New magnetic materials obtained by ion-exchange reactions from non-magnetic layered perovskites

H. Kageyama, L. Viciu, G. Caruntu, Y. Ueda, J. B. Wiley

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15 Scopus citations

Abstract

New layered magnetic materials, (MCl)Ca2Ta3O10 (M = Cu, Fe), have been prepared by ion-exchange reactions of non-magnetic perovskite derivatives, ACa2Ta3O10 (A = Rb, Li), in corresponding anhydrous molten salts. Powder x-ray diffraction patterns of the products are successfully indexed assuming tetragonal symmetry with cell dimensions a = 3.829 Å and c = 15.533 Å for Cu, and a = 3.822 Å and c = 15.672 Å for Fe. Being separated by the Ca2Ta3O10 triple-layer perovskite slabs, the transition-metal chloride (MCl) network provides a two-dimensional magnetic lattice. Magnetic susceptibility measurements show that (CuCl)Ca2Ta3O10 is in an antiferromagnetic state below 8 K, while (FeCl)Ca2Ta3O10 has two anomalies at 91 and 125 K, suggesting successive phase transitions due to geometrical spin frustration.

Original languageEnglish
Pages (from-to)S585-S590
JournalJournal of Physics: Condensed Matter
Volume16
Issue number11 SPEC. ISS.
DOIs
StatePublished - Mar 24 2004

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