Flopside structure

Furrer and Kaldis (1976) have measured the excitations in a single crystal of HoP at a variety of temperatures. Even though this material orders in a flopside structure (see section 3.5), very little -dependence of the modes was observed. Some temperature renormalization for some of the modes was obser- ved. The spectra were fitted to a single ion molecular field model including... 

The word flopside structure has been introduced to characterize a biaxial magnetic structure observed in the cubic HoP compound (Fischer et al. 1985). As shown in fig. 121 the propagation vector is and the structure is formed as... 

Fig. 122. A simple picture of the frustration (a) if two moments are antipatallel in order to satisfy the negative interaction (J <0), the direction of the third cannot be antiparallel to both of the others Fig. 121. Flopside magnetic structure of (b) under certain conditions the system finds a compromise through the HoP cubic compound. a triangular magnetic structure.

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