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MA: Fachverband Magnetismus
MA 47: Spincaloric Transport I (jointly with TT)
MA 47.3: Talk
Thursday, April 3, 2014, 17:15–17:30, HSZ 403
Magneto-thermopower and Magnetoresistance of single Co-Ni alloy Nanowires — •Tim Böhnert1, Victor Vega2, Ann-Kathrin Michel1, Victor M. Prida2, and Kornelius Nielsch1 — 1Universität Hamburg, Hamburg, Germany — 2Universidad de Oviedo, Oviedo, Spain
The magneto-thermopower is measured and correlated to the anisotropic magnetoresistance of Co-Ni alloyed nanowires with varying composition. The highest absolute and relative variation of the Seebeck coefficient in perpendicularly applied magnetic fields at room temperature are determined to be 1.5 µVK−1 for Co0.24Ni0.76 and 8.1 % for Co0.39Ni0.61 nanowires. Power factors of 3.7 mW/mK2 have been achieved, which is competitive with common thermoelectric materials like Bi2Te3. For Co-Ni nanowires containing up to 39 % Co a linear relationship between the magnetic field dependent change of the Seebeck coefficient and the electrical conductivity is found.