Impact of Mn3+ substitution on magnetization and electric polarization behavior in geometry frustrated CuFe1−xMnxO2
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The Mn3+ doped single crystal samples CuFe1−xMnxO2 with x = 0.01, 0.03 and 0.05 were synthetic by floating zone method, and their magnetization and electric polarization were measured with static and pulsed high magnetic field up to 50 T in the temperature ranging from 2 to 300 K. A series of field-induced magnetic phase transitions and electric polarization, which show obviously anisotropy, were observed in all the doped samples, and their critical fields were directly related to the Mn3+ doping level. The pulsed high magnetic dielectric polarization measurements show that, in the ferroelectric incommensurate phase, the spontaneous electric polarization region is enhanced by the Mn3+ dopant. The impact of the Mn3+ substitution on magnetic and electric polarization behaviors may associate with the partial release of spin frustration in the CuFeO2. Based on the experimental results, the impact of Mn3+ doping on the magnetization and electric polarization behavior as well as their anisotropy are investigated and a detailed magnetic diagram are assumed.
This work was supported in part by the National Key R&D Program of China (Grant No. 2016YFA0401003), the National Natural Science Foundation of China (Grant Nos. 11674115, 51861135104, 11104091, 11474110 and 11747014), and the Fundamental Research Funds for the Central Universities (Grant No. 2018KFYXKJC010).
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