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

Authors :: Buchter, A.
Nagel, J.
Rüffer, D.
Xue, F.
Weber, D. P.
Kieler, O. F.
Weimann, T.
Kohlmann, J.
Zorin, A. B.
Russo-Averchi, E.
Huber, R.
Berberich, P.
Morral, A. Fontcuberta i
Kemmler, M.
Kleiner, R.
Koelle, D.
Grundler, D.
Poggio, M.
Source :: Phys. Rev. Lett. 111, 067202 (2013)
Publication Year :: 2013
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.<br />Comment: 12 pages, 4 figures

Full Text Access

Tools