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  Reehuis, M.; Fehrmann, B.; Wolff, M. W.; Jeitschko, W.; Hofmann, M.: Antiferromagnetic order in TbFe₂Al₁₀ and DyFe₂Al₁₀. Physica B 276-278 (2000), p. 594-595

10.1016/S0921-4526(99)01787-1

Abstract:
The magnetic properties of the orthorhombic aluminides TbFe2Al10, DyFe2Al10 and HoFe2Al10 have been investigated by neutron powder diffraction. Below the Neel temperatures T(N) = 16.5(5) and T(N) = 7.5(5)K the terbium and dysprosium moments show incommensurate magnetic order with the wave vectors k = (0, 0.7977, 0) and k = (0, 0.7836, 0), respectively. TbFe2Al10 shows a square wave modulated magnetic ordering of the terbium sublattice with a moment direction parallel to the a-axis. In DyFe2Al10 the dysprosium moments rotate within the nc-plane forming a helical. magnetic structure. For HoFe2Al10 no magnetic order could be observed down to 1.5 K. (C) 2000 Elsevier Science B.V. All rights reserved.