Universität zu Köln

Retuerto, M., Li, M. R., Ignatov, A., Croft, M., Ramanujachary, K. V., Chi, S., Hodges, J. P., Dachraoui, W., Hadermann, J., Thao Tran, T., Halasyamani, P. Shiv, Grams, C. P., Hemberger, J. and Greenblatt, M. (2013). Polar and Magnetic Layered A-Site and Rock Salt B-Site-Ordered NaLnFeWO(6) (Ln = La, Nd) Perovskites. Inorg. Chem., 52 (21). S. 12482 - 12492. WASHINGTON: AMER CHEMICAL SOC. ISSN 1520-510X

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Abstract

We have expanded the double perovskite family of materials with the unusual combination of layered order in the A sublattice and rock salt order over the B sublattice to compounds NaLaFeWO6 and NaNdFeWO6. The materials have been synthesized and studied by powder X-ray diffraction, neutron diffraction, electron diffraction, magnetic measurements, X-ray absorption spectroscopy, dielectric measurements, and second harmonic generation. At room temperature, the crystal structures of both compounds can be defined in the noncentrosymmetric monoclinic P2(1) space group resulting from the combination of ordering both in the A and B sublattices, the distortion of the cell due to tilting of the octahedra, and the displacement of certain cations. The magnetic studies show that both compounds are ordered antiferromagnetically below T-N approximate to 25 K for NaLaFeWO6 and at similar to 21 K for NaNdFeWO6. The magnetic structure of NaNdFeWO6 has been solved with a propagation vector k = (1/2 0 1/2) as an antiferromagnetic arrangement of Fe and Nd moments. Although the samples are potential multiferroics, the dielectric measurements do not show a ferroelectric response.

Item Type:	Journal Article
Creators:	Creators Email ORCID ORCID Put Code Retuerto, M. UNSPECIFIED UNSPECIFIED UNSPECIFIED Li, M. R. UNSPECIFIED UNSPECIFIED UNSPECIFIED Ignatov, A. UNSPECIFIED UNSPECIFIED UNSPECIFIED Croft, M. UNSPECIFIED UNSPECIFIED UNSPECIFIED Ramanujachary, K. V. UNSPECIFIED UNSPECIFIED UNSPECIFIED Chi, S. UNSPECIFIED UNSPECIFIED UNSPECIFIED Hodges, J. P. UNSPECIFIED UNSPECIFIED UNSPECIFIED Dachraoui, W. UNSPECIFIED UNSPECIFIED UNSPECIFIED Hadermann, J. UNSPECIFIED UNSPECIFIED UNSPECIFIED Thao Tran, T. UNSPECIFIED UNSPECIFIED UNSPECIFIED Halasyamani, P. Shiv UNSPECIFIED UNSPECIFIED UNSPECIFIED Grams, C. P. UNSPECIFIED UNSPECIFIED UNSPECIFIED Hemberger, J. UNSPECIFIED UNSPECIFIED UNSPECIFIED Greenblatt, M. UNSPECIFIED UNSPECIFIED UNSPECIFIED
URN:	urn:nbn:de:hbz:38-472158
DOI:	10.1021/ic401491y
Journal or Publication Title:	Inorg. Chem.
Volume:	52
Number:	21
Page Range:	S. 12482 - 12492
Date:	2013
Publisher:	AMER CHEMICAL SOC
Place of Publication:	WASHINGTON
ISSN:	1520-510X
Language:	English
Faculty:	Unspecified
Divisions:	Unspecified
Subjects:	no entry
Uncontrolled Keywords:	Keywords Language FERROELECTRIC POLARIZATION; NEUTRON-DIFFRACTION; MAGNETORESISTANCE; CATIONS; WO3 Multiple languages Chemistry, Inorganic & Nuclear Multiple languages
URI:	http://kups.ub.uni-koeln.de/id/eprint/47215