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Expanding the scope of materials for spin caloritronics enhances the opportunity to achieve more energy efficient memory and sensor devices. Here the authors report the tunnel magneto-Seebeck effects in magnetic tunnel junctions with Co₂FeAl and Co₂FeSi Heusler compounds.

It is now shown that femtosecond optical excitation can be used as a tool to investigate the spin-polarization properties of half-metals, and provide a clear distinction between those and metals. Such knowledge is of fundamental importance for the use of these materials in spintronics applications.

The combined magnetic and thermoelectric properties of nanostructures have recently attracted considerable attention. It is now demonstrated that the Seebeck coefficient in a magnetic tunnelling junction is strongly dependent on the magnetic configuration.

Conflicting observations of the speed at which various ferromagnetic materials respond to an external femtosecond laser excitation have generated considerable controversy. It is now shown that ferromagnets can be divided in two categories, according to the values of specific magnetic parameters.

When molecules of a phenalenyl derivative, which has no net spin, are deposited on a ferromagnet, they develop into a magnetic supramolecular layer with spin-filtering properties; this could be the basis for a new approach to building molecular magnetic devices.

The exact mechanisms involved in ultrafast demagnetization have long been debated. A new study published in Nature uncovers the role played in this process by the angular momentum transfer to the lattice, which is faster than previously thought.

Spin waves can carry information that could be used for data processing, but producing and controlling them can be challenging. Now it is possible to generate short-wavelength coherent spin waves that can travel at high speed over a long distance.

Measurement of the bound-state β⁻ decay of ²⁰⁵Tl⁸¹⁺ gives a new, longer half-life, allowing for the calculation of accurate stellar ²⁰⁵Pb yields and the isolation time of the early Solar System.

Surface currents in topological insulators can be controlled by light, but the underlying mechanisms are not well understood. Here, Braun et al. report an ultrafast shift photocurrent at the surface of Ca-doped Bi₂Se₃, whereas injection currents are much smaller than expected from asymmetric depopulation of the Dirac cone.

Probing spin pumping in the terahertz regime allows one to reveal its initial elementary steps. Here, the authors show that the formation of the spin Seebeck current in YIG/Pt critically relies on hot thermalized metal electrons because they impinge on the metal-insulator interface with maximum noise.

Hybrid optical-electrical excitation drives magnetic tunnel junctions into a regime with giant thermovoltage output exhibiting a cubic dependence on current. This nonlinear response enables accurate neuromorphic computing, achieving 93.7% digit recognition and offering a pathway toward spintronic AI systems.

The magnetic properties of a ferromagnetic layer stack are controlled on attosecond timescales through optically induced spin and orbital momentum transfer, demonstrating a coherent regime of ultrafast magnetism.

Understanding nanoscale temperature gradients in magnetic materials and how it affects their properties can help widen their potential applications. The authors analyze the anomalous Nernst effect in magnetic tunnel junctions and report how temperature gradients influence the thermomagnetic properties in three dimensions.