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The compound UPtGe is the only 5f system known to possess an incommensurate helical structure. The nature of this unique magnetic structure is studied within density-functional theory, and we show that the formation of a helical arrangement results from the coexistence of accidentally small in-plane magnetic an- isotropy and frustrated exchange interactions. The system is not, however, a pure exchange helix since the Dzyaloshinski-Morija interaction plays an important role and the magnetic structure possesses features inherent only for relativistic helices.

Additional information

Authors: SANDRATSKII L.M, Institut fur Festkorperphysik, Technische Universitat, Darmstadt (DE);LANDER G.H, EC-JRC, Institute for Transuranium Elements, Karlsruhe (DE)
Bibliographic Reference: An article published in: Physical Review Letters B, vol.63 (2001) pp.134436-1 to 134436-6
Record Number: 200013500 / Last updated on: 2001-07-24
Original language: en
Available languages: en