Mi‐Young Im
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View article: Terrace‐Edge‐Induced Domain Nucleation in Room‐Temperature 2D Magnetic Van Der Waals Heterostructures
Terrace‐Edge‐Induced Domain Nucleation in Room‐Temperature 2D Magnetic Van Der Waals Heterostructures Open
Terrace‐edges, which are step‐like height discontinuities formed during layer stacking or exfoliation, can locally modify magnetic characteristics. Magnetic domain behavior and its structural dependence in a 2D van der Waals (vdW) heterost…
View article: Sensitive dependence on initial conditions in a formation of magnetic vortices
Sensitive dependence on initial conditions in a formation of magnetic vortices Open
The magnetic vortex exhibits promise as a true random number generator for hardware-based encryption and probabilistic computing due to its stochastic formation of energetically equivalent fourfold degenerate states, characterized by two t…
View article: Skyrmion Emergence via Domain Wall Anchoring through Vertical Bloch Line
Skyrmion Emergence via Domain Wall Anchoring through Vertical Bloch Line Open
Skyrmions, topologically stable magnetic solitons characterized by whirling magnetization in nanoscale magnetic elements, show promise information carriers in spintronics and spin-based quantum computing due to their unique properties: sma…
View article: Control of a twisted domain wall motion supported by topology
Control of a twisted domain wall motion supported by topology Open
We report the topology-mediated modulation of a twisted domain wall speed in a thick perpendicularly magnetized system. By exploiting the topological robustness of the direction of the Bloch wall component in the twisted domain wall, we sh…
View article: Tailored Micromagnet Sorting Gate for Simultaneous Multiple Cell Screening in Portable Magnetophoretic Cell‐On‐Chip Platforms
Tailored Micromagnet Sorting Gate for Simultaneous Multiple Cell Screening in Portable Magnetophoretic Cell‐On‐Chip Platforms Open
Conventional magnetophoresis techniques for manipulating biocarriers and cells predominantly rely on large‐scale electromagnetic systems, which is a major obstacle to the development of portable and miniaturized cell‐on‐chip platforms. Her…
View article: Magnetically Selective Versatile Transport of Microrobotic Carriers
Magnetically Selective Versatile Transport of Microrobotic Carriers Open
Field‐driven transport systems offer great promise for use as biofunctionalized carriers in microrobotics, biomedicine, and cell delivery applications. Despite the construction of artificial microtubules using several micromagnets, which p…
View article: Direct Observation of Room‐Temperature Magnetic Skyrmion Motion Driven by Ultra‐Low Current Density in Van Der Waals Ferromagnets
Direct Observation of Room‐Temperature Magnetic Skyrmion Motion Driven by Ultra‐Low Current Density in Van Der Waals Ferromagnets Open
The recent discovery of room‐temperature ferromagnetism in 2D van der Waals (vdW) materials, such as Fe 3 GaTe 2 (FGaT), has garnered significant interest in offering a robust platform for 2D spintronic applications. Various fundamental op…
View article: Atomic scale interface engineering for realizing a perpendicularly magnetized CoFeB-based skyrmion hosting material
Atomic scale interface engineering for realizing a perpendicularly magnetized CoFeB-based skyrmion hosting material Open
Néel-type magnetic skyrmions in perpendicularly magnetized systems have attracted considerable interest due to their potential in fundamental research on topological objects and spintronics applications. Various systems have been explored …
View article: Systematic Control of Ferrimagnetic Skyrmions via Composition Modulation in Pt/Fe<sub>1–<i>x</i></sub>Tb<sub><i>x</i></sub>/Ta Multilayers
Systematic Control of Ferrimagnetic Skyrmions via Composition Modulation in Pt/Fe<sub>1–<i>x</i></sub>Tb<sub><i>x</i></sub>/Ta Multilayers Open
Magnetic skyrmions are topological spin textures that can be used as memory and logic components for advancing the next generation spintronics. In this regard, control of nanoscale skyrmions, including their sizes and densities, is of part…
View article: Element-specific first order reversal curves measured by magnetic transmission x-ray microscopy
Element-specific first order reversal curves measured by magnetic transmission x-ray microscopy Open
The first-order reversal curve (FORC) method is a macroscopic measurement technique that can be used to extract quantitative and microscopic properties of hysteretic systems. Using magnetic transmission x-ray microscopy (MTXM), local eleme…
View article: Element-Specific First Order Reversal Curves Measured by Magnetic Transmission X-ray Microscopy
Element-Specific First Order Reversal Curves Measured by Magnetic Transmission X-ray Microscopy Open
