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Pressure dependence of the exchange interaction in La2CuO4


We report the results of Raman scattering measurements which determine the pressure dependence of the in-plane exchange coupling constant J in magnetic La2CuO4 for pressure between 1bar and 100 kbar. We find that pressure increases the Neel temperature TN much more rapidly than J. This result together with the theory for a quasi two-dimensional magnetic system then suggests that the interplanar exchange coupling decreases with pressure. © 1991.

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