2008/08/28 by B. Roessli, P. Fischer, Peter Fischer +11
Chemistry · Materials Science · Physics and Astronomy · #Advanced Condensed Matter Physics #Anisotropy #Chemistry #Condensed matter physics #Crystallography #Dielectric #Diffraction #Ferroelectricity #Magnetic and transport properties of perovskites and related materials #Magnetic field #Magnetic moment #Magnetic structure #Magnetization #Materials science #Multiferroics #Multiferroics and related materials #Neutron #Neutron diffraction #Nuclear magnetic resonance #Optics #Physics #Polarization (electrochemistry) #Single crystal #cond-mat.mtrl-sci #cond-mat.str-el
paper · pdf · doi:10.1088/0953-8984/20/48/485216
arxiv created 2008/08/28 · openalex publication_date 2008/10/28 · arxiv updated 2009/12/01 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05
The noncentrosymmetric magnetic structure of ErMn 2 O 5 has been shown to be very similar to that of HoMn 2 O 5 (Vecchini et al 2008 Phys. Rev. B 77 134434). The magnetic modulation at 25 K has propagation vector and the symmetry imposes very few constraints on the magnetic configurations allowed. Only by combining the results of bulk magnetization measurements, powder and single crystal neutron diffraction and spherical neutron polarization analysis was it possible to distinguish clearly between different models. The susceptibility measurements show that the erbium magnetic moments are aligned parallel to the c -axis indicating strong single ion anisotropy. Spherical neutron polarimetry demonstrates the presence of two unequally populated chirality domains in ErMn 2 O 5 single crystals. X-ray diffraction measurements on an ErMn 2 O 5 powder using synchrotron radiation show that the buckling angles of the Mn–O–Mn bond change below the transition to the ferroelectric phase.