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Strong impact of low-level substitution of Mn by Fe on the magnetoelectric coupling in <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:mrow><mml:mi>TbMn</mml:mi><mml:msub><mml:mi mathvariant="normal">O</mml:mi><mml:mn>3</mml:mn></mml:msub></mml:mrow></mml:math>
The correlation between static magnetoelectric coupling and magnetic structure was investigated in $\mathrm{TbM}{\mathrm{n}}_{0.98}\mathrm{F}{\mathrm{e}}_{0.02}{\mathrm{O}}_{3}$ with magnetic field up to 8 T and down to 2 K. Single-crystal neutron diffraction experiments reveal a substantial increase in the temperature dependence of the incommensurate modulation wave vector of the antiferromagnetic phase as the magnetic …