598 citations · 2k across the 29 of their papers we have counts for
19 papers · 1 filter
Neutron scattering sum rules, symmetric exchanges, and helicoidal magnetism in MnSbO
E. Chan, H. Lane, J. Pásztorová +9
MnSbO is based on the noncentrosymmetric space group with magnetic Mn (, ) spins ordering below K in a helicoidal…
Band-Mott mixing hybridizes the gap in FeMoO
K. Park, G. L. Pascut, G. Khanal +9
We combined optical spectroscopy and first principles electronic structure calculations to reveal the charge gap in the polar magnet FeMoO. Iron occupation on the octah…
Soft antiphase tilt of oxygen octahedra in the hybrid improper multiferroic Ca3Mn1.9Ti0.1O7
Feng Ye, Jinchen Wang, Jieming Sheng +13
We report a single crystal neutron and x-ray diffraction study of the hybrid improper multiferroic Ca3Mn1.9Ti0.1O7 (CMTO), a prototypical system where the electric polarization ari…
Terahertz Spin-Orbital Excitations in the paramagnetic state of multiferroic SrFeSiO
Thuc T. Mai, C. Svoboda, M. T. Warren +5
We studied the novel multiferroic material SrFeSiO, and found 3 absorption modes above the magnetic ordering transition temperature using time-domain terahertz spectros…
Ferroelectric and Magnetic Domains in LuFe2O4 Observed by Scanning Probe Microscopy
I. K. Yang, J. Kim, S. H. Lee +3
LuFe2O4 is a multiferroic system which exhibits ferroelectricity, charge order, and ferrimagnetic order simultaneously below ~230 K. The ferroelectric domains of LuFe2O4 are imaged…
Quadrupolar Singlet Ground State of Praseodymium in a Modulated Pyrochlore
J. van Duijn, K. H. Kim, N. Hur +12
The complex structure and magnetism of PrBiRuO was investigated by neutron scattering and EXAFS. Pr has an approximate doublet ground-state and the first excite…
Magnon breakdown in a two dimensional triangular lattice Heisenberg antiferromagnet of multiferroic LuMnO
Joosung Oh, Manh Duc Le, Jaehong Jeong +7
The breakdown of magnons, the quasiparticles of magnetic systems, has rarely been seen. By using an inelastic neutron scattering technique we report the observation of spontaneous…
Dimerization-Induced Cross-Layer Quasi-Two-Dimensionality in Metallic Iridate IrTe2
G. L. Pascut, K. Haule, M. J. Gutmann +7
The crystal structure of layered metal IrTe2 is determined using single-crystal x-ray diffraction. At T=220 K, it exhibits Ir and Te dimers forming a valence-bond crystal. Electron…
Negative magnetostrictive magnetoelectric coupling of BiFeO3
Sanghyun Lee, M. T. Fernandez-Diaz, H. Kimura +8
How the magnetoelectric coupling actually occurs on a microscopic level in multiferroic BiFeO3 is not well known. By using the high-resolution single crystal neutron diffraction te…
X-ray imaging and multiferroic coupling of cycloidal magnetic domains in ferroelectric monodomain BiFeO3
R. D. Johnson, P. Barone, A. Bombardi +6
Magnetic domains at the surface of a ferroelectric monodomain BiFeO3 single crystal have been imaged by hard X-ray magnetic scattering. Magnetic domains up to several hundred micro…
Spin waves and revised crystal structure of honeycomb iridate Na2IrO3
S. K. Choi, R. Coldea, A. N. Kolmogorov +11
We report inelastic neutron scattering measurements on Na2IrO3, a candidate for the Kitaev spin model on the honeycomb lattice. We observe spin-wave excitations below 5 meV with a…
Independent ferroelectric contributions and rare-earth-induced polarization reversal in multiferroic TbMn2O5
N. Leo, D. Meier, R. V. Pisarev +3
Three independent contributions to the magnetically induced spontaneous polarization of multiferroic TbMn2O5 are uniquely separated by optical second harmonic generation and an ana…
Optical identification of hybrid magnetic and electric excitations in Dy3Fe5O12 garnet
P. D. Rogers, Y. J. Choi, E. Standard +10
Far-infrared spectra of magneto-dielectric Dy3Fe5O12 garnet were studied between 13 and 100 cm-1 and at low temperatures between 5 and 80 K. A combination of transmission, reflecti…
Origin of Electric Field Induced Magnetization in Multiferroic HoMnO3
B. G. Ueland, J. W. Lynn, M. Laver +2
We have performed polarized and unpolarized small angle neutron scattering experiments on single crystals of HoMnO3 and have found that an increase in magnetic scattering at low mo…
Giant Magnetoelectric Effect in a Multiferroic Material with a High Ferroelectric Transition Temperature
N. Hur, I. K. Jeong, M. F. Hundley +2
We present a unique example of giant magnetoelectric effect in a conventional multiferroic HoMnO3, where polarization is very large (~56 mC/m2) and the ferroelectric transition tem…
Correlated Polarons in Dissimilar Perovskite Manganites
C. S. Nelson, M. v. Zimmermann, J. P. Hill +10
We report x-ray scattering studies of broad peaks located at a (0.5 0 0)/(0 0.5 0)-type wavevector in the paramagnetic insulating phases of La_{0.7}Ca_{0.3}MnO_{3} and Pr_{0.7}Ca_{…
Thermal/Electronic Transport Properties and Two-Phase Mixtures in La_{5/8-x}Pr_{x}Ca_{3/8}MnO_{3}
K. H. Kim, M. Uehara, C. Hess +2
We measured thermal conductivity, k, thermoelectric power, S, and dc electric conductivity, sigma, of La_{5/8-x}Pr_{x}Ca_{3/8}MnO_{3}, showing an intricate interplay between metall…
Raman scattering study of anomalous charge-, spin-, and lattice-dynamics in the charge-ordered phase of ()
S. Yoon, M. Rubhausen, S. L. Cooper +2
We report an inelastic light scattering study of the effects of charge-ordering on the spin-, charge-, and lattice-dynamics in . We…
Magnon Damping by magnon-phonon coupling in Manganese Perovskites
Pengcheng Dai, H. Y. Hwang, Jiandi Zhang +5
Inelastic neutron scattering was used to systematically investigate the spin-wave excitations (magnons) in ferromagnetic manganese perovskites. In spite of the large differences in…