Magnetization textures in NiPd nanostructures

Chauleau, Jean‐Yves; McMorran, Benjamin; Belkhou, Rachid; Bergeard, Nicolas; Menteş, Tevfik Onur; Niño, M. Á.; Locatelli, Andrea; Unguris, John; Rohart, Stanislas; Miltat, J.; Thiaville, A.

doi:10.1103/physrevb.84.094416

Cited by 12 publications

(11 citation statements)

References 26 publications

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“…By itself, this result is also expected: this type of flux-closure diamond multi-domain state can be seen in many other types of magnetic structures. 7,8,11,23,24 The interesting aspect of this system is that, unlike the cited previous studies, [7][8][9]11,12,24 we find that the transitions between these two states are reliably reversible under temperature cycling, and that the critical transition temperatures of individual nanostrips depend on their width. Indeed, we see that narrow nanostrips remain in a single-domain state up to their Curie temperature (T c ).…”

Section: Resultscontrasting

confidence: 51%

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Reversible temperature-driven domain transition in bistable Fe magnetic nanostrips grown on Ru(0001)

et al. 2015

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High aspect-ratio Fe nanostrips are studied with real-space micromagnetic imaging methods. We experimentally demonstrate reversible switching from essentially homogeneous single-domain states at room temperature to multi-domain diamond states at elevated temperature. This temperature-dependent magnetic bistability can be understood and modeled by accounting for the temperature dependence of the magnetocrystalline, shape, and magnetoelastic anisotropies. These results show how the transition temperature between two magnetic domain states can be tailored by controlling epitaxial strain and particle geometry, which may generate new opportunities for magnetic memory and logic device design.

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Section: Resultscontrasting

confidence: 51%

“…Taking into account that thermal strain is proportional to ΔT = T observation -T growth , where T observation is the T at which the XMCD-PEEM image is obtained and T growth = 880 K, the T at which the sample was grown, 24 the second source of magnetoelastic anisotropy vanishes upon annealing and approaching growth temperature.…”

Section: Resultsmentioning

confidence: 99%

Reversible temperature-driven domain transition in bistable Fe magnetic nanostrips grown on Ru(0001)

et al. 2015

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“…Based on these discussions, we expect that the total energy of CVDP is higher than that of APDP for smaller σ. Anti-parallel domains structure has previously been observed in long stripes with easy axis perpendicular to the long axis of stripes. [32][33][34] Instead of understanding the domain configuration at remanence from the point of view of global energy, people may expect that the system can reach local energy minima. 54 In other wards, dynamics may play a role in the formation of anti-parallel magnetic domain pattern.…”

Section: Resultsmentioning

confidence: 99%

“…[26][27][28][29][30][31] Periodic magnetic domain pattern on nano-stripes made by micro-lithography has indeed been studied. [32][33][34] However, it remains challenging to tune the competition between magneto-crystalline and shape anisotropy in a convenient and cost-effective way, 20,[35][36][37] which adds another layer of complexity to lithographical patterning of magnetic nanostructures.…”

Section: Introductionmentioning

confidence: 99%

Periodic magnetic domains in single-crystalline cobalt filament arrays

et al. 2016

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Magnetic structures with controlled domain wall pattern may be applied as potential building blocks for three-dimensional magnetic memory and logic devices. Using a unique electrochemical self-assembly method, we achieve regular single-crystalline cobalt filament arrays with specific geometric profile and crystallographic orientation, and the magnetic domain configuration can be conveniently tailored. We report for the first time the transition of periodic anti-parallel magnetic domains to a compressed vortex magnetic domains depending on the ratio of height vs. width of the wires. A "phase diagram" is obtained to describe the dependence of the type of magnetic domains and the geometrical profiles of the wires. Magnetoresistance of the filaments demonstrates that the contribution of series of 180 o domain walls is over 0.15% of the zero-field resistance ρ(H = 0). These self-assembled magnetic nanofilaments, with controlled periodic domain patterns, offer an interesting platform to explore domain-wall-based memory and logic devices.

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“…We use PdNi as a ferromagnetic alloy. It forms good contacts with CNT's (33,34) and its magnetization direction is simply controlled by the geometry of the electrodes (35). We set an angle (45° at zero magnetic field) between the magnetizations of the electrodes.…”

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confidence: 99%

Coherent coupling of a single spin to microwave cavity photons

Viennot

Dartiailh

Cottet

et al. 2015

Science

215

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Electron spins and photons are complementary quantum-mechanical objects that can be used to carry, manipulate and transform quantum information. To combine these resources, it is desirable to achieve the coherent coupling of a single spin to photons stored in a superconducting resonator. Using a circuit design based on a nanoscale spin-valve, we coherently hybridize the individual spin and charge states of a double quantum dot while preserving spin coherence. This scheme allows us to achieve spin-photon coupling up to the MHz range at the single spin level. The cooperativity is found to reach 2.3, and the spin coherence time is about 60ns. We thereby demonstrate a mesoscopic device suitable for nondestructive spin read-out and distant spin coupling.The methods of cavity quantum electrodynamics hold promise for an efficient use of the spin degree of freedom in the context of quantum computation and simulation (1). Realizing a coherent coupling between a single spin and cavity photons could enable quantum nondemolition readout of a single spin, quantum spin manipulation, and facilitate the coupling of distant spins (1,2,3,4). It could also be used in hybrid architectures in which single spins are coupled to superconducting quantum bits (5), or to simulate one-dimensional spin chains (6).The natural coupling of a spin to the magnetic part of the electromagnetic field is weak (7). In order to enhance it, one needs a large spin ensemble, typically of about 10 12 spins (8,9,10,11,12,13), but these ensembles lose the intrinsic non-linearity of a single spin 1/2.Alternatively, several theoretical proposals have been put forward to electrically couple single spins to superconducting resonators in a mesoscopic circuit (14,15,16,17), building on the exquisite accuracy with which superconducting circuits can be used to couple superconducting qubits and photons and manipulate them (18). One such approach is to engineer an artificial spin-photon interaction by using ferromagnetic reservoirs (15).Noteworthy, the spin/photon coupling is also raising experimental efforts in the optical domain (19,20,21,22,23), but the circuit approach presents the significant advantage of scalability.Recent experiments have demonstrated the coupling of double quantum dot charge states to coplanar waveguide resonators, with a coupling strength gcharge ≈ 2  10 -50 MHz (24,25,26,27,28). In Ref,(29), the spin blockade read-out technique in quantum dots (30) was combined with charge sensing with a microwave resonator (31). In contrast to this spinblockade scheme, here we use the ferromagnetic proximity effect in a coherent conductor to engineer a spin-photon coupling. Our scheme relies on the use of a non collinear spin valve geometry, which realizes an artificial spin orbit interaction (15). Specifically, we contact two non collinear ferromagnets on a carbon nanotube double quantum dot.Our device is shown in Fig. 1, A-C. Our resonator is similar to a previous experiment (27) with a coupling scheme adapted from (24). It is a Nb resonator with a qua...

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Magnetization textures in NiPd nanostructures

Cited by 12 publications

References 26 publications

Reversible temperature-driven domain transition in bistable Fe magnetic nanostrips grown on Ru(0001)

Reversible temperature-driven domain transition in bistable Fe magnetic nanostrips grown on Ru(0001)

Periodic magnetic domains in single-crystalline cobalt filament arrays

Coherent coupling of a single spin to microwave cavity photons

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