Journal
CERAMICS INTERNATIONAL
Volume 45, Issue 1, Pages 1093-1097Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.ceramint.2018.09.290
Keywords
Magnetic properties; Co4-xMnxNb2O9 crystals; Spin-flop; Oxides
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Funding
- National Natural Science Foundation of China (NSFC) [11774217, 51372149, 11574194]
- Science and Technology Commission of Shanghai Municipality [16DZ2260600]
- Program for Professor of Special Appointment (Eastern Scholar) at Shanghai Institutions of Higher Learning
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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 eel temperature. A spin-flop transition is reported for the first time in Mn4Nb2O9 at a field of 10.9 T at 2K.
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