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Ni D, Cava RJ. Ferrites without iron as potential quantum materials. PROG SOLID STATE CH 2022. [DOI: 10.1016/j.progsolidstchem.2021.100346] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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Li J, Medina EA, Stalick JK, Sleight AW, Subramanian M. Structural studies of CaAl12O19, SrAl12O19, La2/3+δ Al12–δO19, and CaAl10NiTiO19 with the hibonite structure; indications of an unusual type of ferroelectricity. ZEITSCHRIFT FUR NATURFORSCHUNG SECTION B-A JOURNAL OF CHEMICAL SCIENCES 2016. [DOI: 10.1515/znb-2015-0224] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
Abstract
Various oxides with the hibonite structure were synthesized and structurally analyzed using powder neutron diffraction. The structure of CaAl12O19 at 298 and 11 K shows dipoles that are apparently too dilute to order unless subjected to a suitable electric field. Magnetoplumbites, such as BaFe12O19, are isostructural with hibonite. These compounds possess ferromagnetic properties, which combined with the electric dipoles may influence multiferroic behavior. Our SrAl12O19 sample showed two distinct hexagonal phases, a major phase with the normal hibonite structure and a minor phase having a closely related structure. Our sample of the defect hibonite phase La2/3+δAl12–δO19 shows a distinctly higher δ value (0.25) vs. that reported (~0.15) for samples made from the melt. Finally, we used to advantage the negative scattering length of Ti to determine the site occupancies of Ni and Ti in CaAl10NiTiO19.
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Affiliation(s)
- Jun Li
- Department of Chemistry , Oregon State University , Corvallis, OR 97331, USA
| | - Elena A. Medina
- Department of Chemistry , Oregon State University , Corvallis, OR 97331, USA
| | - Judith K. Stalick
- NIST Center for Neutron Research, National Institute of Standards and Technology , 100 Bureau Drive, Gaithersburg, MD 20899, USA
| | - Arthur W. Sleight
- Department of Chemistry , Oregon State University , Corvallis, OR 97331, USA
| | - M.A. Subramanian
- Department of Chemistry , Oregon State University , Corvallis, OR 97331, USA
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Wagner T. Preparation and Crystal Structure Analysis of Magnetoplumbite-Type BaGa12O19. J SOLID STATE CHEM 1998. [DOI: 10.1006/jssc.1997.7681] [Citation(s) in RCA: 120] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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Scheikowski M, M�ller-Buschbaum H. Zur Kristallchemie der Blei-Lanthanoid-Oxoaluminate. Zur Kenntnis von Pb2HoAl3O8 und Pb2LuAl3O8. Z Anorg Allg Chem 1993. [DOI: 10.1002/zaac.19936191022] [Citation(s) in RCA: 18] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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