Voltage-controlled bimeron diode-like effect in nanoscale information channel

Abstract

Magnetic bimeron, as the in-plane counterpart of the magnetic skyrmion, has potential applications in next-generation spin memory devices due to its lower energy consumption. In this work, the dynamic behavior of a current-driven bimeron in a nanotrack with voltage-controlled magnetic anisotropy (VCMA) is investigated. By adjusting the profile of VCMA, the bimeron can display a diode like unidirectional behavior in the nanotrack. The unidirectional behavior can be modulated by changing the driven current density and width of the VCMA region. The trajectory of bimeron can also be controlled by periodic VCMA region, which can enhance the stability of bimeron and realize high storage density bimeron based information channel.

Topological transformation of synthetic ferromagnetic skyrmions: thermal assisted switching of helicity by spin-orbit torque

“…Topological magnetic structures, such as magnetic skyrmions [1][2][3][4][5][6] , skyrmionium [7][8][9][10] , meron [11][12] , bobber [13][14] , soliton [15][16] , biskyrmion 17 , bimeron [18][19][20] and their derivative structures [21][22][23] , have gained signi cant research attention due to their unique physical properties and potential applications in spintronics 24 . The non-collinear spin textures arise from the interplay between various energy terms.…”

Shape-influenced non-reciprocal transport of magnetic skyrmions in nanoscale channel

“…Currently, there are only limited studies of controlling the unidirectional motion of skyrmions in confined systems, such as using voltage controlled magnetic anisotropy to realize unidirectional motion of skyrmions. [26][27][28] Therefore, the thermal effects in the device can weaken the performance of voltage-controlled skyrmion non-reciprocal transport devices, such as reducing the effective magnetic anisotropy and leading to the failure of voltage control, as well as causing skyrmion Brownian motion and reducing the stability of skyrmions in nanowires. [28][29][30][31] Skyrmions still hold great potential ability to achieve complex logic functionalities and combine storage-computation capabilities.…”

“…[28][29][30][31] Skyrmions still hold great potential ability to achieve complex logic functionalities and combine storage-computation capabilities. [23][24][25][26][27][28] In this work, we focus on investigating the non-reciprocal transport behavior of skyrmions and their interactions with boundaries of different notch structures. Through micromagnetic simulation, we explore the non-reciprocal transport properties of skyrmions with different notch structures.…”

A magnetic skyrmion diode based on potential well inducting effect

“…Since the first experimental observation of magnetic skyrmions in 2009 [5,6], the applications of skyrmions in spintronic devices have been extensively studied [7][8][9] due to their high stability, low energy consumption, and small size. A number of spintronic devices based on skyrmions have been designed, such as diodes [10][11][12][13][14], logic * Authors to whom any correspondence should be addressed.…”

“…L Zhao conducted numerical simulation of a skyrmion diode for the first time [10]. Subsequently, there have been several reports on the research based on skyrmion diodes [11][12][13][14]. In addition, there is a study based on a skyrmionium diode [24].…”