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Title: 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]

Abstract

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 themore » motivation for this work.« less

Authors:
 [1]; ORCiD logo [1];  [1]; ORCiD logo [2];  [1]; ORCiD logo [1]
  1. Univ. of South Carolina, Columbia, SC (United States)
  2. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Publication Date:
Research Org.:
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Workforce Development for Teachers and Scientists (WDTS)
OSTI Identifier:
1485320
Grant/Contract Number:  
AC05-00OR22725
Resource Type:
Accepted Manuscript
Journal Name:
Chemistry of Materials
Additional Journal Information:
Journal Volume: 29; Journal Issue: 7; Journal ID: ISSN 0897-4756
Publisher:
American Chemical Society (ACS)
Country of Publication:
United States
Language:
English
Subject:
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY

Citation Formats

Ferreira, Timothy, Morrison, Gregory, Chance, W. Michael, Calder, Stuart A., Smith, Mark D., and zur Loye, Hans -Conrad. 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]. United States: N. p., 2017. Web. doi:10.1021/acs.chemmater.7b00580.
Ferreira, Timothy, Morrison, Gregory, Chance, W. Michael, Calder, Stuart A., Smith, Mark D., & zur Loye, Hans -Conrad. 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]. United States. https://doi.org/10.1021/acs.chemmater.7b00580
Ferreira, Timothy, Morrison, Gregory, Chance, W. Michael, Calder, Stuart A., Smith, Mark D., and zur Loye, Hans -Conrad. Thu . "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]". United States. https://doi.org/10.1021/acs.chemmater.7b00580. https://www.osti.gov/servlets/purl/1485320.
@article{osti_1485320,
title = {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]},
author = {Ferreira, Timothy and Morrison, Gregory and Chance, W. Michael and Calder, Stuart A. and Smith, Mark D. and zur Loye, Hans -Conrad},
abstractNote = {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.},
doi = {10.1021/acs.chemmater.7b00580},
journal = {Chemistry of Materials},
number = 7,
volume = 29,
place = {United States},
year = {Thu Mar 23 00:00:00 EDT 2017},
month = {Thu Mar 23 00:00:00 EDT 2017}
}

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Cited by: 15 works
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Figures / Tables:

Figure 1 Figure 1: (A) Polyhedral representation of BaFe4O7 (left) with Fe (III) occupying octahedra shown in green and Fe(III) occupying tetrahedral shown in gray with barium atoms shown in blue. The polyhedral representation of K0.22Ba0.89Fe4O7 (right) shows the doped potassium in light blue. (B) Scanning Electron Microscopy images typical of themore » morphology and thickness for both BaFe4O7 and K0.22Ba0.89Fe4O7.« less

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