BaFe4O7 and K0.22Ba0.89Fe4O7: Canted Antiferromagnetic Diferrites with Exceptionally High Magnetic Ordering Temperatures [BaFe4O7 and K0.22Ba0.89Fe4O7– New Canted Antiferromagnetic Diferrites with Exceptionally High Magnetic Ordering Temperatures]
Here, complex iron containing oxides, typically referred to as ferrites, have been extensively studied for their electronic and magnetic properties, including magnetotransport, ferromagnetism, ferroelectricity, and a combination of the latter two, known as multiferroism. The search for materials possessing simultaneous ferromagnetic and ferroelectric behavior is of significant interest both for the advancement of fundamental science and for applications in random access memory (RAM). Despite the great technological potential of multiferroics, one or both of the ferroic ordering temperatures tend to fall below room temperature, such as in the compositions TbMnO3 and Ni3V2O8, thus eliminating their practical utility for RAM applications. The scarcity of multiferroics possessing room temperature ferroic orderings continues to drive exploratory research in this field. For this reason, ferrites have garnered significant interest due to their often high ferroic ordering temperatures, for example in BiFeO3. Among all ferrites, hexaferrites are the most studied prototypical examples and constitute a specific subclass of ferrites that follows the stoichiometry BaO–nFe2O3, in which the n value dictates the nomenclature, i.e., (n = 6) is a hexaferrite or (n = 1) is a monoferrite. This versatile class of materials encompasses a wide range of related structures best described by Pullar, serving as the motivation for this work.
- Research Organization:
- Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)
- Sponsoring Organization:
- USDOE Office of Science (SC), Workforce Development for Teachers and Scientists (WDTS)
- Grant/Contract Number:
- AC05-00OR22725
- OSTI ID:
- 1485320
- Journal Information:
- Chemistry of Materials, Vol. 29, Issue 7; ISSN 0897-4756
- Publisher:
- American Chemical Society (ACS)Copyright Statement
- Country of Publication:
- United States
- Language:
- English
Web of Science
Neutron Instruments for Research in Coordination Chemistry: Neutron Instruments for Research in Coordination Chemistry
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Oxo-Hydroxoferrate K 2− x Fe 4 O 7− x (OH) x : Hydroflux Synthesis, Chemical and Thermal Instability, Crystal and Magnetic Structures
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journal | January 2019 |
A suite-level review of the neutron powder diffraction instruments at Oak Ridge National Laboratory
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journal | September 2018 |
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