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- W6525764 abstract "Thermoelectric (TE) properties of a single nanowire (NW) are investigated in a microlab which allows the determination of the Seebeck coefficient S and the conductivity {sigma}. A significiant influence of the magnetization of a 70 nm ferromagnetic Ni-NW on its power factor S^{2}{sigma} is observed. We detected a strong magneto thermopower effect (MTP) of about 10% and an anisotropic magneto resistance (AMR) as a function of an external magnetic field B in the order of 1%. At T = 295 K and B = 0 T we determined the absolute value of S = - (19 pm 2) {mu}V/K. At zero field the figure of merit ZT approx 0.02 was calculated using the Wiedemann-Franz-law for the thermal conductivity. The thermopower S increases considerably as a function of B up to 10% at B = 0.5 T, and with a magneto thermopower of partialS/partialB approx - (3.8 pm 0,5) {mu}V/(K.T). The AMR and MTP are related by partials/partialr approx -11 pm 1 (partials = partialS/S). The TE efficiency increases in a transversal magnetic field (B =0.5T) due to an enhanced power factor by nearly 20%." @default.
- W6525764 created "2016-06-24" @default.
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- W6525764 date "2011-11-08" @default.
- W6525764 modified "2023-09-27" @default.
- W6525764 title "Thermoelectric power factor of a 70 nm Ni-nanowire in a magnetic field" @default.
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