Magnetic states of an individual Ni nanotube probed by anisotropic magnetoresistance

Rüffer, Daniel; Huber, Rupert; Berberich, P.; Albert, Stephan; Russo-Averchi, Eleonora; Heiß, Martin; Arbiol, Jordi; Morral, Anna Fontcuberta i; Grundler, D.

doi:10.1039/c2nr31086d

Cited by 77 publications

(116 citation statements)

References 42 publications

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“…In 2012, Rufer et al probed the magnetic states of a single Ni nanotube in transport measurements using the anisotropic magnetoresistance effect. 23 Here we use a different method to measure the magnetization and effective magnetic anisotropy of individual Ni nanotubes, shedding further light on their magnetic states. Due to its high sensitivity, cantilever magnetometry is well-suited for the detection of the weak magnetic response of a variety of nanometer-scale systems.…”

Section: Abstract: Magnetic Nanotubes Cantilever Magnetometry Magnementioning

confidence: 99%

Cantilever Magnetometry of Individual Ni Nanotubes

et al. 2012

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Recent experimental and theoretical work has focused on ferromagnetic nanotubes due to their potential applications as magnetic sensors or as elements in high-density magnetic memory. The possible presence of magnetic vortex statesstates which produce no stray fields makes these structures particularly promising as storage devices. Here we investigate the behavior of the magnetization states in individual Ni nanotubes by sensitive cantilever magnetometry. Magnetometry measurements are carried out in the three major orientations, revealing the presence of different stable magnetic states. The observed behavior is well-described by a model based on the presence of uniform states at high applied magnetic fields and a circumferential onion state at low applied fields.

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Section: Abstract: Magnetic Nanotubes Cantilever Magnetometry Magnementioning

confidence: 99%

Cantilever Magnetometry of Individual Ni Nanotubes

et al. 2012

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“…38 The outer diameter D a = 190(±35) nm (Ref. 39), yielding a thickness t = 32.5(±17.5) nm of the Ni layer and hence a volume of the Ni tube V Ni = 0.096(±0.063) μm 3 .…”

Section: Ltmfm Setupmentioning

confidence: 99%

“…From previous experiments, we know that H max is strong enough to saturate the magnetization of the Ni nanotube. 38,47 To avoid trapped flux in the SQUID, the magnetization cycle is performed at T = 14 K, i.e., significantly above the transition temperature T c ∼ 9 K of the Nb SQUID. Subsequently, we zero-field cool the SQUID to its operation temperature T = 4.3 K, and then set up the FLL readout for the SQUID.…”

Section: Experimental Determination Of ( R)mentioning

confidence: 99%

Nanoscale multifunctional sensor formed by a Ni nanotube and a scanning Nb nanoSQUID

et al. 2013

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Nanoscale magnets might form the building blocks of next generation memories. To explore their functionality, magnetic sensing at the nanoscale is key. We present a multifunctional combination of a nanometer-sized superconducting quantum interference device (nanoSQUID) and a Ni nanotube attached to an ultrasoft cantilever as a magnetic tip. By scanning the Nb nanoSQUID with respect to the Ni tube, we map out and analyze their magnetic coupling, demonstrate the imaging of an Abrikosov vortex trapped in the SQUID structure -which is important in ruling out spurious magnetic signals -and reveal the high potential of the nanoSQUID as an ultrasensitive displacement detector. Our results open a new avenue for fundamental studies of nanoscale magnetism and superconductivity.

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“…[1][2][3][4][5][6][7][8] The cylindrical shape of the ferromagnet in such core/shell NWs causes a magnetization along the wire axis, i.e. perpendicular to the substrate surface.…”

Section: Introductionmentioning

confidence: 99%

Diffraction at GaAs/Fe3Si core/shell nanowires: The formation of nanofacets

et al. 2016

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GaAs/Fe 3 Si core/shell nanowire structures were fabricated by molecular-beam epitaxy on oxidized Si(111) substrates and investigated by synchrotron x-ray diffraction. The surfaces of the Fe 3 Si shells exhibit nanofacets. These facets consist of well pronounced Fe 3 Si{111} planes. Density functional theory reveals that the Si-terminated Fe 3 Si{111} surface has the lowest energy in agreement with the experimental findings. We can analyze the x-ray diffuse scattering and diffraction of the ensemble of nanowires avoiding the signal of the substrate and poly-crystalline films located between the wires. Fe 3 Si nanofacets cause streaks in the x-ray reciprocal space map rotated by an azimuthal angle of 30 • compared with those of bare GaAs nanowires. In the corresponding TEM micrograph the facets are revealed only if the incident electron beam is oriented along [110] in accordance with the x-ray results. Additional maxima in the x-ray scans indicate the onset of chemical reactions between Fe 3 Si shells and GaAs cores occurring at increased growth temperatures.

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Magnetic states of an individual Ni nanotube probed by anisotropic magnetoresistance

Cited by 77 publications

References 42 publications

Cantilever Magnetometry of Individual Ni Nanotubes

Cantilever Magnetometry of Individual Ni Nanotubes

Nanoscale multifunctional sensor formed by a Ni nanotube and a scanning Nb nanoSQUID

Diffraction at GaAs/Fe3Si core/shell nanowires: The formation of nanofacets

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