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• W4381853791 abstract "Rare-earth iron borates, $R{mathrm{Fe}}_{3}{({mathrm{BO}}_{3})}_{4}$ ($R$ = rare earth), are of considerable interest because of their structural and magnetic complexities due to the involvement of both $3d$ and $4f$ magnetic interactions in a helical lattice. Among them ${mathrm{Ho}}_{0.5}{mathrm{Nd}}_{0.5}{mathrm{Fe}}_{3}{({mathrm{BO}}_{3})}_{4}$ has attracted the most attention, as it exhibits a multiferroic property with a large, spontaneous, and magnetic-field-induced electric polarization ($P$) below the antiferromagnetic transition temperature (${mathrm{T}}_{N}phantom{rule{4pt}{0ex}}ensuremath{sim}32$ K). This compound has been reported to be noncentrosymmetric (nonpolar) down to the lowest temperature, and the origin of spontaneous electric polarization below ${mathrm{T}}_{N}$ is not known. By utilizing temperature-dependent synchrotron x-ray powder diffraction, we report here the observation of structural phase transition, i.e., the lowering of crystal symmetry from $R32$ to $P{3}_{1}21$ below ${mathrm{T}}_{N}$ in ${mathrm{Ho}}_{0.5}{mathrm{Nd}}_{0.5}{mathrm{Fe}}_{3}{({mathrm{BO}}_{3})}_{4}$, which is further confirmed by single-crystal x-ray diffraction measurements as well as substantiated by dielectric and Raman spectroscopic results. With the help of x-ray resonant magnetic scattering, we have studied the element-specific magnetic ordering behavior, and by combining all the results, we show that the spontaneous electric polarization below the antiferromagnetic ordering transition emerges through the p-d hybridization mechanism associated with the ${mathrm{FeO}}_{6}$ octahedra. The observations of subtle structural changes at low temperature and element-specific magnetic ordering behavior provide a comprehensive understanding of the multiferroicity in this family of compounds." @default.
• W4381853791 created "2023-06-25" @default.
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• W4381853791 date "2023-06-23" @default.
• W4381853791 modified "2023-10-13" @default.
• W4381853791 title "Structural and magnetic interplay in multiferroic <mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML><mml:mrow><mml:msub><mml:mtext>Ho</mml:mtext><mml:mrow><mml:mn>0.5</mml:mn></mml:mrow></mml:msub><mml:msub><mml:mtext>Nd</mml:mtext><mml:mrow><mml:mn>0.5</mml:mn></mml:mrow></mml:msub><mml:msub><mml:mtext>Fe</mml:mtext><mml:mn>3</mml:mn></mml:msub><mml:msub><mml:mrow><mml:mo>(</mml:mo><mml:msub><mml:mtext>BO</mml:mtext><mml:mn>3</mml:mn></mml:msub><mml:mo>)</mml:mo></mml:mrow><mml:mn>4</…" @default.
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• W4381853791 doi "https://doi.org/10.1103/physrevb.107.214106" @default.
• W4381853791 hasPublicationYear "2023" @default.
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