Influence of Magnetic Sublattice Ordering on Skyrmion Bubble Stability in 2D Magnet FeGeTe.

The realization of above room-temperature ferromagnetism in the two-dimensional (2D) magnet FeGeTe represents a major advance for the use of van der Waals (vdW) materials in practical spintronic applications. In particular, observations of magnetic skyrmions and related states within exfoliated flakes of this material provide a pathway to the fine-tuning of topological spin textures via 2D material heterostructure engineering. However, there are conflicting reports as to the nature of the magnetic structures in FeGeTe.

Large exchange bias enhancement and control of ferromagnetic energy landscape by solid-state hydrogen gating.

Voltage control of exchange bias is desirable for spintronic device applications, however dynamic modulation of the unidirectional coupling energy in ferromagnet/antiferromagnet bilayers has not yet been achieved. Here we show that by solid-state hydrogen gating, perpendicular exchange bias can be enhanced by > 100% in a reversible and analog manner, in a simple Co/CoNiO heterostructure at room temperature. We show that this phenomenon is an isothermal analog to conventional field-cooling and that sizable changes in average coupling energy can result from small changes in AFM grain rotatability.

Voltage control of magnetic order in RKKY coupled multilayers.

In the field of antiferromagnetic (AFM) spintronics, there is a substantial effort present to make AFMs viable active components for efficient and fast devices. Typically, this is done by manipulating the AFM Néel vector. Here, we establish a method of enabling AFM active components by directly controlling the magnetic order.

Anisotropic and Multicomponent Nanostructures by Controlled Symmetry Breaking of Metal Halide Intermediates.

We propose and validate herein a solution-phase synthetic strategy relying on in situ photostimulation and reduction of metal-halide intermediates to yield complex anisotropic and multicomponent nanostructures. Exposure of AgBr nanoparticles to ultraviolet light and l-Arginine forms dimers composed of crystalline Ag and AgBr nanophases. The Ag nanoparticle nucleates at and grows from a single point on the surface of the AgBr phase and the interface connecting these phases is atomically sharp.