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Article Dans Une Revue Journal of Physics D: Applied Physics Année : 2020

Magnetic correlations in polycrystalline Tb 0.15 Co 0.85

Résumé

We investigated a polycrystalline sample of the ferrimagnetic compound Tb0.15Co0.85 by magnetometry and small-angle neutron scattering (SANS). The magnetization curve at 300 K is characteristic for soft ferrimagnets but at 5 K the hysteresis indicates the existence of magnetic domains. The magnetic SANS signal suggests that at 300 K the Tb and Co moments are correlated over large volumes within the micrometer-sized grains with correlation lengths >100 nm. At 5 K, however, the magnetic SANS analysis reveals a reduced correlation length of around 4.5 nm, which indicates the formation of narrow magnetic domains within the ferrimagnet with one dimension being in the nm range. We attribute the observed changes of the domain structure to the temperature-dependence of the magnetic properties of the Tb sublattice.
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hal-04370037 , version 1 (03-02-2024)

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Paternité - Pas d'utilisation commerciale - Pas de modification

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Mathias Bersweiler, Philipp Bender, Inma Peral, Lucas Eichenberger, Michel Hehn, et al.. Magnetic correlations in polycrystalline Tb 0.15 Co 0.85. Journal of Physics D: Applied Physics, 2020, 53 (33), pp.335302. ⟨10.1088/1361-6463/ab8b95⟩. ⟨hal-04370037⟩
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