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Crystal growth and characterization of the CMR compound La1.2(Sr,Ca)1.8Mn2O7 |
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| Authors: | M. Vel zquez, C. Haut, B. Hennion,A. Revcolevschi |
| Affiliation: | a Laboratoire de Physico-Chimie de l’Etat Solide, UMR 8648, Université de Paris-Sud, 91405 Orsay Cedex, France b Laboratoire Léon Brillouin, CEA-Saclay, 91191 Gif-sur-Yvette, France |
| Abstract: | High-quality centimeter-sized single crystals of La1.2Sr1.8−yCayMn2O7 (0.0y0.2) were successfully grown using a floating zone method associated with an image furnace. We present the growth conditions together with a characterization of the single crystals by means of optical and electron microscopy, EDX and ICPAES analysis, DTA-TGA measurements and redox titration, X-ray powder diffraction, Laue X-ray back-reflection and neutron diffraction. We also stress the main aspects of the complex thermodynamical and kinetic behaviors of these compounds. |
| Keywords: | Colossal magnetoresistance (CMR) La1.2(Sr,Ca)1.8Mn2O7 Single crystal Floating zone method Incongruency Nonconservativity Metastability |
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