BEGIN:VCALENDAR
VERSION:2.0
PRODID:www.dresden-science-calendar.de
METHOD:PUBLISH
CALSCALE:GREGORIAN
X-MICROSOFT-CALSCALE:GREGORIAN
X-WR-TIMEZONE:Europe/Berlin
BEGIN:VTIMEZONE
TZID:Europe/Berlin
X-LIC-LOCATION:Europe/Berlin
BEGIN:DAYLIGHT
TZNAME:CEST
TZOFFSETFROM:+0100
TZOFFSETTO:+0200
DTSTART:19810329T030000
RRULE:FREQ=YEARLY;INTERVAL=1;BYMONTH=3;BYDAY=-1SU
END:DAYLIGHT
BEGIN:STANDARD
TZNAME:CET
TZOFFSETFROM:+0200
TZOFFSETTO:+0100
DTSTART:19961027T030000
RRULE:FREQ=YEARLY;INTERVAL=1;BYMONTH=10;BYDAY=-1SU
END:STANDARD
END:VTIMEZONE
BEGIN:VEVENT
UID:DSC-4023
DTSTART;TZID=Europe/Berlin:20121030T164000
SEQUENCE:1351755395
TRANSP:OPAQUE
DTEND;TZID=Europe/Berlin:20121030T181000
URL:https://dresden-science-calendar.de/calendar/de/detail/4023
LOCATION:TUD Recknagel-Bau\, Haeckelstraße 1-501069 Dresden
SUMMARY:Garst: Chiral magnets do the twist
CLASS:PUBLIC
DESCRIPTION:Speaker: P D Dr. Markus Garst\nInstitute of Speaker: Universit
 ät zu Köln\nTopics:\nPhysik\n Location:\n  Name: TUD Recknagel-Bau (Klei
 ner Hörsaal C213)\n  Street: Haeckelstraße 1-5\n  City: 01069 Dresden\n 
  Phone: \n  Fax: \nDescription: Chiral magnets can gain energy by twisting
  the magnetization on a length scale determined by spin - orbit coupling r
 esulting in twisted magnetic textures like helices. Particularly interesti
 ng are the cubic chiral magnets encompassing the metals MnSi\, FeGe\, the 
 se miconductor Fe 1 - x Co x Si and the insulator Cu 2 OSeO 3 . The magnet
 ic transition in these compounds corresponds to a weak crystallization pro
 cess where the reciprocal lattice vector of the magnetic order is inversel
 y proportional to the twist length. Consequentl y\, the transition from th
 e paramagnet to the helimagnetic order - a quasi one - dimensional magneti
 c crystal - is driven first - order by fluctuations. At finite magnetic fi
 eld\, a quasi two - dimensional magnetic crystal is realized consisting of
  a regular arran gement of so - called skyrmions. The topological nature o
 f these objects gives rise to an efficient coupling to spin - currents res
 ulting in observable spintronic phenomena at low current densities. As the
  spin of the itinerant electrons constantly adapts to t he skyrmion textur
 e\, its orbital motion experiences an artificial magnetic field of one flu
 x quantum per skyrmion that contributes to the Hall effect. If the applied
  electric current exceeds a threshold value\, the depinning of skyrmions r
 esults in a moving magnetic texture that induces an artificial electric fi
 eld via Faraday's law of induction. The resulting emergent artifical elect
 rodynamics promises to become an interesting playground for novel spintron
 ic phenomena.
DTSTAMP:20260610T160739Z
CREATED:20121012T090741Z
LAST-MODIFIED:20121101T073635Z
END:VEVENT
END:VCALENDAR