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- W2073456738 abstract "The effect of hydrostatic pressure on crystal-field (CF) levels of ${mathrm{Nd}}^{3+}$ in ${mathrm{Nd}}_{2}{mathrm{CuO}}_{4}$ has been studied. Raman spectroscopy was used to measure the pressure dependences of two CF transitions near 750 ${mathrm{cm}}^{ensuremath{-}1}$ and 1995 ${mathrm{cm}}^{ensuremath{-}1}$ at $T=5$ K. On the basis of the superposition model and an ab initio method we calculated the CF level energies as a function of pressure. Good agreement with the experimental data is found for the 750-${mathrm{cm}}^{ensuremath{-}1}$ excitation while deviations in case of the 1995-${mathrm{cm}}^{ensuremath{-}1}$ transitions can be attributed to changes of the free-ion parameters of the Hamiltonian. Pressure-induced changes in the splitting of the 1995-${mathrm{cm}}^{ensuremath{-}1}$ doublet are interpreted considering the anisotropy of the Nd-Cu exchange coupling. Experiments at $T=44$ K indicate a possible pressure-induced magnetic reorientation transition similar to what was observed earlier around $T=30$ K as a function of temperature." @default.
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- W2073456738 date "2001-11-12" @default.
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- W2073456738 title "Raman study of crystal-field excitations in<mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML display=inline><mml:mrow><mml:msub><mml:mrow><mml:mi mathvariant=normal>Nd</mml:mi></mml:mrow><mml:mrow><mml:mn>2</mml:mn></mml:mrow></mml:msub></mml:mrow><mml:mrow><mml:msub><mml:mrow><mml:mi mathvariant=normal>CuO</mml:mi></mml:mrow><mml:mrow><mml:mn>4</mml:mn></mml:mrow></mml:msub></mml:mrow></mml:math>under pressure" @default.
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- W2073456738 doi "https://doi.org/10.1103/physrevb.64.214106" @default.
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