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|Magnetic transition in highly frustrated SrCr8Ga4O19: The archetypal kagomé system
|Martínez Benjamin, Joan Josep
Rodríguez Solá, Raúl
|The American Physical Society
|Both dc and ac magnetic susceptibility have been carefully measured and analyzed in order to determine the features of the low-temperature magnetic state of the highly frustrated SrCr 8 Ga 4 O 19 compound. The scaling analysis of the nonlinear part of the dc magnetic susceptibility gives clues that indicate that the nature of the magnetic state below T f does not correspond to a conventional spin glass. This idea is further confirmed by the study of the dynamic scaling that also differs from what is expected for a conventional spin glass. A progressive change towards a more conventional magnetic ordering below T f is observed by substituting Ga atoms by Fe atoms in the compound SrCr 8 Ga 4 − 2 x Fe x O 19 . For x=1.5, both the scaling analysis of the nonlinear part of the dc magnetic susceptibility and the dynamic scaling seem to indicate that a true spin-glass phase transition does exist at T f . This change in the magnetic behavior is attributed to the fact that the presence of a magnetic atom in the 4 f VI sites as a first neighbor of the Cr atoms, located in the 12k sites, will impose a ‘‘local preferential direction’’ for the magnetic moments removing somehow the strong intrinsic magnetic frustration of the kagomé lattice.
|Reproducció digital del document publicat en format paper, proporcionada per PROLA i http://dx.doi.org/10.1103/PhysRevB.50.15779
|It is part of:
|Physical Review B, 1994, vol. 50, núm. 21, p. 15779-15786.
|Appears in Collections:
|Articles publicats en revistes (Física de la Matèria Condensada)
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