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Giant Room–Temperature Magnetodielectric Response in the Electronic Ferroelectric LuFe 2 O 4
Author(s) -
Subramanian M. A.,
He T.,
Chen J.,
Rogado N. S.,
Calvarese T. G.,
Sleight A. W.
Publication year - 2006
Publication title -
advanced materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 10.707
H-Index - 527
eISSN - 1521-4095
pISSN - 0935-9648
DOI - 10.1002/adma.200600071
Subject(s) - materials science , ferroelectricity , dielectric , spins , dipole , condensed matter physics , drop (telecommunication) , optoelectronics , electrical engineering , physics , engineering , chemistry , organic chemistry
A very large drop in dielectric constant upon application of small magnetic fields is observed at room temperature for LuFe 2 O 4 (see figure). Such behavior is unprecedented and indicates a strong coupling of spins and electric dipoles at room temperature. This behavior of LuFe 2 O 4 is apparently related to its ferroelectricity, which occurs through the highly unusual mechanism of Fe 2+ and Fe 3+ ordering.