Gungun Lin

Topological magnetic states, such as chiral skyrmions, are of great scientific interest and show huge
potential for novel spintronics applications, provided their topological charges can be fully controlled. So far
skyrmionic textures have been observed in noncentrosymmetric crystalline materials with low symmetry
and at low temperatures. We propose theoretically and demonstrate experimentally the design of spin
textures with topological charge densities that can be tailored at ambient temperatures. Tuning the
interlayer coupling in vertically stacked nanopatterned magnetic heterostructures, such as a model system of
a Co/Pd multilayer coupled to Permalloy, the in-plane non-collinear spin texture of one layer can be
imprinted into the out-of-plane magnetised material. We observe distinct spin textures, e.g. vortices,
magnetic swirls with tunable opening angle, donut states and skyrmion core configurations. We show that
applying a small magnetic field, a reliable switching between topologically distinct textures can be achieved
at remanence.

A flexible light weight diagnostic platform is realized on cost-efficient large-area flexible foils enabling its cost-efficient high-volume delivery to medical institutions worldwide. The devices presented by L. Baraban, D. Makarov, and team on page 1517 allow the timely diagnosis of viral or infectious diseases, for example, the here demonstrated H1N1 subtype of the Avian Influenza Virus.

Topological magnetic states, such as chiral skyrmions, are of great scientific interest and show huge potential for novel spintronics applications, provided their topological charges can be fully controlled. So far skyrmionic textures have been observed in noncentrosymmetric crystalline materials with low symmetry and at low temperatures. We propose theoretically and demonstrate experimentally the design of spin textures with topological charge densities that can be tailored at ambient temperatures. Tuning the interlayer coupling in vertically stacked nanopatterned magnetic heterostructures, such as a model system of a Co/Pd multilayer coupled to Permalloy, the in-plane non-collinear spin texture of one layer can be imprinted into the out-of-plane magnetised material. We observe distinct spin textures, e.g. vortices, magnetic swirls with tunable opening angle, donut states and skyrmion core configurations. We show that applying a small magnetic field, a reliable switching between to...

The inside front cover highlights the breakthrough from rigid silicon-based magnetoelectronic devices to soft and compliant ones. On page 1333, M. Melzer, D. Makarov, and co-workers describe a method to transfer entire magnetoresistive microsensor structures from a rigid silicon substrate to a pre-stretched rubber membrane in a single step. This fabrication route overcomes several limitations of previous approaches to compliant magnetoelectronics and allows for invariance versus stretching up to 30%.

A grand vision of realization of smart and compact multifunctional microfluidic devices for wearable health monitoring, environment sensing and point-of-care tests emerged with the fast development of flexible electronics. As a vital component towards this vision, magnetic functionality in flexible fluidics is still missing although demanded by the broad utility of magnetic nanoparticles in medicine and biology. Here, we demonstrate the first flexible microfluidic analytic device with integrated high-performance giant magnetoresistive (GMR) sensors. This device can be bent to a radius of 2 mm while still retaining its full performance. Various dimensions of magnetic emulsion droplets can be probed with high precision using a limit of detection of 0.5 pl, providing broad applicability in high-throughput droplet screening, flow cytometry and drug development. The flexible feature of this analytic device holds great promise in the realization of wearable, implantable multifunctional platforms for biomedical, pharmaceutical and chemical applications.