Abstract
The first clear evidence for the existence of magnetic polaritons from a high resolution, far-infrared (FIR) study of the antiferromagnetic resonance (AFMR) of FeF 2 is presented. The broad (4 kOe) asymmetric structure observed in transmission is shown to be a characteristic polariton effect; the linewidth ΔH at 4.2 K is only 350 Oe. The Mn impurity mode is enhanced by ∼50 in agreement with a coupled equations of motion prediction. Both host and impurity resonances are broadened by superradiance.
Full Text 
Sign-in/Register to access full text options
Sign-in/Register to access full text options 
Published version (
Free)
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
