Quasiparticle Relaxation Across a Spin Gap in the Itinerant Antiferromagnet UNiGa5

Elbert E. M. Chia, H. J. Lee, Namjung Hur +5

Ultrafast time-resolved photoinduced reflectivity is measured for the itinerant antiferromagnet UNiGa${}_5$ ($T_N\approx$85 K) from room temperature to 10 K. The relaxation time…