Site disorder induced hexagonal-orthorhombic transition in Y3+1-xGd3+xMnO3

Jan-Willem G Bos, Bas B van Aken, Thomas T M Palstra

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Abstract

We show that the transition in AMnO(3) from the orthorhombic perovskite phase to the hexagonal phase is promoted by inducing site disorder on the A-site. The gap between the orthorhombic and the hexagonal phase is widened for site disordered, mixed yttrium-gadolinium manganite samples. At the cost of the orthorhombic phase, a two phase region emerges. The phase separation exhibits very unusual thermodynamical behavior. We also show that high-pressure synthesis favors the orthorhombic phase. YMnO3 is formed in the orthorhombic phase at 15 kbar.

Original languageEnglish
Pages (from-to)4804-4807
Number of pages4
JournalChemistry of Materials
Volume13
Issue number12
DOIs
Publication statusPublished - Dec 2001

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