Based on the relaxation time approximation, the mean collision time for magnon scattering zc(T) is computed from the experimental spin Seebeck coefficient of a bulk YIG/ Pt bilayer. The scattering results to be composed by two processes: the low temperature one, with a T-1/2 dependence, is attributed to the scattering by defects and provides a mean free path around 10 mu m; the high temperature one, depending on T-4, is associated to the scattering by other magnons. The results are employed to predict the thickness dependence of the spin Seebeck coefficient for thin films.

Temperature dependence of the mean magnon collision time in a spin Seebeck device / Basso, Vittorio; Sola, Alessandro; Ansalone, Patrizio; Kuepferling, Michaela. - In: JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS. - ISSN 0304-8853. - 538(2021), p. 168289. [10.1016/j.jmmm.2021.168289]

Temperature dependence of the mean magnon collision time in a spin Seebeck device

Basso, Vittorio;Sola, Alessandro;Ansalone, Patrizio;Kuepferling, Michaela
2021

Abstract

Based on the relaxation time approximation, the mean collision time for magnon scattering zc(T) is computed from the experimental spin Seebeck coefficient of a bulk YIG/ Pt bilayer. The scattering results to be composed by two processes: the low temperature one, with a T-1/2 dependence, is attributed to the scattering by defects and provides a mean free path around 10 mu m; the high temperature one, depending on T-4, is associated to the scattering by other magnons. The results are employed to predict the thickness dependence of the spin Seebeck coefficient for thin films.
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS
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Utilizza questo identificativo per citare o creare un link a questo documento: http://hdl.handle.net/11696/73454
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