Giant Room-Temperature Magnetodielectric Response in the Electronic Ferroelectric LuFe2O4

Giant Room-Temperature Magnetodielectric Response in the Electronic Ferroelectric LuFe2O4

A very large drop in dielectric constant upon application of small magnetic fields is observed at room temperature for LuFe2O4 (see figure). Such behavior is unprecedented and indicates a strong coupling of spins and electric dipoles at room temperature. This behavior of LuFe2O4 is apparently relate...

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Veröffentlicht in:Advanced materials (Weinheim) 2006-07, Vol.18 (13), p.1737-1739
Hauptverfasser: Subramanian, M. A., He, T., Chen, J., Rogado, N. S., Calvarese, T. G., Sleight, A. W.
Format: Artikel
Sprache:eng
Schlagworte:
Dielectrics
Ferroelectric materials
Magnetic fields
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Zusammenfassung:A very large drop in dielectric constant upon application of small magnetic fields is observed at room temperature for LuFe2O4 (see figure). Such behavior is unprecedented and indicates a strong coupling of spins and electric dipoles at room temperature. This behavior of LuFe2O4 is apparently related to its ferroelectricity, which occurs through the highly unusual mechanism of Fe2+ and Fe3+ ordering.
ISSN:0935-9648
1521-4095
DOI:10.1002/adma.200600071