /><p>Zoom Link: <a href="https://events.vtools. ieee.org/tego_/event/edit/Zoom%20Link:%20https:/argonne.zoomgov.com/j/1617 260288?p%20wd=Z3kzMkI4L0QzS2ZzZ0VvOUorL1lCQT09">https://argonne.zoomgov.co m/j/1617260288?p wd=Z3kzMkI4L0QzS2ZzZ0VvOUorL1lCQT09</a></p>\n<p><strong>S peaker: Professor Kab-Jin Kim</strong></p>\n<p><strong>Department of Physi cs\, </strong></p>\n<p><strong>KAIST\, Daejeon 34141\, Republic of Korea</ strong></p>\n<p><strong>Date: Thursday\, March 21\, 2024</strong><br><stro ng>Time: 11:00 AM CDT</strong></p>\n<p><strong>Abstract</strong></p>\n<p>M agnetic solitons\, such as magnetic domain walls\, skyrmions\, vortices\, and Bloch lines\, represent distinctive spin configurations within magnets and play a crucial role in modern magnetism and spintronics [1]. Investig ating the dynamics of these solitons is pivotal\, as it not only unveils n ew physics [2\,3] but also propels the development of magnetic devices [4\ ,5]. Concurrently\, spin transport is another essential facet of spintroni cs research. Efforts to generate pure spin currents have spurred investiga tions into various spin orbit effects\, including the spin Hall effect and Rashba effect\, leading to intriguing physical phenomena and diverse magn etoresistances [6].</p>\n<p><br>In this presentation\, I will share insigh ts from my journey in spintronics research\, focusing on uncovering novel phenomena in spin dynamics and transport. The first part focuses on spin d ynamics across a broad dynamic range\, particularly emphasizing research o n magnetic domain wall dynamics. Discussions encompass the creep and hoppi ng dynamics governing slow regimes [7] and extend to the fast and ultrafas t dynamics achievable in emerging magnetic materials\, such as ferrimagnet s and antiferromagnets [8]. In the second part\, I will present our recent findings on spin transport phenomena. We employed THz time-domain spectro scopy to reveal the fundamental magnetotransport characteristics in magnet ic materials undergoing phase transitions [9\,10]. Additionally\, we will demonstrate how the utilization of magnetic phase transitions can lead to the generation of large spin current bursts\, the underlying mechanism of which transcends the orthodox spin torque theory [11]. If time permits\, I will introduce our recent results on magnonic studies\, covering topics s uch as the control of magnon handedness in ferrimagnets [12]\, gate-contro lled coherent magnon frequency modulation [13]\, magnetic-field manipulati on of thermal phonons via magnon-phonon coupling [14]\, and nonlinear magn on-magnon coupling in synthetic antiferromagnets [15].</p>\n<p>[1] H.B. Br aun\, Adv. Phys.\, 61\, 1 (2012)<br>[2] I.M. Miron et al.\, Nature\, 476\, 189 (2011)\; L. Liu et al.\, Science\, 336\, 555 (2012)\;<br>[3] S. Emori et al.\, Nat. Mater.\, 12\, 611 (2013)\; K.-S. Ryu et al.\, Nat. Nanotech .\, 8\, 527 (2013)<br>[4] S. Parkin et al.\, Nat. Nanotech.\, 10\, 195 (20 15)<br>[5] Z. Luo et al.\, Nature\, 579\, 214 (2020)<br>[6] A. Manchon et al.\, Rev. Mod. Phys.\, 91\, 035004 (2019)<br>[7] K.-J. Kim et al.\, Natur e\, 458\, 740 (2009)\; J.-C. Lee et al.\, Phys. Rev. Lett.\, 107\, 067201 (2012)\; M. Song et al.\, Adv. Mater.\, 34\, 2203275 (2022)<br>[8] Y. Yosh imura et al.\, Nat. Phys. 7\, 157 (2016)\; K.-J. Kim et al.\, Nat. Mater. 16\, 1187 (2017)<br>[9] J.-H. Park et al.\, Sci. Rep. 11\, 20884 (2021)&nb sp\;<br>[10] J.-H. Park et al.\, &ldquo\;Unraveling the origin of conducti vity change in FeRh phase transitions&rdquo\;\, In preparation<br>[11] T. Lee et al.\, &ldquo\;observation of longitudinal spin pumping&rdquo\;\, un der review<br>[12] C. Kim et al.\, Nat. Mater. 19\, 980 (2020)<br>[13] J.- G. Choi et al.\, Nat. Comm. 13\, 3783 (2022)<br>[14] G.-H. Lee et al.\, &l dquo\;Magnetic Control of Phonon Transport in Magnetic Insulator Thulium I ron Garnet&rdquo\;\, In preparation<br>[15] M. You et al.\, &ldquo\;Nonlin ear magnonic interaction in a synthetic antiferromagnet&rdquo\;\, In prepa ration</p>\n<p><strong>Biography: </strong></p>\n<p>Prof. Kab-Jin Kim is a n Associate Professor in the Department of Physics at KAIST in South Korea . He earned his BA and Ph.D. degrees from Seoul National University before joining KAIST in 2016\, following 5.5 years of post-doctoral and assistan t professorial work at Kyoto University. His research focuses on experimen tal studies in spintronics\, particularly in magnetic domain wall dynamics and their applications. With over 108 published papers\, his current inte rests lie in investigating spin dynamics and transport in extended materia l systems\, encompassing ferrimagnets and antiferromagnets. Additionally\, Prof. Kim is an author of a widely-received book for general audiences an d a sought-after public speaker\, with his lectures\, including those on Y ouTube\, collectively amassing over 10 million views.</p> END:VEVENT END:VCALENDAR