Spin dynamics in the frustrated XY antiferromagnet Er2Ti2O7
Er2Ti2O7 is a pryochlore XY antiferromagnet, a parent compound of the spins ices (Ho2Ti2O7 and Dy2Ti2O7) where the anisotropy is of uniaxial type. In zero field, Er2Ti2O7 orders below 1.1 K probably by an order-by-disorder mechanism, which is still debated. Recent measurements suggest the existence of a quantum critical point promoted by the magnetic field at H=1.5 T. To shed light on this physics, we propose to study the spin dynamics for different field values across the critical point by means of inelastic neutron scattering.
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I. MIREBEAU; BONVILLE Pierre; GUITTENY Solene; MUTKA Hannu; PETIT Sylvain and ROBERT Julien. (2013). Spin dynamics in the frustrated XY antiferromagnet Er2Ti2O7. Institut Laue-Langevin (ILL) doi:10.5291/ILL-DATA.4-03-1695
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