BaFe4O7 and K0.22Ba0.89Fe4O7: Canted Antiferromagnetic Diferrites with Exceptionally High Magnetic Ordering Temperatures

Timothy Ferreira; Gregory Morrison; W. Michael Chance; Stuart Calder; Mark D. Smith; Hans Conrad Zur Loye

doi:10.1021/acs.chemmater.7b00580

BaFe₄O₇ and K_0.22Ba_0.89Fe₄O₇: Canted Antiferromagnetic Diferrites with Exceptionally High Magnetic Ordering Temperatures

Timothy Ferreira, Gregory Morrison, W. Michael Chance, Stuart Calder, Mark D. Smith, Hans Conrad Zur Loye

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Abstract

Researchers reported the synthesis, nuclear/magnetic structure, and magnetic properties of a new polymorph of BaFe₄O₇ and of the new complex ferrite K_0.22Ba_0.89 Fe₄O₇ where successful replacement of barium by potassium had resulted in the synthesis of the first reported doped diferrite compound. These isostructural compositions crystallized in a new structure type, ordered magnetically well above room temperature, and were only the second and third reported diferrite compositions.

Original language	English
Pages (from-to)	2689-2693
Number of pages	5
Journal	Chemistry of Materials
Volume	29
Issue number	7
DOIs	https://doi.org/10.1021/acs.chemmater.7b00580
State	Published - Apr 11 2017

Funding

This work was supported in part by the U.S. Department of Energy, Office of Science, Office of Workforce Development for Teachers and Scientists, Office of Science Graduate Student Research (SCGSR) program. The SCGSR program is administered by the Oak Ridge Institute for Science and Education for the DOE under contract number DESC0014664. This work was also supported in part by a University of South Carolina ASPIRE II award. Funding by the National Science Foundation under award DMR-1301757 is gratefully acknowledged. This research used resources at the High Flux Isotope Reactor, a DOE Office of Science User Facility operated by the Oak Ridge National Laboratory.

Funders	Funder number
DOE Office of Science
Office of Science Graduate Student Research
SCGSR
National Science Foundation	1301757, DMR-1301757
U.S. Department of Energy	DESC0014664
Office of Science
Workforce Development for Teachers and Scientists
Oak Ridge National Laboratory
Oak Ridge Institute for Science and Education
University of South Carolina

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abstract = "Researchers reported the synthesis, nuclear/magnetic structure, and magnetic properties of a new polymorph of BaFe4O7 and of the new complex ferrite K0.22Ba0.89 Fe4O7 where successful replacement of barium by potassium had resulted in the synthesis of the first reported doped diferrite compound. These isostructural compositions crystallized in a new structure type, ordered magnetically well above room temperature, and were only the second and third reported diferrite compositions.",

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BaFe₄O₇ and K_0.22Ba_0.89Fe₄O₇: Canted Antiferromagnetic Diferrites with Exceptionally High Magnetic Ordering Temperatures

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