Ghosh, Nilotpal and Elizabeth, Suja and Bhat, HL and Subanna, GN and Sahana, M (2003) Crystal growth, structural and magnetic properties of $Nd_1\hspace{2mm}_−_xPb_xMnO_3$. In: Journal of Magnetism and Magnetic Materials, 256 (1-3). pp. 286-292.
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Abstract
Single crystals of $Nd_1\hspace{2mm}_−_xPb_xMnO_3$ with various dopant concentrations (x=0.15, 0.2, 0.3, 0.4 and 0.5) are grown by high temperature solution growth technique using $PbO-PbF_2$ flux. Charge-to-flux ratio and $PbO-PbF_2$composition are optimized to grow good quality crystals at lower temperature. When the $PbO:PbF_2$ratio is close to the eutectic composition, crystal yield has improved. Powder X-ray diffraction studies reveal that the crystals exhibit tetragonal symmetry. Super-lattice structure obtained from transmission electron microscopic investigations suggests lattice doubling. Magnetization measurements show that the Curie temperature $(T_C)$ increases with dopant concentration. A second transition observed below 30 K is probably due to ordering of the $Nd^3^+$ ions. The magnetization does not saturate up to a field of 50 kOe at 20 K suggesting a non-collinear (canting) ordering of Nd-spins.
Item Type: | Journal Article |
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Publication: | Journal of Magnetism and Magnetic Materials |
Publisher: | Elsevier |
Additional Information: | Copyright of this article belongs to Elsevier. |
Keywords: | Manganites;CMR;Single crystal;Super structure;Magnetization |
Department/Centre: | Division of Chemical Sciences > Materials Research Centre Division of Physical & Mathematical Sciences > Physics |
Date Deposited: | 01 Jun 2006 |
Last Modified: | 19 Sep 2010 04:28 |
URI: | http://eprints.iisc.ac.in/id/eprint/7230 |
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