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MUSTANG Informe resumido

Project ID: 307144
Financiado con arreglo a: FP7-IDEAS-ERC
País: Sweden

Mid-Term Report Summary - MUSTANG (Magnonics Using Spin Torque, spin caloritronics, And Nanoplasmonic engineerinG)

The MUSTANG project has as its overarching goal to develop a Magnonic technology platform where Magnonics is directly combined with Spintronics and Nanoplasmonics. As sub goals, it will demonstrate spin wave generation using spin transfer torque and the spin Hall effect, both in metal based systems and in insulator magnetic films, such as YIG. The project is now fully up and running with key people trained and productive to contribute to its goals. A number of breakthrough results have consequently been published in prestigious journals such as Nature Nanotechnology and Nature Communications.

The project has demonstrated how spin wave beams can be generated by nano-contact spin torque oscillators (NC-STOs) and how these beams are highly efficient in synchronizing a large set of such NC-STOs. There is in principle no longer any limit to how many NC-STOs can be synchronized provided they are aligned with the spin wave beams. This work was very recently published in Nature Nanotechnology and represents a true breakthrough in spin torque driven magnonics. We expect to build heavily on these results in the remainder of the project.
The project has also made numerical demonstrations of a new type of dynamical skyrmion with great advantages in terms of ease-of-use and output power in NC-STOs. This work was published in Nature Communications and have been invited to a number of conferences for presentations. We are now actively searching experimentally for this entirely novel nanomagnetic object in our devices.

The project has demonstrated spin Hall nano-oscillators (SHNOs) using extended layers of CoFeB/Pt for the first time. We can now make SHNOs with a range of materials and device geometries, which opens up for a number of new experiments and possibilities. We are now investigating mutual synchronization of many such SHNOs.

On the material side, the project has demonstrated ways to control the saturation magnetization, the damping, and the exchange stiffness of permalloy (NiFe) through alloying with Pt, Au, and/or Ag. It has also characterized the magnetodynamic properties of YIG films. Equipped with this material knowledge we can now design our devices using a greater range of material properties.

Given the above, it is fair to say that MUSTANG is on a good path towards a very successful completion with a high number of breakthrough results that will inspire us and others to continue these research in many directions.

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