Magnetic Structures of Ferrimagnetic RbNiF3 and CsFeF3

Abstract
Powder neutron diffraction measurements have been taken on the hexagonal fluorides RbNiF3 and CsFeF3. The results are consistent with a ferrimagnetic model having antiparallel 2a and 4f site spins, the spin axis being perpendicular to and 75° from the c axis, respectively. Possible origins of the discrepancy of this latter value from magnetization data are discussed.

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