115 citations · 452 across the 8 of their papers we have counts for
8 papers
Spin-phonon interactions and magnetoelectric coupling in CoO ( = Nb, Ta)
K. Park, J. Kim, S. Choi +10
In order to explore the consequences of spin-orbit coupling on spin-phonon interactions in a set of chemically-similar mixed metal oxides, we measured the infrared vibrational prop…
Collective magnetism at multiferroic vortex domain walls
Yanan Geng, Nara Lee, Y. J. Choi +2
Topological defects have been playgrounds for many emergent phenomena in complex matter such as superfluids, liquid crystals, and early universe. Recently, vortex-like topological…
Temperature-dependent properties of the magnetic order in single-crystal BiFeO3
M. Ramazanoglu, W. Ratcliff, Y. J. Choi +3
We report neutron diffraction and magnetization studies of the magnetic order in multiferroic BiFeO3. In ferroelectric monodomain single crystals, there are three magnetic cycloida…
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…
Observation of Anomalous Phonons in E-Type Orthorhombic REMnO3
P. Gao, H. Y. Chen, T. A. Tyson +5
We observe the appearance of a phonon near the lock-in temperature in orthorhombic REMnO3 (RE: Lu and Ho) and anomalous phonon hardening in orthorhombic LuMnO3. The anomalous phono…
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…