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arXiv · 1305.6481

Reversal mechanism of an individual Ni nanotube simultaneously studied by torque and SQUID magnetometry

A. Buchter·J. Nagel·D. Rüffer·F. Xue·D. P. Weber·O. F. Kieler·T. Weimann·J. Kohlmann·A. B. Zorin·E. Russo-Averchi·R. Huber·P. Berberich·A. Fontcuberta i Morral·M. Kemmler·R. Kleiner·D. Koelle·D. Grundler·M. Poggio
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Abstract

Using an optimally coupled nanometer-scale superconducting quantum interference device, we measure the magnetic flux originating from an individual ferromagnetic Ni nanotube attached to a Si cantilever. At the same time, we detect the nanotube's volume magnetization using torque magnetometry. We observe both the predicted reversible and irreversible reversal processes. A detailed comparison with micromagnetic simulations suggests that vortex-like states are formed in different segments of the individual nanotube. Such stray-field free states are interesting for memory applications and non-invasive sensing.

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A. Buchter, J. Nagel, D. Rüffer, F. Xue, D. P. Weber, O. F. Kieler, T. Weimann, J. Kohlmann, A. B. Zorin, E. Russo-Averchi, R. Huber, P. Berberich, A. Fontcuberta i Morral, M. Kemmler, R. Kleiner, D. Koelle, D. Grundler, M. Poggio. 2013-07-18. Reversal mechanism of an individual Ni nanotube simultaneously studied by torque and SQUID magnetometry. https://doi.org/10.1103/physrevlett.111.067202

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