Universität zu Köln

Abakumov, Artem M., Hadermann, Joke ORCID: 0000-0002-1756-2566, Batuk, Maria ORCID: 0000-0003-1411-9785, D'Hondt, Hans, Tyablikov, Oleg A., Rozova, Marina G., Pokholok, Konstantin V., Filimonov, Dmitry S., Sheptyakov, Denis V., Tsirlin, Alexander A., Niermann, Daniel, Hemberger, Joachim, Van Tendeloo, Gustaaf and Antipov, Evgeny V. (2010). Slicing the Perovskite Structure with Crystallographic Shear Planes: The A(n)B(n)O(3n-2) Homologous Series. Inorg. Chem., 49 (20). S. 9508 - 9517. WASHINGTON: AMER CHEMICAL SOC. ISSN 1520-510X

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Abstract

A new A(n)B(n)O(3-n) homologous series of anion-deficient perovskites has been evidenced by preparation of the members with n = 5 (Pb2.9Ba2.1Fe4TiO13) and n = 6 (Pb3.8Bi0.2Ba2Fe4.2Ti1.8O16) in a single phase form. The crystal structures of these compounds were determined using a combination of transmission electron microscopy and X-ray and neutron powder diffraction (S.G. Ammm, a= 5.74313(7), b= 3.98402(4), c= 26.83780(4) angstrom, R-I= 0.035, R-P = 0.042 for Pb2.9Ba2.1Fe4TiO13 and S.G. Imma, a = 5.7199(1), b = 3.97066(7), c = 32.5245(8) angstrom, R-I = 0.032, R-P = 0.037 for Pb3.813i0,2Ba2Fe4,2Ti1.8016). The crystal structures of the A(n)B(n)O(3n-2) homologues are formed by slicing the perovskite structure with (101)p crystallographic shear (CS) planes. The shear planes remove a layer of oxygen atoms and displace the perovskite blocks with respect to each other by the 1/2[110](p) vector. The CS planes introduce edgesharing connections of the transition metal oxygen polyhedra at the interface between the perovskite blocks. This results in intrinsically frustrated magnetic couplings between the perovskite blocks due to a competition of the exchange interactions between the edge- and the corner-sharing metal oxygen polyhedra. Despite the magnetic frustration, neutron powder diffraction and Mossbauer spectroscopy reveal that Pb2.9Ba2.1Fe4TiO13 and Pb3.8Bi0.2Ba2Fe4.2Ti1.8O16 are antiferromagnetically ordered below TN = 407 and 343 K, respectively. The Pb2.9Ba2.1Fe4TiO13 and Pb3.8Bi0.2Ba2Fe4.2Ti1.8O16 compounds are in a paraelectric state in the 5-300 K temperature range.

Item Type:	Journal Article
Creators:	Creators Email ORCID ORCID Put Code Abakumov, Artem M. UNSPECIFIED UNSPECIFIED UNSPECIFIED Hadermann, Joke UNSPECIFIED orcid.org/0000-0002-1756-2566 UNSPECIFIED Batuk, Maria UNSPECIFIED orcid.org/0000-0003-1411-9785 UNSPECIFIED D'Hondt, Hans UNSPECIFIED UNSPECIFIED UNSPECIFIED Tyablikov, Oleg A. UNSPECIFIED UNSPECIFIED UNSPECIFIED Rozova, Marina G. UNSPECIFIED UNSPECIFIED UNSPECIFIED Pokholok, Konstantin V. UNSPECIFIED UNSPECIFIED UNSPECIFIED Filimonov, Dmitry S. UNSPECIFIED UNSPECIFIED UNSPECIFIED Sheptyakov, Denis V. UNSPECIFIED UNSPECIFIED UNSPECIFIED Tsirlin, Alexander A. UNSPECIFIED UNSPECIFIED UNSPECIFIED Niermann, Daniel UNSPECIFIED UNSPECIFIED UNSPECIFIED Hemberger, Joachim UNSPECIFIED UNSPECIFIED UNSPECIFIED Van Tendeloo, Gustaaf UNSPECIFIED UNSPECIFIED UNSPECIFIED Antipov, Evgeny V. UNSPECIFIED UNSPECIFIED UNSPECIFIED
URN:	urn:nbn:de:hbz:38-494194
DOI:	10.1021/ic101233s
Journal or Publication Title:	Inorg. Chem.
Volume:	49
Number:	20
Page Range:	S. 9508 - 9517
Date:	2010
Publisher:	AMER CHEMICAL SOC
Place of Publication:	WASHINGTON
ISSN:	1520-510X
Language:	English
Faculty:	Unspecified
Divisions:	Unspecified
Subjects:	no entry
Uncontrolled Keywords:	Keywords Language OXIDE; CHEMISTRY Multiple languages Chemistry, Inorganic & Nuclear Multiple languages
URI:	http://kups.ub.uni-koeln.de/id/eprint/49419