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- Title
Low-temperature incommensurate magnetic order in R[sub 2] BaCoO[sub 5] [R = rare earth].
- Authors
Hernández-Velasco, J.; Sáez-Puche, R.; Hoser, A.; Rodríguez-Carvajal, J.
- Abstract
R[sub 2]BaCoO[sub 5] oxides, with R = Er, Tm, Lu and Y, show incommensurate (I) magnetic order below T[sub N] = 3.5 K. The Er compound remains as an I-magnetic structure down to T = 40 mK and the Y one shows the coexistence of both commensurate (C) and I structures in the vicinity of a Lifshitz point. Both facts are quite uncommon. A devil's staircase behaviour in helimagnetic Tm[sub 2]BaCoO[sub 5] is observed at 1.4 K<T<2.5 K. A sudden collapse of a sine-wave modulation of Co moments to a C-magnetic structure is evidenced in Lu[sub 2]BaCoO[sub 5] at T = 2.5 K with Co magnetic moments µ ∼ 3.9 µ[sub B] lying in the xy plane.
- Subjects
OXIDES; BARIUM carbonate; MAGNETIC structure; METALS
- Publication
Applied Physics A: Materials Science & Processing, 2002, Vol 74, Issue 6, ps781
- ISSN
0947-8396
- Publication type
Article