Magnetic Phase Diagram of Bi₂CuO₄
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The ground state spin configuration in Bi₂CuO₄-type crystal having two magnetic ions in the unit cell is studied on the basis of the Heisenberg model with four kinds of superexchange interaction. The magnetic phase diagram is found to be composed of five regions: four of wich are collinear spin arrangement and one is of double helical spin arrangement. The values of exchange integrals of Bi₂CuO₄ estimated by Aïn et al from their own neutron scattering data are in the region where the observed collinear spin arrangement is stabilized.
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- Magnetic Phase Diagram of Bi₂CuO₄