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Spin-glass behaviour in mixed metal oxides with a rutile-type structure
Labarta, Amílcar; Obradors, Xavier; Tejada Palacios, Javier; Berry, Frank J., 1947-; Sarson, M.
Universitat de Barcelona
We report here on the magnetic properties of compounds of composition Fe1−xCrxSbO4 and Fe1−xGaxSbO4. The introduction of paramagnetic Cr3+ and diamagnetic Ga3+ into the rutile‐related iron antimonate lattice does not destroy the antisite atomic ordering which exists in iron antimonate of composition FeSbO4. The initial slope of the Curie temperature dependence on x is similar in both series, indicating that Fe3+‐Cr3+ interactions are very small. The magnetic susceptibility measurements recorded from the compounds of composition Fe1−xCrxSbO4, x<0.4, and Fe0.9Ga0.1SbO4 show them to behave as spin glasses at low temperatures. The inhibition of compounds of the type Fe1−xCrxSbO4, x>0.4, and Fe1−xGaxSbO4, x>0.1 to undergo a spin‐glass transition above 4.2 K is associated with a dilution effect.
2012-10-09
Vidres de spin
Propietats magnètiques
Efecte Mössbauer
Metall-òxid-semiconductors
Spin glasses
Magnetic properties
Mössbauer effect
Metal oxide semiconductors
(c) American Institute of Physics , 1988
Article
info:eu-repo/semantics/publishedVersion
American Institute of Physics
         

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