High-field Mössbauer study of the randomly canted Li-Fe-Ti system

Seqqat, M.; Dormann, J.L.; Noguès, M.; Jové, J.; Nicoara, G.

doi:10.1007/bf02063733

Cited by 2 publications

(1 citation statement)

References 2 publications

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“…The properties of the three systems C [45][46][47], D [39,48] and E [40,49,50] for the compositions studied are similar. A non-linear continuous increase of the magnetization with the applied field is observed at all temperatures until H = 20 T. This means that canted spin structure occurs for any temperature lower than T N .…”

Section: General Properties Of the Systems Studiedmentioning

confidence: 83%

Critical analysis of magnetically semi-disordered systems: critical exponents at various transitions

Belayachi

Dormann

Noguès

1998

J. Phys.: Condens. Matter

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The critical analysis of various magnetically semi-disordered compounds with spinel structure is reported. The magnetic equation of state is valid in the vicinity of the different observed transitions and the critical exponents are determined by different methods. At the magnetic-paramagnetic transition, the critical exponents and are larger and smaller respectively than those found for 3D Heisenberg ferromagnets. The exponent variations are explained phenomenologically and allow a classification of the compounds to be made according to the degree of disorder. At low temperature, for some materials a mixed state occurs below the re-entrant transition, characterized by critical exponents, while for other materials local canted states exist, where the transverse spin components block progressively, revealing an absence of a true phase transition. At high temperature, a well established spin-cluster regime occurs in some cases. Two transitions with critical exponents are evident, the magnetic-cluster and the cluster-paramagnetic transitions.

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Section: General Properties Of the Systems Studiedmentioning

confidence: 83%

Critical analysis of magnetically semi-disordered systems: critical exponents at various transitions

Belayachi

Dormann

Noguès

1998

J. Phys.: Condens. Matter

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Order−Disorder Transitions and Magnetic Behaviour in Lithium Ferrites Li_0.5+0.5_xFe_2.5−1.5_xTi_xO₄ (x = 1.28 and 1.50)

et al. 2003

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We report the structural characterization and magnetic behaviour of the spinels with general formula Li0.5+0.5xFe2.5−1.5xTixO4, where x = 1.28 and 1.50. When the samples are cooled slowly, a 1:3 crystallographic order occurs, whereas a random disorder is observed when the samples are quenched. Neutron‐powder‐diffraction measurements were performed on the materials to characterize the structural transitions. Magnetic properties were studied by magnetic susceptibility (dc and ac), magnetisation and neutron‐diffraction data and the results can be interpreted on the basis of a spin‐glass behaviour. (© Wiley‐VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2003)

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High-field Mössbauer study of the randomly canted Li-Fe-Ti system

Cited by 2 publications

References 2 publications

Critical analysis of magnetically semi-disordered systems: critical exponents at various transitions

Critical analysis of magnetically semi-disordered systems: critical exponents at various transitions

Order−Disorder Transitions and Magnetic Behaviour in Lithium Ferrites Li_0.5+0.5_xFe_2.5−1.5_xTi_xO₄ (x = 1.28 and 1.50)

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High-field Mössbauer study of the randomly canted Li-Fe-Ti system

Cited by 2 publications

References 2 publications

Critical analysis of magnetically semi-disordered systems: critical exponents at various transitions

Critical analysis of magnetically semi-disordered systems: critical exponents at various transitions

Order−Disorder Transitions and Magnetic Behaviour in Lithium Ferrites Li0.5+0.5xFe2.5−1.5xTixO4 (x = 1.28 and 1.50)

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Order−Disorder Transitions and Magnetic Behaviour in Lithium Ferrites Li_0.5+0.5_xFe_2.5−1.5_xTi_xO₄ (x = 1.28 and 1.50)