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- W2092305791 abstract "Liquid-helium temperature electron paramagnetic resonance (EPR) spectra of the ${mathrm{Er}}^{3+}$ ion in single crystals of ${mathrm{Ho}}_{x}{mathrm{Y}}_{1ensuremath{-}x}{mathrm{VO}}_{4}$ $(x=0.02--1.0)$ are exploited to reveal the influence of the crystal-field and ${mathrm{Er}}^{3+}{ensuremath{-}mathrm{H}mathrm{o}}^{3+}$ interactions. The ${mathrm{Er}}^{3+}$ g value at 4 K in the lightly doped samples $(x<0.3)$ was here successfully accounted for by the estimated crystal-field parameters ${(mathrm{c}mathrm{m}}^{mathrm{ensuremath{-}}1}$): ${B}_{2}^{0}=ensuremath{-}108.0,$ ${B}_{4}^{0}=40.0,$ ${B}_{6}^{0}=ensuremath{-}40.0,$ ${B}_{4}^{4}=ensuremath{-}949.0,$ ${B}_{6}^{4}=26.0,$ while that in the concentrated paramagnetic samples $(x=0.9,$ 1.0) by the parameters ${(mathrm{c}mathrm{m}}^{mathrm{ensuremath{-}}1}$): ${B}_{2}^{0}=ensuremath{-}114.8,$ ${B}_{4}^{0}=46.9,$ ${B}_{6}^{0}=ensuremath{-}43.8,$ ${B}_{4}^{4}=ensuremath{-}971.4,$ ${B}_{6}^{4}=91.9.$ The shift of the ${mathrm{Er}}^{3+}$ g value in the paramagnetic ${mathrm{Ho}}_{x}{mathrm{Y}}_{1ensuremath{-}x}{mathrm{VO}}_{4}$ crystals $(x=0.9,$ 1.0) from that in the diamagnetic ${mathrm{YVO}}_{4}$ crystal has been analyzed to estimate the value of the parameter ensuremath{gamma} (=-2.2 ${mathrm{cm}}^{mathrm{ensuremath{-}}1}$) describing the diagonal element of the symmetric tensor representing ${mathrm{Ho}}^{3+}{ensuremath{-}mathrm{E}mathrm{r}}^{3+}$ interactions. The unresolved EPR linewidth of the ${mathrm{Er}}^{3+}$ ion is accounted for by the indirect superhyperfine interaction ${(A}_{ensuremath{parallel}})$ of the ${mathrm{Er}}^{3+}$ ion with the surrounding ${}^{165}mathrm{Ho}$ nuclei, estimating ${A}_{ensuremath{parallel}}=0.0026{mathrm{cm}}^{mathrm{ensuremath{-}}1}.$ In addition, the absolute value of the parameter ensuremath{varepsilon}, an off-diagonal element of the antisymmetric tensor describing ${mathrm{Ho}}^{3+}{ensuremath{-}mathrm{E}mathrm{r}}^{3+}$ interactions, has been estimated to be $|ensuremath{varepsilon}|=0.029{mathrm{cm}}^{mathrm{ensuremath{-}}1}.$" @default.
- W2092305791 created "2016-06-24" @default.
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- W2092305791 date "2001-08-15" @default.
- W2092305791 modified "2023-09-27" @default.
- W2092305791 title "EPR study ofEr3+crystal-field and165Ho3+−Er3+interactions in single crystals ofHoxY1−xVO4(x=0.02–1.00)" @default.
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- W2092305791 doi "https://doi.org/10.1103/physrevb.64.094435" @default.
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