Ultrafast Dynamics in Hexagonal HoMnO3 Studied by Femtosecond Spectroscopy

• Main Authors: Wu, Hsiang Ying, 吳享穎
• Other Authors: Luo, Chih Wei
• Format: Others
• Language: zh-TW
• Published: 2009
• Online Access: http://ndltd.ncl.edu.tw/handle/44110204904752570713

碩士 === 國立交通大學 === 電子物理系所 === 97 === We studied the ultrafast dynamics in hexagonal HoMnO3 by pump-probe system and time-resolved MOKE system with different polarization pump beam (linear, left circular, right circular polarization), various temperatures, and magnetic field. The disorder, disorder time, and reorder time of magnetic moment in hexagonal HoMnO3 have been observed via the d-d excitation of electrons. Moreover, by measuring the Kerr signal in time-resolved MOKE system, the relation between photon induced birefringence and magnetic structure has been systematically studied in different temperatures, external magnetic field, and different polarization pump beam.