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- W1965767807 abstract "The electron paramagnetic resonance spectrum of manganese in a single crystal of Sn${mathrm{O}}_{2}$ (cassiterite) was investigated at $K$ and ${K}_{A}$ band frequencies at a temperature of 77ifmmode^circelsetextdegreefi{}K. The manganese atoms occupy ${mathrm{Sn}}^{4+}$ substitutional sites giving the same charge with a resulting spin ground state of $S=frac{3}{2}$. The hyperfine structure (HFS) with $I=frac{5}{2}$ and the superhyperfine structure (SHFS) show large anisotropies which can be explained by the relatively large values of $D$ and $E$ in the spin-Hamiltonian. The strong overlaps of the wave functions of the central manganese ion with those of the nearest-neighbor tins along the $C$ axis accounts for the large SHFS, $a=34$ G. An attempt to explain these data from the experimental evidence is given. The spin-Hamiltonian and the constants for the $C$ axis and magnetic $Z$ axis coincident are $H=ensuremath{beta}mathrm{S}ifmmodecdotelsetextperiodcenteredfi{}gifmmodecdotelsetextperiodcenteredfi{}mathrm{H}+D[{{S}_{z}}^{2}ensuremath{-}frac{1}{3}S(S+1)]+E({{S}_{x}}^{2}ensuremath{-}{{S}_{y}}^{2})+mathrm{S}ifmmodecdotelsetextperiodcenteredfi{}Aifmmodecdotelsetextperiodcenteredfi{}mathrm{I}+ensuremath{Sigma}stackrel{2}{i=1}mathrm{S}ifmmodecdotelsetextperiodcenteredfi{}{a}_{i}ifmmodecdotelsetextperiodcenteredfi{}{mathrm{I}}_{mathrm{Sn}}.$ In addition, the resonance results obtained for ${mathrm{Mn}}^{4+}$ in Sn${mathrm{O}}_{2}$ are compared with those obtained for ${mathrm{Cr}}^{3+}$ and ${mathrm{V}}^{4+}$ in Sn${mathrm{O}}_{2}$ and for ${mathrm{Cr}}^{3+}$, ${mathrm{V}}^{4+}$, and ${mathrm{Mn}}^{4+}$ in Ti${mathrm{O}}_{2}$." @default.
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- W1965767807 date "1964-08-03" @default.
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- W1965767807 title "Hyperfine and Superhyperfine Structure of Manganese in Sn<mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML display=inline><mml:mrow><mml:msub><mml:mrow><mml:mi mathvariant=normal>O</mml:mi></mml:mrow><mml:mrow><mml:mn>2</mml:mn></mml:mrow></mml:msub></mml:mrow></mml:math>" @default.
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- W1965767807 doi "https://doi.org/10.1103/physrev.135.a710" @default.
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