Detection of Short-Waved Spin Waves in Individual Microscopic Spin-Wave Waveguides Using the Inverse Spin Hall Effect

Area of Science:

• Materials Science
• Condensed Matter Physics
• Nanotechnology

Background:

• Miniaturization of complementary metal-oxide-semiconductor (CMOS) devices faces challenges like leakage currents.
• Spin waves offer a promising alternative for high data density and low power consumption in nanoscale computing.
• Scalable and CMOS-compatible detection schemes are crucial for practical spin-wave applications.

Purpose of the Study:

• To demonstrate a wave-vector independent detection method for short-wavelength spin waves.
• To investigate the use of ultrathin Ta/Co8Fe72B20/MgO films for spin-wave detection.
• To enable scalable interconnects between spin waves and CMOS technology.

Main Methods:

• Utilized the inverse spin Hall effect for spin-wave detection.
• Fabricated spin-wave waveguides from ultrathin Ta/Co8Fe72B20/MgO films.
• Investigated spin waves with wavelengths down to 150 nm.

Main Results:

• Achieved wave-vector independent detection of spin waves.
• Successfully detected spin waves with wavelengths as short as 150 nm.
• Demonstrated the efficacy of ultrathin Ta/Co8Fe72B20/MgO in spin-wave waveguides.

Conclusions:

• The developed detection scheme is scalable and compatible with CMOS technology.
• Ultrathin films of standard spintronic materials can be effectively used in magnonics.
• This work paves the way for miniaturized interconnects for nanoscale wave computing.