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- W2136455474 abstract "We measured the effect of pressure (P ⩽ 10 GPa) on 2-magnon excitations (T = 10 K) and on lattice parameters (T = 300 K) of K2NiF4 by Raman spectroscopy and X-ray diffraction respectively. The results allow us to determine the dependence of the superexchange interaction J on the transition metal to anion distance d. We find that J scales as Jαd−n with n = 9.5 ± 0.5. Previous measurements of 2-magnon excitations under pressure in NiO (n ≈ 7–8), La2CuO4 and Eu2CuO4 (n ≈ 5–6) are analyzed and an explanation for the trends in the pressure dependence of the superexchange interaction J is proposed." @default.
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- W2136455474 date "1993-08-01" @default.
- W2136455474 modified "2023-09-29" @default.
- W2136455474 title "Effect of pressure on 2-magnon Raman scattering in K2NiF4" @default.
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- W2136455474 doi "https://doi.org/10.1016/0921-5093(93)90279-n" @default.
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