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PRODID:UW-Physics-TWaP
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UID:UW-Physics-Event-2975
DTSTART:20130404T100000
DURATION:PT1H0M0S
LOCATION:5310 Chamberlin
SUMMARY:Specific heat and magnetization studies of Dy<sub>2</sub>Ti<sub>2</sub>O<sub>7</sub>\, R. G. Herb Condensed Matter Seminar\, Jan Kycia\, University of Waterloo
DESCRIPTION:Dy<sub>2</sub>Ti<sub>2</sub>O<sub>7</sub> is a material with a pyrochlore lattice of corner-sharing tetrahedral. Crystal-field effects constrain the magnetic moments of the rare-earth ions to point along the axis connecting the centres of the two neighbouring tetrahedra. As a result\, the magnetic moments are highly frustrated and possess a ground state containing a large residual entropy similar to water ice. Because of this similarity to water ice\, the system is called a spin ice. Recently a very interesting perspective has been developed in which the thermal excitations in the magnetic spins are viewed as magnetic monopoles. In this talk\, I will review some of the progress in understanding spin ice and the monopole picture. I will discuss my group's results of specific heat\, ac susceptibility and magnetization measurements. 
URL:http://www.physics.wisc.edu/twap/view.php?id=2975
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