2009/06/30 by M. Pregelj, O. Zaharko, A. Zorko +13
Materials Science · Physics and Astronomy · #Advanced Condensed Matter Physics #Amplitude #Condensed matter physics #Coupling (piping) #Dielectric #Ferroelectric and Piezoelectric Materials #Ferroelectricity #Magnetic moment #Materials science #Multiferroics #Multiferroics and related materials #Order (exchange) #Physics #Polarizability #Quantum mechanics #Relaxation (psychology) #cond-mat.mtrl-sci #cond-mat.other
paper · pdf · doi:10.1103/physrevlett.103.147202
published as Physical Review Letters 103, 147202 (2009)
openalex publication_date 2009/09/30 · arxiv created 2009/10/01 · arxiv updated 2009/12/01 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05
The magnetic and ferroelectric properties of the layered geometrically frustrated cluster compound FeTe2O5Br were investigated with single-crystal neutron diffraction and dielectric measurements. An incommensurate transverse amplitude modulated magnetic order with the wave vector q=(1/2,0.463,0) develops below T(N)=10.6(2) K. Simultaneously, a ferroelectric order due to exchange striction involving polarizable Te4+ lone-pair electrons develops perpendicular to q and to Fe3+ magnetic moments. The observed magnetoelectric coupling is proposed to originate from the temperature dependent phase difference between neighboring amplitude modulation waves.