DataVXChemistry of MaterialsPaper
journal article·2014-08-26

B-Cation Order Control of Magnetism in the 1322 Perovskite CaCu3Fe2Nb2O12

Mark S. Senn, Wei-tin Chen, Takashi Saito, Susana García-Martín, J. Paul Attfield, Yuichi Shimakawa

Chemistry of Materials· Volume 26· Issue 16
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Source abstract

Abstract

Cation ordering in the 1322 perovskite CaCu 3 Fe 2 Nb 2 O 12 has been investigated by synchrotron X-ray diffraction structure analysis, high-resolution electron microscopy, and magnetic measurements. All of the samples have full 1:3 ordering of Ca and Cu cations at the perovskite A-sites, but the Fe and Nb cations at the B sites show different degrees of ordering depending on the synthesis conditions. A slow-cooled sample has almost complete rock-salt-type 1:1 cation ordering at the B sites, but a rapidly cooled sample has no long-range B-cation arrangement. The ordered compound shows a large saturated magnetization (5.7 μ B /formula unit (fu)) below 170 K due to the ferrimagnetism of the A′-site Cu 2+ and B-site Fe 3+ spins, whereas the B-site disordered form has a small magnetization (<1 μ B /fu at 5 K). The degree of B-site cation order thus controls the magnetic behavior of 1322 CaCu 3 Fe 2 Nb 2 O 12 perovskites.
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Research context

Electronic materials

OpenAlex topics: Magnetic and transport properties of perovskites and related materials · Dielectric properties of ceramics · Multiferroics and related materials

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

Affiliations

Centre for Science at Extreme Conditions and School of Chemistry, University of Edinburgh, Mayfield Road, Edinburgh EH9 3JZ, United Kingdom

Institute for Chemical Research, Kyoto University, Uji, Kyoto 611-0011, Japan

Departamento de Química Inorgánica, Facultad de C.C. Químicas, Universidad Complutense, Madrid-28040, Spain

Japan Science and Technology Agency, CREST, Uji, Kyoto 611-0011, Japan

Funding

Engineering and Physical Sciences Research Council · Royal Society · Ministry of Education, Culture, Sports, Science, and Technology · Ministerio de Economía y Competitividad · Science and Technology Facilities Council · Japan Society for the Promotion of Science · Japan Science and Technology Agency

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