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Article Dans Une Revue Physical Review Applied Année : 2018

Towards Thermal Reading of Magnetic States in Hall Crosses

Y. Xu
  • Fonction : Auteur
S. Petit-Watelot
F. Montaigne
S. Mangin
M. Hehn
D. Lacour

Résumé

The 3ω method is a standard way to measure the thermal conductivity of thin films. In this study, we apply the method to read the magnetic state of a perpendicularly magnetized CoTb ferrimagnetic Hall cross using a thermal excitation. In order to generate the thermal excitation, an oscillating current at an ω frequency is applied to the Hall cross using different geometries. The magnetic signals oscillating at ω, 2ω, and 3ω are probed using a lock-in technique. From the analysis of the power dependence, we can attribute the 3ω response to the temperature oscillation and the 2ω to the temperature-gradient oscillation. Finally, the frequency dependence of the magnetic signals can be understood by considering the heat diffusion in a two-dimensional model
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Dates et versions

hal-01814995 , version 1 (29-06-2018)

Identifiants

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Y. Xu, S. Petit-Watelot, V. Polewczyk, G. Parent, F. Montaigne, et al.. Towards Thermal Reading of Magnetic States in Hall Crosses. Physical Review Applied, 2018, 9, pp.034028. ⟨10.1103/PhysRevApplied.9.034028⟩. ⟨hal-01814995⟩
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