Variation of the lattice and spin dynamics in Bi1- xDyxFeO3 nanoparticles

Hsiang Lin Liu, Y. C. Su, Y. H. Tang, J. G. Lin

研究成果: 雜誌貢獻文章

1 引文 斯高帕斯(Scopus)

摘要

Infrared and Raman-scattering spectroscopies were employed to explore the lattice and spin dynamics of Bi1-xDyxFeO 3 nanoparticles. With increasing substitution of Bi by Dy in the range of 0.00 ≤ x ≤ 0.40, we observe (1) evidence for an increase of local lattice distortion of the FeO6 octahedra, and significant changes of phonon parameters in the x = 0.15 sample, corresponding to the structural transformation from rhombohedral to orthorhombic, (2) the chemically substituted enhanced dielectric constant of 43.4 in the x = 0.20 sample, (3) the development of two-magnon excitations in Dy substituted samples, which sensitively gauges the modification of magnetic structures from a cycloidal spin to a homogeneous magnetized state, and (4) Dy substitution disrupts the lattice-spin interactions at high temperatures. These findings extend our understanding of tailoring the structural and magnetic properties of chemically substituted multiferroic nanoparticles and advance the technologically important development of these materials.

原文英語
文章編號133506
期刊Journal of Applied Physics
115
發行號13
DOIs
出版狀態已發佈 - 2014 四月 7

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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