2007/11/13 by Yukio Yasui, Yutaka Naito, Kenji Sato +4 · 73 citations
Materials Science · Physics and Astronomy · #Dielectric #Dielectric properties of ceramics #Ferroelectricity #Magnetic field #Magnetic structure #Multiferroics #Multiferroics and related materials #Neutron diffraction #Neutron scattering #Physics of Superconductivity and Magnetism #Polarization (electrochemistry) #cond-mat.mtrl-sci #cond-mat.str-el
paper · pdf · doi:10.1143/jpsj.77.023712
published in Journal of the Physical Society of Japan 77(2), 023712 (Physical Society of Japan) · 4 pages (5 figures), submitted to J. Phys. Soc. Jpn
arxiv created 2007/11/13 · openalex publication_date 2008/02/12 · arxiv updated 2015/05/12 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05
Neutron scattering studies and measurements of the dielectric susceptibility and ferroelectric polarization P have been carried out in various magnetic fields H for single-crystal samples of the multiferroic system LiVCuO4 with quasi one-dimensional spin 1/2 Cu2+ chains formed of edge-sharing CuO4 square planes, and the relationship between the magnetic structure and ferroelectricity has been studied. The ferroelectric polarization is significantly suppressed by the magnetic field H above 2 T applied along a and b axes. The helical magnetic structure with the helical axis parallel to c has been confirmed in H=0, and for H//a, the spin flop transition takes place at H=2 T with increasing H, where the helical axis changes to the direction parallel to H. The ferroelectric polarization along a at H=0 is found to be proportional to the neutron magnetic scattering intensity, indicating that the magnetic order is closely related to the appearance of the ferroelectricity. The relationship between the magnetic structure and ferroelectricity of LiVCuO4 is discussed by considering the existing theories.