Electronic Excitations of Polar Magnet (Fe1-xZnx)2Mo3O8 Probed by Resonant Inelastic X-ray Scattering
Hsiao-Yu Huang1*, Amol Singh1, Ramesh Babu Kunchala2, Jun Okamoto1, Ting-Chun Huang3, Ashish Chainani1, Yu-Miin Sheu3, Takashi Kurumaji4, Yoshinori Tokura4, Guang-Yu Guo2, Chien-Te Chen1, Di-Jing Huang1
1National Synchrotron Research Radiation Center, Hsinchu, Taiwan
2Department of Physics, National Taiwan University, Taipei, Taiwan
3Department of Electrophysics, National Chiao Tung University, Hsinchu, Taiwan
4Department of Applied Physics and Quantum Phase Electronics Center (QPEC), University of Tokyo, Tokyo, Taiwan
* Presenter:Hsiao-Yu Huang, email:physh.physics@gmail.com
Multiferroic materials which possess more than one ferroic order have attracted much interest because of the spontaneous coexistence of electricity and (anti)magnetism. The magnetoelectric (ME) effect is a key in designing novel electronic devices. The polar magnet Fe2Mo3O8 shows not only strong ME coupling but also chemical-doping controllability of the distinct ME phases. To study the change of electronic structure with doping, we measured the high-resolution resonant inelastic X-ray scattering (RIXS) at Fe L-edge of (Fe1-xZnx)2Mo3O8 with x = 0 and 0.125. In combination with charge-transfer multiplet calculations, our RIXS results disentangle the electronic properties of octahedral and tetrahedral Fe2+ and provide spectroscopic evidence that the doped Zn favors to replace tetrahedral Fe in the doped compound, in agreement with LDA+U calculations.

Keywords: Multiferroic, X-ray scattering, Magnetic structure