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SUMMARY:Strain-tuning of the magnetic compounds Sr3Ru2O7\, CeAuSb2\, and P
 dCrO2 - Clifford Hicks. Max Planck Institute for Chemical Physics of Solid
 s\, Dresden\, Germany
DTSTART:20170518T130000Z
DTEND:20170518T140000Z
UID:TALK72619@talks.cam.ac.uk
CONTACT:Helen Verrechia
DESCRIPTION:Using piezoelectric-based apparatus and specialised sample mou
 nting\, we have developed the capability to compress samples uniaxially by
  up to ~1%\, while maintaining high strain homogeneity and precise in situ
  tunability. Unlike hydrostatic pressure\, uniaxial pressure can be used t
 o lift native lattice symmetries in a tunable\, reversible way. In this ta
 lk\, I will discuss application of this technique to the magnetic compound
 s Sr3Ru2O7\, CeAuSb2\, and PdCrO2. Sr3Ru2O7 shows field-induced magnetic o
 rder\, that appears to consist of perpendicular spin density waves whose r
 elative amplitude can be tuned through uniaxial pressure. The heavy-fermio
 n antiferromagnet CeAuSb2 shows a similar strain-temperature phase diagram
  to Sr3Ru2O7\, but arguably with much stronger effects from local behavior
 . Finally\, the magnetic order of the triangular compound PdCrO2\, which o
 n the unstrained lattice is the 120° antiferromagnetic order seen when He
 isenberg spins interact antiferromagnetically on a triangular lattice\, ap
 pears to be substantially altered by lifting the native triangular lattice
  symmetry.
LOCATION:Mott Seminar Room (531)\, Cavendish Laboratory\, Department of Ph
 ysics
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