Reversal Mechanism of an Individual Ni Nanotube Simultaneously Studied by Torque and SQUID Magnetometry

Using an optimally coupled nanometer-scale SQUID, 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 vortexlike states are formed in different segments of the individual nanotube. Such stray-field free states are interesting for memory applications and noninvasive sensing.


Publié dans:
Physical Review Letters, 111, 6, 067202
Année
2013
Publisher:
College Pk, American Physical Society
ISSN:
0031-9007
Laboratoires:




 Notice créée le 2013-10-01, modifiée le 2018-12-03

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