Título:
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Magnetic transition in highly frustrated SrCr8Ga4O19: The archetypal kagomé system
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Autor/a:
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Martínez Benjamin, Joan Josep; Labarta, Amílcar; Rodríguez Solá, Raúl; Obradors, Xavier
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Otros autores:
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Universitat de Barcelona |
Abstract:
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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. |
Materia(s):
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-Materials magnètics -Propietats magnètiques -Magnetic materials -Magnetic properties |
Derechos:
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(c) The American Physical Society, 1994
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Tipo de documento:
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Artículo Artículo - Versión publicada |
Editor:
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The American Physical Society
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Compartir:
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