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Magnetic correlations in deuteronium jarosite, a model S=5/2 Kagome antiferromagnet | | A.S. Wills
; A Harrison
; S.A.M. Mentink
; T.E. Mason
; Z. Tun
; | | Date: |
15 Jul 1996 | | Subject: | cond-mat | | Affiliation: | University of Edinburgh), A Harrison (University of Edinburgh), S.A.M. Mentink (University of Toronto), T.E. Mason (University of Toronto), and Z. Tun (Chalk River Laboratories | | Abstract: | Deuteronium jarosite, (D_3O)Fe_3(SO_4)_2(OD)_6, contains a kagome lattice of Heisenberg spins, S=5/2, with a coverage of 97+-1%. DC and AC susceptibility measurements show strong in-plane antiferromagnetic exchange ( heta_CW=-1500+-300K) and a spin-glass transition at T_f=13.8 K, while the magnetic contribution to the specific heat below T_f rises with T as T^2, characteristic of two-dimensional propagating modes. Powder neutron diffraction reveals short-range magnetic correlations (xsi=19+-2 AA) with a wavevector corresponding to the sqrt{3}xsqrt{3} spin structure at 1.9 K. | | Source: | arXiv, cond-mat/9607106 | | Services: | Forum | Review | PDF | Favorites | |
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