Influence of the Jahn-Teller distortion on magnetic ordering in TbMn1-xFexO3 |
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| Authors: | Jin Jin-Ling Zhang Xiang-Qun Li Guo-Ke and Cheng Zhao-Hua |
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| Affiliation: | State Key Laboratory of Magnetism,Institute of Physics,Chinese Academy of Sciences |
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| Abstract: | The Jahn-Teller distortion plays an important role in determining the exchange interaction in rare-earth manganites.In this work we study the influence of the Jahn-Teller distortion on the magnetic structures of TbMn1-xFexO3(x = 0,0.02,0.05,0.10,and 0.20) single crystals in the basal MnO2 plane.The decrease in the quadruple splitting with the increasing Fe doping indicates the reduction of the Jahn-Teller distortion,which makes the nearest neighboring(NN) FM interaction dominant over the next nearest neighbor(NNN) AFM interaction.This alteration is favorable for the development of A-type AFM ordering instead of the spiral magnetic ordering,which collapses when x ≥ 0.05.The analysis of dielectric data indicates that the ferroelectricity is arising from the peculiar spiral magnetic ordering. |
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| Keywords: | quadruple splitting Jahn-Teller distortion spiral magnetic ordering |
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