| Description |
In the last few years our solid state chemistry ORSAY group has carried out crystal growth experiments in various correlated electron oxide systems using the image-furnace floating-zone technique developed in the laboratory, and has studied various physical properties of the resulting cm-size crystals.
The studies have mostly concerned oxides such as low dimensionality cuprates (copper chain systems such as SrCuO2, Sr2CuO3, and pure and doped spin ladder Sr14Cu24O41), CMR manganites (pure and substituted La1-xSrxMnO3, (La,Sr)3Mn2O7) and, also geometrically frustrated magnetic compounds of pyrochlore structure such as Yb2Ti2O7 or Gd2Ti2O7.
Crystal growth conditions (growth rate, atmospheres, oxygen partial pressure…) will be briefly reviewed for these various compounds and data from neutron diffraction experiments, carried out to assess crystalline perfection will be presented. Some physical properties will be briefly reviewed.
Possible segregation of dopants during growth of some of the above compounds as well as oxygen non-stoichiometry will be discussed; influence of this segregation and of oxygen non-stoichiometry on the modification of physical properties will be analyzed.
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