Colloquium - Fengyuan Yang (The Ohio State University) - Making Perfect (almost) Crystalline Materials for Spintronics - YIG Spin Pumping

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Fengyuan Yang
February 2, 2016
4:00PM - 5:00PM
Location
1080 Physics Research Building - Smith Seminar Room - Smith Seminar Room - reception at 3:45pm in the Atrium

Date Range
Add to Calendar 2016-02-02 16:00:00 2016-02-02 17:00:00 Colloquium - Fengyuan Yang (The Ohio State University) - Making Perfect (almost) Crystalline Materials for Spintronics - YIG Spin Pumping

Crystals were believed to hold magic power in ancient time, and in modern era, have revolutionized some of the most important technologies for society, for example, silicon-based information technology.  Spintronics is a leading candidate for next-generation technologies, which relies on the generation, transmission, manipulation, and detection of spin currents.  Ferromagnetic resonance (FMR) spin pumping is a powerful technique in generating and understanding pure spin currents.  Building on the excellent-quality Y3Fe5O12 (YIG) films grown by a unique sputtering technique and the exceptionally large inverse spin Hall effect (ISHE) signals enabled by these films, we have characterized pure spin transport in several classes of materials, including: nonmagnetic and ferromagnetic metals, nonmagnetic insulators, and antiferromagnetic insulators.  These results provide insights into the mechanisms of spin Hall physics and spin-orbit coupling, and reveal surprisingly robust spin conduction in antiferromagnetic insulators, which opens a wide range of new opportunities for spintronics.

1080 Physics Research Building - Smith Seminar Room - Smith Seminar Room - reception at 3:45pm in the Atrium Department of Physics physics@osu.edu America/New_York public
Description

Crystals were believed to hold magic power in ancient time, and in modern era, have revolutionized some of the most important technologies for society, for example, silicon-based information technology.  Spintronics is a leading candidate for next-generation technologies, which relies on the generation, transmission, manipulation, and detection of spin currents.  Ferromagnetic resonance (FMR) spin pumping is a powerful technique in generating and understanding pure spin currents.  Building on the excellent-quality Y3Fe5O12 (YIG) films grown by a unique sputtering technique and the exceptionally large inverse spin Hall effect (ISHE) signals enabled by these films, we have characterized pure spin transport in several classes of materials, including: nonmagnetic and ferromagnetic metals, nonmagnetic insulators, and antiferromagnetic insulators.  These results provide insights into the mechanisms of spin Hall physics and spin-orbit coupling, and reveal surprisingly robust spin conduction in antiferromagnetic insulators, which opens a wide range of new opportunities for spintronics.