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MA: Fachverband Magnetismus
MA 3: Micro- and nanostructured Materials
MA 3.3: Talk
Monday, March 7, 2016, 10:00–10:15, H32
Efficient high frequency rectification using CIP-GMR nanowires — •Philip Trempler1 and Georg Schmidt1,2 — 1Institut für Physik, Martin-Luther-Universität Halle-Wittenberg, Germany — 2Interdisziplinäres Zentrum für Materialwissenschaften, MLU Halle-Wittenberg, Germany
We have recently shown [1] that by the help of in-plane spin-valve-nanowires alternating currents can be rectified. The nanowires consist of layer stack designed for current-in-plane (CIP) giant magnetoresistance (GMR). In the wires we use a 90∘ alignment of exchange bias of the fixed electrode and shape anisotropy of the free magnetic layer. In such a structure the Oersted field created by an AC current leads to a modulation of the conductivity that ultimately results in the creation of a DC voltage and thus rectification. We present experiments to maximize the efficiency of the rectification process and to combine several identical wires to obtain maximum DC voltage while maintaining a 50 Ω impedance suitable for high frequencies. [1] J. Kleinlein, B. Ocker, G. Schmidt, Appl. Phys. Lett. 104, 153507 (2014)