Role of critical spin fluctuations in ultrafast demagnetization of transition-metal rare-earth alloys

V. Lopez-Flores, N. Bergeard, V. Halte +6

Ultrafast magnetization dynamics induced by femtosecond laser pulses have been measured in ferrimagnetic Co0.8Gd0.2, Co.74Tb.26 and Co.86Tb.14 alloys. Using element sensitivity of…