Presentation Information
[8p-E217-5]Magnetic and Magnetoelectric Properties of Zn2Mo3O8 with Impurity Substitution at the Mo-Site
〇Taichi Ishikawa1, Takumi Shirasaki1, Shungo Nakayama1, Hideki Kuwahara1 (1.Sophia Univ.)
Keywords:
Multiferroics,Spin singlet,4d transition metal oxides
The layered polar magnet M2Mo3O8 (space group P63mc) consists of M2+ and Mo4+ layers stacked along the c-axis and exhibits a giant magnetoelectric effect from the coupling between M2+ spins and spontaneous polarization. In contrast to the magnetic M2+ layers, Mo4+ ions form stable Mo3 trimers (S = 0) above room temperature, making the Mo layers non-magnetic. We recently reported that partially breaking these trimers in Fe2Mo3O8 by impurity substitution at the Mo site induces a ferromagnetic like response of Mo4+ spins at 300 K. To clarify this effect across parent compounds with different ground states, we extend the study to M = Fe (antiferromagnet), Mn (ferrimagnet), Zn (diamagnet). A polycrystalline sample of Zn2 (Mo1-xTix) 3O8 was synthesized by mixing ZnMoO4, Mo, and Ti in a molar ratio of 2.02:(1-3x):3x, sealing the mixture in an evacuated quartz tube, and sintering it at 850 ℃. For x = 0.1, the sample contained 4.3 wt.% of a TiO2 impurity phase. In this presentation, we will report the magnetic and magnetoelectric properties of impurity substituted M2Mo3O8 (M = Mn, Fe, Zn).