Tuning the magnetic anisotropy via Mn substitution in single crystal Co4Nb2O9

By using the optical floating-zone technique to grow a series of high-quality Co4-xMnxNb2O9 single crystals, the effect of Mn doping on the magnetic anisotropy and spin-flop is investigated. The antiferromagnetic phase transition and spin-flop transition for these samples (x ≤ 3.9) are similar to those in the parent phase of Co4Nb2O9, revealing that Co2+ ions in Co4-xMnxNb2O9 possess a strong single-ion anisotropy. The critical doping content, above which the magnetic anisotropy changes from easy-plane to easy-axis, has been identified as x = 3.95 with an additional kink observed in the magnetization curve below the N é el temperature. A spin-flop transition is reported for the first time in Mn4Nb2O9 at a field of 10.9 T at 2 K. © 2018 Elsevier Ltd and Techna Group S.r.l.

Keywords

Magnetic properties, Oxides, Spin, Monocrystals, Antiferromagnetism, Phase transformations, Anisotropy, Neel temperature

Citation

Yu, Y., Deng, G., Cao, Y., McIntyre, G. J., Li, R., Yuan, N., Feng, Z., Ge, J.-Y., Zhang, J., & Cao, S. (2019). Tuning the magnetic anisotropy via Mn substitution in single crystal Co4Nb2O9. Ceramics International, 45(1), 1093-1097, doi"10.1016/j.ceramint.2018.09.290