BEGIN:VCALENDAR VERSION:2.0 METHOD:PUBLISH PRODID:-//Missouri State University/Calendar of Events//EN CALSCALE:GREGORIAN X-WR-TIMEZONE:America/Chicago BEGIN:VTIMEZONE TZID:America/Chicago BEGIN:DAYLIGHT TZOFFSETFROM:-0600 TZOFFSETTO:-0500 DTSTART:20070311T020000 RRULE:FREQ=YEARLY;BYMONTH=3;BYDAY=2SU TZNAME:CDT END:DAYLIGHT BEGIN:STANDARD TZOFFSETFROM:-0500 TZOFFSETTO:-0600 DTSTART:20071104T020000 RRULE:FREQ=YEARLY;BYMONTH=11;BYDAY=1SU TZNAME:CST END:STANDARD END:VTIMEZONE BEGIN:VEVENT UID:4f4fd968-5484-44a9-88e1-0065c76ef278.224215@calendar.missouristate.edu CREATED:20230130T155343Z LAST-MODIFIED:20230130T155343Z LOCATION:Kemper Hall 204 SUMMARY:PAMS Seminar: "Designer Magnet with Fundamental and Practical Impl ications" by Dr. Deepak Singh DESCRIPTION:Dr. Deepak SinghDepartment of Physics & AstronomyUniversity of Missouri\n\n\nAbstract:Magnetic honeycomb lattice is a highly intriguing physical system\, which has drawn lot of attention in both the bulk and the two-dimensional nanostructured specimens. Study of the artificially d esigned nanoscopic honeycomb lattice\, artificial honeycomb spin ice\, is argued to unravel many novel facets of topological magnetic charge physi cs. In addition to the inherent geometrical frustration\, the competing n ature of exchange interactions (J1\, J2 terms) in thermally tunable artif icial magnetic honeycomb lattice renders a disorder-free environment for the exploration of new quantum mechanical phenomenon or gorund state. Our research has revealed the development of highly unexpected magnetic char ge liquid state in the quasi-classical system. The magnetic charge liquid state is characterized by the massively degenerate ground state of magne tic charges that remain unperturbed to high magnetic field application\, and a perpetual dynamic state in the absence of thermal fluctuation at lo w temperature. Typically\, the dynamic process in a nanostructured magnet is mediated by the finite size domain wall motion\, which requires magne tic field or electric current application. Contrary to this notion\, the dynamic state in 2D magnetic honeycomb lattice is owed to the self-propel led magnetic charge kinetics with very fast relaxation rate\, ~ 20 ps. Su ch relaxation rate is typically found in bulk material of atomistic origi n. It leads us to argue that the magnetic charge is a quantum mechanical ‘macroscopic’ quasi-particle entity\, which was never envisaged before. T he new finding can have strong implication to the spintronics research\, as evidenced from the recently demonstrated magnetic diode effect due to magnetic charge mediation in permalloy honeycomb lattice. X-ALT-DESC;FMTTYPE=text/html:<html><head><title></title></head><body><p><b >Dr. Deepak Singh</b><br><strong>Department of Physics &amp\; Astronomy<b r></strong><strong>University of Missouri</strong></p>\n<p>Abstract:<br>M agnetic honeycomb lattice is a highly intriguing physical system\, which has drawn lot of attention in both the bulk and the two-dimensional nanos tructured specimens. Study of the artificially designed nanoscopic honeyc omb lattice\, artificial honeycomb spin ice\, is argued to unravel many n ovel facets of topological magnetic charge physics. In addition to the in herent geometrical frustration\, the competing nature of exchange interac tions (J1\, J2 terms) in thermally tunable artificial magnetic honeycomb lattice renders a disorder-free environment for the exploration of new qu antum mechanical phenomenon or gorund state. Our research has revealed th e development of highly unexpected magnetic charge liquid state in the qu asi-classical system. The magnetic charge liquid state is characterized b y the massively degenerate ground state of magnetic charges that remain u nperturbed to high magnetic field application\, and a perpetual dynamic s tate in the absence of thermal fluctuation at low temperature. Typically\ , the dynamic process in a nanostructured magnet is mediated by the finit e size domain wall motion\, which requires magnetic field or electric cur rent application. Contrary to this notion\, the dynamic state in 2D magne tic honeycomb lattice is owed to the self-propelled magnetic charge kinet ics with very fast relaxation rate\, ~ 20 ps. Such relaxation rate is typ ically found in bulk material of atomistic origin. It leads us to argue t hat the magnetic charge is a quantum mechanical ‘macroscopic’ quasi-parti cle entity\, which was never envisaged before. The new finding can have s trong implication to the spintronics research\, as evidenced from the rec ently demonstrated magnetic diode effect due to magnetic charge mediation in permalloy honeycomb lattice.</p></body></html> DTSTART;TZID=America/Chicago:20230209T160000 DTEND;TZID=America/Chicago:20230209T170000 SEQUENCE:0 URL:https://physics.missouristate.edu/seminars.htm CATEGORIES:Public,Alumni,Current Students,Faculty,Future Students,Staff END:VEVENT END:VCALENDAR