Magnetic structures have been determined by netron diffraction for several compositions in the superconducting mixed ternary system Ho(Rh1-xIrx)4B4. Two features previously reported to occur in the heat capacity for some compositions are shown to correspond to successive magnetic transitions. For x=0.30 and 0.45, neutron diffraction peaks for the lowest temperature structure develop over a timescale of many hours. The results are discussed in terms of magnetic frustration.
S. E. Lambert et al., "Time-dependent Magnetic Structures of the Superconducting Mixed Ternary System Ho(Rh1-xIrx)4B4," Physical Review B, vol. 32, no. 5, pp. 2902-2908, American Physical Society, Sep 1985.
The definitive version is available at http://dx.doi.org/10.1103/PhysRevB.32.2902
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