Surface Spin-Valve Effect

Yanson, I. K.; Naǐdyuk, Yu. G.; Fisun, V. V.; Konovalenko, Alexander; Balkashin, O. P.; Triputen, L. Yu.; Korenivski, Vladislav

doi:10.1021/nl0628192

Cited by 21 publications

(31 citation statements)

References 15 publications

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“…Spin-valve effects that are similar to those found in the lithographically-made conducting F 1 /N/F 2 nanopillars were also observed in point contacts between a single ferromagnetic thin film and a nonmagnetic metallic tip [8][9][10]. According to Refs.…”

Section: Introductionmentioning

confidence: 90%

“…The magnetic properties of this interface layer F 2 differ from those of the bulk F-film due to a large density of nonmagnetic lattice defects and magnetic spin-lattice defects in the inter-diffusion region. Surprisingly, this layer consists of a single ferromagnetic domain, as indicated by the measured nearly-rectangular magnetoresistance hysteresis / ( ) dV dI H loops [10]. At the boundary between the interfacial F 2layer and the bulk F-film a spin-glass layer can be formed.…”

Section: Experimental Details and A Model Of A Point Contactmentioning

confidence: 97%

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Current-field diagram for the magnetic states of a surface spin valve in a point contact with a single ferromagnetic film

Yanson

Balkashin

Fisun

et al. 2013

Low Temperature Physics

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Articles you may be interested inSpin-valve effects in point contacts to exchange biased Co40Fe40B20 films Low Temp. Phys. 40, 915 (2014); 10.1063/1.4897413 Field and current-induced magnetization reversal studied through spatially resolved point-contactsThis is a study of the influence of an external magnetic field H and an electric current I on the spin-valve (SV) effect in a point contact between a ferromagnetic thin film (F) and a sharp, nonmagnetic metal tip (N). To explain our observations, we propose a model for a local surface SV in an N/F contact of this type. In this model, a ferromagnetic cluster at the N/F interface serves as the free layer in the SV. This cluster has a larger coercive field than the bulk of the ferromagnetic film, presumably due to its nanoscale nature. Finally, we construct a magnetic state diagram of the surface SV as a function of I and H. V C 2013 American Institute of Physics.

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Section: Introductionmentioning

confidence: 90%

Section: Experimental Details and A Model Of A Point Contactmentioning

confidence: 97%

Current-field diagram for the magnetic states of a surface spin valve in a point contact with a single ferromagnetic film

Yanson

Balkashin

Fisun

et al. 2013

Low Temperature Physics

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“…For more details on the spin-transfer-torque measurements see [29–30]. For more details on stimulated spin-photo-emission (spin lasing) see [15,24–26].…”

Section: Methodsmentioning

confidence: 99%

Sub-10 nm colloidal lithography for circuit-integrated spin-photo-electronic devices

Iovan

Fischer²,

Conte³

et al. 2012

Beilstein J. Nanotechnol.

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SummaryPatterning of materials at sub-10 nm dimensions is at the forefront of nanotechnology and employs techniques of various complexity, efficiency, areal scale, and cost. Colloid-based patterning is known to be capable of producing individual sub-10 nm objects. However, ordered, large-area nano-arrays, fully integrated into photonic or electronic devices have remained a challenging task. In this work, we extend the practice of colloidal lithography to producing large-area sub-10 nm point-contact arrays and demonstrate their circuit integration into spin-photo-electronic devices. The reported nanofabrication method should have broad application areas in nanotechnology as it allows ballistic-injection devices, even for metallic materials with relatively short characteristic relaxation lengths.

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“…9,10 Surface spin valves of this type have all the static and dynamic magnetic properties characteristic of traditional F 1 -N-F 2 structures. [9][10][11] It is well known 4 that, because of the giant magnetoresistance effect, 12 the electrical resistance of a spin valve depends on the mutual orientation angle of the magnetic moments of the ferromagnetic films that form this kind of structure (Figs. 1(a) and 1(c)).…”

Section: Mechanisms For the Response Of F-n Point Contacts Under Fmr mentioning

confidence: 99%

“…10 This type of behavior is typical of point contacts with a surface spin valve. [9][10][11] These kinds of contacts could also have hysteresis in the resistance as a function of a constant bias dV/dI(V), if the cluster size is sufficiently small that the spin torque of the transport current electron flux could significantly act on the magnetic moment of a cluster, thereby changing the direction of its magnetization vector.…”

Section: Low-frequency Resistance Measurementsmentioning

confidence: 99%

Ferromagnetic resonance in copper-permalloy point contacts

Balkashin

Fisun

Korovkin

et al. 2014

Low Temperature Physics

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The response of copper-permalloy (Ni 80 Fe 20 ) point microcontacts to microwave irradiation (8-12 GHz) is investigated systematically. The effects of the external magnetic field strength, transport current flowing through the contact, and microwave intensity and frequency on the measured signal are studied. The contributions to the contact electrical resistance owing to giant and anisotropic magnetoresistance are analyzed. The experimentally determined positions of the resonance features are in good agreement with Kittel's formula for FMR in films in parallel magnetic fields. The resonance signal is observed against the background of an additional contribution owing to rectification of the rf field on the nonlinear current-voltage characteristic of the contact. Two mechanisms for the resonance response are discovered: synchronous selfdetection from mixing of the rf current with temporal variations in the resistance and a bolometric response associated with the steady-state variation in the contact resistance when magnetization precession is excited. The amplitude of the resonance signal is linearly proportional to the transport current through the contact and to the intensity of the microwave irradiation. V C 2014 AIP Publishing LLC. [http://dx.

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Surface Spin-Valve Effect

Cited by 21 publications

References 15 publications

Current-field diagram for the magnetic states of a surface spin valve in a point contact with a single ferromagnetic film

Current-field diagram for the magnetic states of a surface spin valve in a point contact with a single ferromagnetic film

Sub-10 nm colloidal lithography for circuit-integrated spin-photo-electronic devices

Ferromagnetic resonance in copper-permalloy point contacts

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