Dy-V magnetic interaction and local structure bias on the complex spin and orbital ordering in Dy$_{1-x}$Tb$_{x}$VO$_3$ (x\,=\,0 and 0.2)

J. -Q. Yan; H. B. Cao; M. A. McGuire; Y. Ren. B. C. Sales; D. G. Mandrus

doi:10.1103/PhysRevB.87.224404

paper

Dy-V magnetic interaction and local structure bias on the complex spin and orbital ordering in Dy $_{1 - x}$ Tb $_{x}$ VO $_{3}$ (x\,=\,0 and 0.2)

arXiv:1306.0513 · doi:10.1103/PhysRevB.87.224404

Abstract

The spin and orbital ordering in Dy $_{1 - x}$ Tb $_{x}$ VO $_{3}$ (x\,=\,0 and 0.2) was studied by measuring x-ray powder diffraction, magnetization, specific heat, and neutron single crystal diffraction. The results show that G-OO/C-AF and C-OO/G-AF phases coexist in Dy $_{0.8}$ Tb $_{0.20}$ VO $_{3}$ in the temperature range 2\,K $\sim$ 60\,K and the volume fraction of each phase is temperature and field dependent. The ordering of Dy moments at T*\,=\,12\,K induces a transition from G-OO/C-AF to a C-OO/G-AF phase. Magnetic fields suppress the long range order of Dy moments and thus the C-OO/G-AF phase below T*. The polarized moments induced at the Dy sublattice by external magnetic fields couple to the V 3d moments and this coupling favors the G-OO/C-AF state. Also discussed is the effect of the Dy-V magnetic interaction and local structure distortion on the spin and orbital ordering in Dy $_{1 - x}$ Tb $_{x}$ VO $_{3}$ .

accepted for publication in Phys. Rev. B

Dy-V magnetic interaction and local structure bias on the complex spin and orbital ordering in Dy1−x​Tbx​VO3​ (x\,=\,0 and 0.2)

Abstract

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Dy-V magnetic interaction and local structure bias on the complex spin and orbital ordering in Dy $_{1 - x}$ Tb $_{x}$ VO $_{3}$ (x\,=\,0 and 0.2)