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Incommensurate magnetic order in Ag$_{2}$NiO$_{2}$ | | J. Sugiyama
; Y. Ikedo
; K. Mukai
; J. H. Brewer
; E. J. Ansaldo
; G. D. Morris
; K. H. Chow
; H. Yoshida
; Z. Hiroi
; | | Date: |
9 Jun 2006 | | Subject: | Strongly Correlated Electrons; Materials Science | | Abstract: | The nature of the magnetic transition of the half-filled triangular antiferromagnet Ag$_{2}$NiO$_2$ with $T_{
m N}$=56K was studied with positive muon-spin-rotation and relaxation ($mu^+$SR) spectroscopy. Zero field $mu^+$SR measurements indicate the existence of a static internal magnetic field at temperatures below $T_{
m N}$. Two components with slightly different precession frequencies and wide internal-field distributions suggest the formation of an incommensurate antiferromagnetic order below 56 K. This implies that the antifrerromagnetic interaction is predominant in the NiO$_2$ plane in contrast to the case of the related compound NaNiO$_2$. An additional transition was found at $sim$22 K by both $mu^+$SR and susceptibility measurements. It was also clarified that the transition at $sim$260 K observed in the susceptibility of Ag$_{2}$NiO$_{2}$ is induced by a purely structural transition. | | Source: | arXiv, cond-mat/0606229 | | Services: | Forum | Review | PDF | Favorites | |
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