Magnetothermoelectric power in Co/Pt layered structures: Interface versus bulk contributions
Frauen A, Kobs A, Boehnert T, Michel AK, Winkler G, Nielsch K, Oepen HP (2015)
Publication Type: Journal article
Publication year: 2015
Journal
Book Volume: 92
Article Number: 140402
Journal Issue: 14
DOI: 10.1103/PhysRevB.92.140402
Abstract
The dependence of the longitudinal thermoelectric power on the orientation of magnetization in Pt/Co/Pt sandwiches is investigated. In the Co thickness range ≤6 nm, where interface scattering is relevant, the thermoelectric power depends on the orientation of magnetization in the plane perpendicular to the temperature gradient. This behavior reveals the thermoelectric analog to the anisotropic interface magnetoresistance. It is shown that this interfacial magnetothermoelectric power fulfills Mott's formula, however, significant deviations from the bulk anisotropic magnetothermoelectric behavior are reported. The dependence of the Seebeck effect on magnetization orientation therefore provides experimental evidence of differences in the electronic states of the bulk and interface. We demonstrate that for the very same system the Seebeck coefficient does not show a one-to-one correspondence to the conductivity.
Involved external institutions
Germany (DE)How to cite
APA:
Frauen, A., Kobs, A., Boehnert, T., Michel, A.-K., Winkler, G., Nielsch, K., & Oepen, H.P. (2015). Magnetothermoelectric power in Co/Pt layered structures: Interface versus bulk contributions. Physical Review B - Condensed Matter and Materials Physics, 92(14). https://dx.doi.org/10.1103/PhysRevB.92.140402
MLA:
Frauen, Axel, et al. "Magnetothermoelectric power in Co/Pt layered structures: Interface versus bulk contributions." Physical Review B - Condensed Matter and Materials Physics 92.14 (2015).
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