Interplay of spin, orbital and lattice correlations in an XY-like spin-glass (Ni0.4Mn0.6)TiO3 single-crystal: Neutron and X-ray studies
|Speaker:||Prof. PONG Wayfaung|
Department of Physics, Tamkang University
|Place:||ROOM 9004, Hefei National Laboratory Building|
Small angle neutron scattering (SANS), resonant inelastic X-ray scattering (RIXS) and X-ray absorption spectroscopy have been carried out to study the correlations of magnetic properties and electronic/atomic structures in an XY-like spin-glass (SG) state of Ni0.4Mn0.6TiO3 (NMTO) single crystal. SANS presents the texture of toroidal glass and H (magentic)-T (temperature) phase diagram in NMTO. The results of RIXS show the evidence of crystal field (d-d) excitations at Ni and Mn L3-edge. Importantly, the spin-flip excitation is observable which is prominent at Ni L3-edge RIXS spectra in NMTO mainly. Using temperature-dependent X-ray linear dichroism (XLD) and extended X-ray absorption fine structure (EXAFS) measurements, it has revealed that phonon softening/symmetry breaking occurred at low temperature near SG phase transition due to the local static disorder in Ni-O bond length, and further induced the Ni 3d electron preference occupation charge from in-plane (3dx2-y2) to out-of-plane (3dz2-r2) states, demonstrating the strong correlations of spin, orbital and lattice in an XY-like SG state of NMTO.
|Organizer:||Hefei National Laboratory for Physical Sciences at the Microscale|
- MORE NEWS
According to the latest Nature Publishing Index (NPI) Asia-Pacific and The Nature Publishing Index China, University of Science and Technology of China tops in Chinese universities again. The rankings are based on the number of papers that were published in Nature journals during the last 12 months.
This article came from News Center of USTC.