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DTSTAMP:20260416T190609
DTSTART:20130204T113000
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URL:https://murmitoyen.com/events/vanille/udem/detail/166147
LOCATION:Université de Montréal - Pavillon J.-Armand-Bombardier\, 5155\, 
 chemin de la rampe \, Montréal\, QC\, Canada\, H3T 2B2
SUMMARY:Magnetic Pyrochlore Oxides: The End of the Ising Enslavement
DESCRIPTION:Michel Gingras\, Department of Physics and Astronomy\, Univer
 sity of Waterloo\, Waterloo\, ON\, CanadaMagnetic materials have long off
 ered physicists the opportunity to study some of the general principles th
 at govern collective phenomena in Nature. For example\, different material
 s possess different effective spin symmetry\, allowing experimentalists an
 d theorists to explore the role of combined spin symmetry and spatial dime
 nsionality on the spontaneous development\, or not\, of long-range order. 
 Because of the wide variety of interesting and complex behaviors that they
  display\,  highly frustrated magnetic pyrochlore oxides have attracted m
 uch interest for over thirty years. Since the mid 1990s\, significant prog
 ress has been made in understanding pyrochlore oxides with magnetic moment
 s having one spin components\, or Ising systems. This is the case of the p
 opular 'spin ices'. More recently\, combined experimental and theoretical 
 efforts have been directed at understanding pyrochlores described by two c
 omponent spins (XY systems) and three component spins (Heisenberg systems)
 . These two classes appear as rich as the Ising spin ices\, displaying int
 riguing phenomena such as spin liquid behavior\, order-by-disorder and per
 sistent spin dynamics down to very low-temperature. In this seminar\, I wi
 ll present an overview of the current understanding of some of the most i
 nteresting non-Ising pyrochlores that has emerged over past couple of yea
 rs.Site web du groupe du Prof. GingrasCette conférence est présentée pa
 r le RQMP Versant Nord du Département de physique de l'Université de Mo
 ntréal et le Département de génie physique de Polytechnique Montréal.
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