Títol:
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Noncritical behavior and remanent magnetization in magnetically frustrated FeSbO4
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Autor/a:
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Labarta, Amílcar; Rodríguez Solá, Raúl; Balcells i Argemí, Lluís; Tejada Palacios, Javier; Obradors, Xavier; Berry, Frank J., 1947-
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Altres autors:
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Universitat de Barcelona |
Abstract:
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Low-field dc-magnetization and thermoremanent-magnetization measurements have been recorded from the rutile-related iron antimonate of composition
FeSbO
4
. The zero-field-cooled susceptibility curve at low magnetic fields (H=20 Oe) shows a small peak at ∼72 K and a much broader peak at lower temperatures of ∼25 K. The temperature dependence of the remanent magnetization below ∼72 K indicates the existence of two different relaxation regimes which depend on the strength of the applied field in which the sample was cooled. The thermoremanent-magnetization measurements as a function of time show aging effects and the characteristic parameters are quite similar to those found in canonical spin glasses. The temperature dependence of the first nonlinear coefficient
b
3
in the expansion of the magnetization in odd powers of (
a
1
H) shows no divergence around the peak at 72 K, which is indicative of the absence of a true spin-glass transition. The moderate degree of frustation associated with an inhibited antiferromagnetic transition at ∼72 K, is nevertheless insufficient to produce a true spin-glass transition where the magnetic correlation length is even much shorter. |
Matèries:
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-Magnetic materials -Ressonància paramagnètica electrònica -Relaxació (Física nuclear) -Materials magnètics -Electron paramagnetic resonance -Relaxation (Nuclear physics) |
Drets:
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(c) The American Physical Society, 1991
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Tipus de document:
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Article Article - Versió publicada |
Publicat per:
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The American Physical Society
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Compartir:
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