The first order reversal curve (FORC) method is a macroscopic measurement technique which can be used to extract quantitative, microscopic properties of hysteretic systems. Using magnetic transmission X-ray microscopy (MTXM), local element…
View article: Unveiling the Emergent Traits of Chiral Spin Textures in Magnetic Multilayers
Unveiling the Emergent Traits of Chiral Spin Textures in Magnetic Multilayers Open
Magnetic skyrmions are topologically wound nanoscale textures of spins whose ambient stability and electrical manipulation in multilayer films have led to an explosion of research activities. While past efforts focused predominantly on iso…
View article: The 20-nm Skyrmion Generated at Room Temperature by Spin-Orbit Torques
The 20-nm Skyrmion Generated at Room Temperature by Spin-Orbit Torques Open
The discovery of magnetic skyrmions provides a promising pathway for developing functional spintronic memory and logic devices. Towards the future high-density memory application, nanoscale skyrmions with miniaturized diameters, ideally do…
View article: Stochasticity in the Switching of Nanodisks for Probabilistic Computing
Stochasticity in the Switching of Nanodisks for Probabilistic Computing Open
Stochasticity in magnetic nanodevices is an essential characteristic for harnessing these devices to computing based on population coding or the building blocks of probabilistic computing, p-bits. A magnetic tunneling junction (MTJ) consis…
View article: Magnetic skyrmion diode: Unidirectional skyrmion motion via symmetry breaking of potential energy barriers
Magnetic skyrmion diode: Unidirectional skyrmion motion via symmetry breaking of potential energy barriers Open
We realize a magnetic skyrmion diode operated by a unidirectional skyrmion transport that flows in only one direction, which is highly significant for information processing in spintronic and nanoelectronic devices. We easily control the s…
View article: Rare‐Earth Permanent Magnet SmCo<sub>5</sub> for Chiral Interfacial Spin‐Orbitronics
Rare‐Earth Permanent Magnet SmCo<sub>5</sub> for Chiral Interfacial Spin‐Orbitronics Open
Interfacially asymmetric magnetic multilayers made of heavy metal/ferromagnet have attracted considerable attention in the spintronics community for accommodating spin‐orbit torques (SOTs) and meanwhile for hosting chiral spin textures. In…
View article: Topology-dependent stability of vortex-antivortex structures
Topology-dependent stability of vortex-antivortex structures Open
The non-trivial topology of magnetic structures such as vortices and skyrmions is considered as a key concept to explain the stability of those structures. The stability, dictated by non-trivial topology, provides great potential for devic…
View article: Targeted Writing and Deleting of Magnetic Skyrmions in Two-Terminal Nanowire Devices
Targeted Writing and Deleting of Magnetic Skyrmions in Two-Terminal Nanowire Devices Open
Controllable writing and deleting of nanoscale magnetic skyrmions are key requirements for their use as information carriers for next-generation memory and computing technologies. While several schemes have been proposed, they require comp…
View article: Energy-efficient generation of skyrmion phases in Co/Ni/Pt-based multilayers using Joule heating
Energy-efficient generation of skyrmion phases in Co/Ni/Pt-based multilayers using Joule heating Open
We have studied the effects of electrical current pulses on skyrmion\nformation in a series of Co/Ni/Pt-based multilayers. Transmission X-ray\nmicroscopy reveals that by applying electrical current pulses of duration and\ncurrent density o…
View article: Energy-efficient current-induced skyrmion phases in Co/Ni/Pt-based multilayers
Energy-efficient current-induced skyrmion phases in Co/Ni/Pt-based multilayers Open
We have studied the effects of electrical current pulses on skyrmion nucleation in a series of Pt/Co/Ni-based multilayers. Transmission X-ray microscopy reveals that by applying electrical current pulses of duration and current density on …
View article: Generation and stability of structurally imprinted target skyrmions in magnetic multilayers
Generation and stability of structurally imprinted target skyrmions in magnetic multilayers Open
Target Skyrmions (TSks) are extended topological spin textures with a constant chirality where the rotation of the z component of the magnetization is larger than π. TSks have topological charge 1 or 0, if the z component of the magnetizat…
View article: Field Response of Magnetic Vortices in Dusty Olivine From the Semarkona Chondrite
Field Response of Magnetic Vortices in Dusty Olivine From the Semarkona Chondrite Open
Recent paleomagnetic studies have constrained the strength and longevity of the magnetic field generated by the solar nebula, which has broad implications for the early evolution of the solar system. Paleomagnetic evidence was recorded by …