Study of magnetism and its dynamics in the geometrically frustrated magnet Nd2Sn2O7 by the backscattering technique
In the pyrochlore lattice systems the magnetic ions sit on a lattice of corner sharing regular tetrahedra. A large variety of ground states is observed due to geometrical frustration effects. The actual ground state depends on the balance between several types of interactions, e.g. exchange interactions between nearest and further neighbours, the dipolar interaction and the single ion anisotropy. This balance turns out to be extremely subtle since for instance the actual ground states observed in Tb2Ti2O7 and Tb2Sn2O7 are very different while only the Ti ion is substituted for Sn which are both non-magnetic. In the series of the pyrochlore stannates, Nd2Sn2O7 has so far been the object of few investigations. It presents a well marked thermodynamic phase transition at 0.91 K. A neutron powder scattering is scheduled at ILL in order to determine its magnetic structure. Here we propose to study this system by the backscattering technique in order to determine its dynamical properties. This will help in finding out the key parameters which are relevant to explain the nature of the actual ground state adopted by a geometrically frustrated magnet.
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DALMAS DE REOTIER Pierre; BERTIN Alexandre; FAK Bjorn; Bernhard Frick; SEYDEL Tilo and YAOUANC Alain. (2013). Study of magnetism and its dynamics in the geometrically frustrated magnet Nd2Sn2O7 by the backscattering technique. Institut Laue-Langevin (ILL) doi:10.5291/ILL-DATA.4-01-1309
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