Perpendicularly magnetized Co/Pd-based magneto-resistive heterostructures on flexible substrates.

Area of Science:

• Materials Science
• Condensed Matter Physics
• Nanotechnology

Background:

• Flexible electronics require advanced materials beyond conventional rigid substrates.
• Flexible magneto-resistive heterostructures with longitudinal magnetic anisotropy are established.
• Flexible magneto-resistive heterostructures with perpendicular magnetic anisotropy (PMA) remain unexplored.

Purpose of the Study:

• To develop flexible giant magneto-resistive (GMR) spin-valve stacks with PMA.
• To investigate the performance and robustness of these flexible PMA GMR devices.
• To enable novel applications in flexible electronics and advanced materials.

Main Methods:

• Fabrication of Co/Pd-based GMR spin-valve stacks with PMA.
• Utilized an innovative transfer-and-bonding strategy from SiO2/Si(100) substrates.
• Exploited low adhesion of a gold underlayer for material transfer.

Main Results:

• Achieved flexible PMA spin-valves with a significant GMR ratio of ~1.5%.
• Demonstrated high robustness against bending, with minimal change in magneto-resistive properties.
• Successfully transferred complex heterostructures without compromising PMA.

Conclusions:

• The developed flexible PMA GMR spin-valves are suitable for integration onto curved surfaces.
• This work opens avenues for novel flexible magneto-resistive devices and high-temperature material growth.
• The findings contribute to the advancement of flexible electronics and nanoscale material engineering.