Author/Authors :
Luo، نويسنده , , J. and Zheng، نويسنده , , H.Z. and Shen، نويسنده , , C. and Zhang، نويسنده , , H. and Zhu، نويسنده , , K. and Zhu، نويسنده , , H. and Liu، نويسنده , , J. and Li، نويسنده , , G.R. and Ji، نويسنده , , Y. and Zhao، نويسنده , , J.H.، نويسنده ,
Abstract :
By chopping a pump beam in conventional time-resolved Kerr rotation (TRKR) experiments and measuring the time evolution of M-shaped “major” hysteresis loops of magnetic linear dichroism ( Δ MLD = MLD p u m p - o n − MLD p u m p - o f f ), the differential MLD signal in the presence and the absence of the pump beam, we studied the dynamics of photo-enhanced magneto-crystalline anisotropy, and found that its very long recovering time (much longer than 13 ns) might reflect the nature of the coherent coupling between photo-excited holes and localized spins in the d shell of manganese.
Keywords :
E. Magnetic linear dichroism , A. Semiconductors , A. Magnetic films , E. Time-resolved Kerr rotation
