Applications of nanomagnets as dynamical systems: II

Abstract

In Part I of this topical review, we discussed dynamical phenomena in nanomagnets, focusing primarily on magnetization reversal with an eye to digital applications. In this part, we address mostly wave-like phenomena in nanomagnets, with emphasis on spin waves in myriad nanomagnetic systems and methods of controlling magnetization dynamics in nanomagnet arrays which may have analog applications. We conclude with a discussion of some interesting spintronic phenomena that undergird the rich physics exhibited by nanomagnet assemblies.

Static and dynamic magnetic properties of circular and square cobalt nanodots in hexagonal cells

“…In addition, cobalt is a magnetically hard material that can exhibit strong anisotropy, 19,20 so it can be considered as an ideal material for high-density non-volatile magnetic memories, since they offer the possibility of increasing storage density by reducing the size of magnetic bits without thermal fluctuations, thus offering more efficient magnetic memories. 19,21 On the other hand, the study of the dynamic properties of magnetic nanostructures has received increasing attention, offering emerging applications in spintronics-based devices such as magnetic random-access memories (MRAMs) for microwave signal processing, [22][23][24] spin-torque nano-oscillator (STNO) 23,25,26 and spin-current nano-oscillators (SCNO). 27,28 In this sense, a recent report on the study of SCNO devices by means of micromagnetic simulations shows the feasibility in the development of sensitive frequency-based nano-biosensors for detecting single magnetic nanostructures.…”

“…On the other hand, the study of the dynamic properties of magnetic nanostructures has received increasing attention, offering emerging applications in spintronics-based devices such as magnetic random-access memories (MRAMs) for microwave signal processing, 22–24 spin-torque nano-oscillator (STNO) 23,25,26 and spin-current nano-oscillators (SCNO). 27,28 In this sense, a recent report on the study of SCNO devices by means of micromagnetic simulations shows the feasibility in the development of sensitive frequency-based nano-biosensors for detecting single magnetic nanostructures.…”

Tuning Magnetic Properties of CoxNi100–x Nanodots: Micromagnetic Insights for Tailoring Enhanced Electrochemical Performance in Energy Storage Devices

“…In this regard, significant advances in the study of single nanomagnet dynamics were reported when Rana et al investigated the time-resolved precessional magnetization dynamics of an isolated 50 nm-wide square permalloy dot, revealing a dominant mode known as the edge mode (EM), in addition to the center mode (CM). It has been widely observed that the EM mode generally outweighs the CM, primarily because the EM is highly sensitive to imperfections, as well as variations in dot shape and size. − Thus, conducting simulations allows us to examine the quasi-static and dynamic aspects of magnetization, facilitating a comprehensive understanding of magnetic phenomena that are crucial for electrochemical applications.…”

Bias field orientation driven reconfigurable magnonics and magnon−magnon coupling in triangular shaped Ni80Fe20 nanodot arrays

“…Hybrid systems [1][2][3][4][5][6] allow us to accelerate fundamental developments in nanotechnology using different carriers such as superconducting qubits, phonons, photons and magnons. The field of magnonics [7,8] uses the carrier magnon (quanta of spin waves) to transfer quantum information coherently from one quantum state to another quantum state in an artificially patterned periodic nanostructure, popularly known as magnonic crystals (MCs) [9,10].…”