Imprinting antivortex states from ferromagnetic Fe into antiferromagnetic NiO in epitaxial NiO/Fe/Ag(001) microstructures

Li, J.; Tan, Ai-Girl; Moon, Kyoung‐Woong; Doran, Andrew; Marcus, Matthew A.; Young, A. T.; Arenholz, Elke; Ma, Siying; Yang, Renfu; Hwang, Chanyoung; Qiu, Z. Q.

doi:10.1063/1.4869098

Cited by 5 publications

(2 citation statements)

References 21 publications

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“…53 The magnetic properties of composite nanoparticles among noble metals and magnetic metals have been widely investigated during the past few decades. [194][195][196][197][198][199][200] Investigations on the magnetic properties of Fe-Ag composite nanoparticles with different ratios of Fe and Ag, including Fe 90 Ag 10 , 197,201 Fe 75 Ag 25 , 197,202 Fe 55 Ag 45 , 203 Fe 50 Ag 50 , 197 Fe 35 Ag 65 , 204 and Fe 25 Ag 75 , 197,204 suggest that the magnetic properties of composite nanoparticles are strongly dependent on the interactions between the different elements as well as structural arrangement (Fig. 9).…”

Section: Magnetic Propertiesmentioning

confidence: 99%

Recent advances in noble metal based composite nanocatalysts: colloidal synthesis, properties, and catalytic applications

et al. 2015

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This Review article provides a report on progress in the synthesis, properties and catalytic applications of noble metal based composite nanomaterials. We begin with a brief discussion on the categories of various composite materials. We then present some important colloidal synthetic approaches to the composite nanostructures; here, major attention has been paid to bimetallic nanoparticles. We also introduce some important physiochemical properties that are beneficial from composite nanomaterials. Finally, we highlight the catalytic applications of such composite nanoparticles and conclude with remarks on prospective future directions.

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Section: Magnetic Propertiesmentioning

confidence: 99%

Recent advances in noble metal based composite nanocatalysts: colloidal synthesis, properties, and catalytic applications

et al. 2015

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“…So far, the single antivortex has been realized in X-shaped, 20) ¨-shaped, 18,19) clover-shaped, 6) pound-key shaped, 21) and ¤-shaped 22) ferromagnetic wires and ferromagnet-antiferromagnet bilayers. 23) To investigate the electric transport properties of the antivortex, the X-shaped cross wire is suitable because there is no short circuit among the wires.…”

Section: Introductionmentioning

confidence: 99%

Criteria for electric determination of antivortex creation in ferromagnetic thin film

Goto

Nozaki

Sekiguchi

2015

Jpn. J. Appl. Phys.

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Antivortex creation in a cross-shaped wire was demonstrated by using magnetoresistance and magnetic force microscopy measurements. The magnetization process was stochastic and exhibited a wide variety of magnetoresistance curves. By developing a conventional method, we have achieved electrical determination criteria to distinguish antivortex creation from many other magnetization states. The electrical criteria provide a simple method without large-scale apparatus and promote further experiments such as spin-current driven antivortex dynamics.

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Non‐Volatile Analog Control and Reconfiguration of a Vortex Nano‐Oscillator Frequency

Stebliy,

Jenkins,

Benetti

et al. 2024

Adv Funct Materials

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Magnetic tunnel junctions are nanoscale devices that have recently attracted interest in the context of frequency multiplexed spintronic neural networks, due to their interesting dynamical properties, which are defined during the fabrication process, and depend on the material parameters and geometry. This work proposes an approach to extending the functionality of a standard magnetic tunnel junction (MTJ) by introducing an additional ferromagnet/antiferromagnet (FM/AFM) storage layer (SL) vertically integrated with the standard vortex MTJ stack into the nanopillar. The magnetostatic field created by this storage layer acts on the free layer and can be used to change its static and dynamic properties. To tune the magnitude and direction of this magnetostatic field, magnetic reconfiguration is carried out through a thermally assisted switching mechanism using a voltage pulse that heats the AFM layer in the SL above the Néel temperature in the presence of an external field. It is experimentally shown that using an MTJ based on a 600 nm diameter nanopillar with a vortex in the free layer, reconfiguration of the SL allows to continuously change the core precession frequency in the 15 MHz range, or ≈10% of the device frequency.

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Imprinting antivortex states from ferromagnetic Fe into antiferromagnetic NiO in epitaxial NiO/Fe/Ag(001) microstructures

Cited by 5 publications

References 21 publications

Recent advances in noble metal based composite nanocatalysts: colloidal synthesis, properties, and catalytic applications

Recent advances in noble metal based composite nanocatalysts: colloidal synthesis, properties, and catalytic applications

Criteria for electric determination of antivortex creation in ferromagnetic thin film

Non‐Volatile Analog Control and Reconfiguration of a Vortex Nano‐Oscillator Frequency

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