Probing Nonlinear Spin Dynamics in Canted Easy-Plane Antiferromagnets Using Spin-Rectification Effects

Area of Science:

• Spintronics
• Condensed Matter Physics
• Materials Science

Background:

• Spin-rectification phenomena are crucial for spintronic devices.
• Canted antiferromagnets and altermagnetic materials offer unique magnetic properties.
• Understanding Dzyaloshinskii-Moriya interaction is key to controlling spin dynamics.

Purpose of the Study:

• To investigate spin-rectification phenomena in canted antiferromagnets.
• To explore the role of Dzyaloshinskii-Moriya interaction in enhancing excitation efficiency.
• To analyze the influence of symmetry and detection mechanisms on rectified voltage.

Main Methods:

• Experimental investigation of spin-rectification effects.
• Utilizing spin-Hall magnetoresistance and bolometric effects for detection.
• Analysis of antiferromagnetic dynamics under varying conditions.

Main Results:

• Excitation efficiency is significantly enhanced by the Dzyaloshinskii-Moriya interaction.
• Antiferromagnetic dynamics detected with efficiency up to mV/W.
• Rectified voltage depends on torque symmetry, detection methods, and crystalline axis.
• Observed saturation effects and nonlinear redshift in antiferromagnetic resonance at high power.

Conclusions:

• Dzyaloshinskii-Moriya interaction is a key factor for efficient spin rectification in canted antiferromagnets.
• Spin-Hall magnetoresistance and bolometric effects are viable detection methods for antiferromagnetic dynamics.
• Nonlinear effects like spin-wave instabilities and resonance redshift occur at high pumping powers.
• Findings pave the way for advanced nonlinear dynamics studies in antiferromagnetic and altermagnetic spintronics.