Ultrafast optical probe of coherent acoustic phonons in <inline-formula> <img src="cpb_26_1_016802ieqn1.gif"/> </inline-formula> Heusler film

Ultrafast optical probe of coherent acoustic phonons in

Heusler film

Yan Wei, Wang Hai-Long, Zhao Jian-Hua, Zhang Xin-Hui^†

(color online) Typical time-resolved reflectivity responses and their best fits (red solid line) for Co₂MnAl films with different thickness: (a) 60 nm; (b) 100 nm. The insets in panels (a) and (b) show the fast Fourier transform (FFT) of the oscillation, respectively.