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Phase stability in the LnCa2Mn2O7 (Ln = Pr, Nd, Sm and Gd) Ruddlesden-Popper series

Shah, N., Green, M.A., Neumann, D.A. (2002) Phase stability in the LnCa2Mn2O7 (Ln = Pr, Nd, Sm and Gd) Ruddlesden-Popper series. Journal of Physics and Chemistry of Solids, 63 (9). pp. 1779-1786. ISSN 0022-3697. (doi:10.1016/S0022-3697(01)00265-7) (The full text of this publication is not currently available from this repository. You may be able to access a copy if URLs are provided)

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Abstract

The synthesis of the Ruddlesden-Popper series, LnCa2Mn2O7, (Ln = Pr, Nd, Sm and Gd) is described and their structure and electronic properties investigated. The reduction in size of the A-site cation causes an increase in the distortion of their orthorhombic structures (space group Cmcm). All of these compounds form with a perovskite impurity, the amount of which increases on reduction of the cation size. The synthesis temperature also alters the amount of perovskite impurity in the phase, but only to a lower limit, implying the perovskite phase is intrinsic to the material and that a phase equilibrium exists between the layered Ruddlesden-Popper and perovskite phases, which is controlled by the cation size. The magnetic susceptibility show transitions characteristic of the perovskite phase, therefore little direct information can be obtained about the Ruddlesden-Popper phases, except that ferromagnetism is not observed in any of these materials. © 2002 Published by Elsevier Science Ltd.

Item Type: Article
DOI/Identification number: 10.1016/S0022-3697(01)00265-7
Additional information: Unmapped bibliographic data: LA - English [Field not mapped to EPrints] J2 - J Phys Chem Solids [Field not mapped to EPrints] AD - Royal Institution of Great Britain, 21 Albemarle Street, London W1X 4BS, United Kingdom [Field not mapped to EPrints] AD - Christopher Ingold Laboratories, Department of Chemistry, University College London, 20 Gordon Street, London WC1H 0AJ, United Kingdom [Field not mapped to EPrints] AD - Center for Neutron Research, National Institute of Standards and Technology, Gaithersburg, MD 20899, United States [Field not mapped to EPrints] DB - Scopus [Field not mapped to EPrints]
Uncontrolled keywords: A. Magnetic materials, D. Magnetic properties, D. Phase equilibria, Electronic properties, Ferromagnetism, Impurities, Magnetic susceptibility, Perovskite, Phase equilibria, Positive ions, Synthesis (chemical), Phase stability, Lanthanum compounds
Subjects: Q Science > QC Physics > QC173.45 Condensed Matter
Q Science > QD Chemistry > QD478 Solid State Chemistry
Divisions: Faculties > Sciences > School of Physical Sciences > Functional Materials Group
Depositing User: Giles Tarver
Date Deposited: 21 Oct 2015 15:25 UTC
Last Modified: 29 May 2019 16:11 UTC
Resource URI: https://kar.kent.ac.uk/id/eprint/51136 (The current URI for this page, for reference purposes)
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