Crystal and magnetic structure of some Yb2Ti2O7 pyrochlores.
Pyrochlores A2B2O7, a superstructure of defect fluorite (A,B)O3.5, similarly to the perovskite family of oxides, allow a wide range of cations to be introduced both to A and B sites. This remarkable tolerance to chemical substitutions makes pyrochlores a very versatile class of materials that exhibits a number of interesting physical properties. When appropriately doped, Ti-pyrochlores can be converted in good mixed or ionic conductors. However, on heating these phases show complex disordering in oxygen subllatice, which may be strongly affected by presence of dopants. Therefore we propose to study magnetic and crystal structure of several doped Ti pyrochlores in order to clear up the magnetic moment ordering at low temperature and if cation mixing between A and B sites and possible anion disordering take place at elevated temperature.
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NUNEZ Pedro; CUELLO Gabriel and SAVVIN Stanislav. (2012). Crystal and magnetic structure of some Yb2Ti2O7 pyrochlores.. Institut Laue-Langevin (ILL) doi:10.5291/ILL-DATA.5-31-2221
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