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Ultrafast Spin Dynamics of Electrochemically Grown Heusler Alloy Films

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journal contribution
posted on 07.05.2021, 12:37 by Md Rejaul Karim, Arundhati Adhikari, Surya Narayan Panda, Purbasha Sharangi, Soubhik Kayal, Gouranga Manna, P. S. Anil Kumar, Subhankar Bedanta, Anjan Barman, Indranil Sarkar
The electrochemical growth of Heusler alloy film with good morphological quality and crystalline order using single-crystalline substrate is demonstrated. Static magneto optical Kerr effect studies are employed to reveal the surface magnetization reversal of the films. An understanding of the intrinsic nature of the magnetization dynamics in this class of electrochemically grown materials is presented using time-resolved magneto optical Kerr effect measurements, under femtosecond laser excitation. Excitation laser fluence dependence study reveals the ultrafast demagnetization time, fast remagnetization time, and magnetic damping parameter as well as their correlation.