%0 Journal Article %T RE-TM antiferromagnetic coupling and laser induced ultrafast magnetization reversal dynamics in GdFeCo magneto-optical films
GdFeCo磁光薄膜中RE-TM反铁磁耦合与激光感应超快磁化翻转动力学研究 %A Gao Rui-Xin %A Xu Zhen %A Chen Da-Xin %A Xu Chu-Dong %A Chen Zhi-Feng %A Liu Xiao-Dong %A Zhou Shi-Ming %A Lai Tian-Shu %A
高瑞鑫 %A 徐振 %A 陈达鑫 %A 徐初东 %A 陈志峰 %A 刘晓东 %A 周仕明 %A 赖天树 %J 物理学报 %D 2009 %I %X The RE-TM antiferromagnetic coupling behavior and magnetization reversal dynamics in passing through the fermimagnetic compensation temperature (Tm) due to laser heating of GeFeCo films are investigated using femtosecond time-resolved pump-probe Kerr spectroscopy. Owing to sample temperature passing through Tm and hence the exchange of net magnetic moment carriers, an abnormal hysteresis loop is observed. The saturation magnetization difference between magnetization states above and below coercive field is found under a same direction of magnetic field, which reveals the incomplete rigid coupling between RE and TM sub-lattices in GdFeCo. A complete ultrafast magnetization reversal and recovery dynamic process is experimentally observed at the saturation magnetic bias on the sample with Al heat sink layer. Besides, by comparing magnetization reversal at saturation magnetic bias with magnetization recovery at remanence, it was found that the magnetic field applied externally does not affect the rate of domain nucleation and growth, but only their magnetization direction. %K compensation temperature %K magnetization reversal %K antiferromagnetic coupling %K GdFeCo
补偿温度, %K 磁化翻转, %K 反铁磁耦合, %K GdFeCo %U http://www.alljournals.cn/get_abstract_url.aspx?pcid=6E709DC38FA1D09A4B578DD0906875B5B44D4D294832BB8E&cid=47EA7CFDDEBB28E0&jid=29DF2CB55EF687E7EFA80DFD4B978260&aid=74ACC9989ECA41936A5F6B5548472A58&yid=DE12191FBD62783C&vid=9FFCC7AF50CAEBF7&iid=CA4FD0336C81A37A&sid=28B3EB92D5061EA4&eid=E04FC1B5BC47587B&journal_id=1000-3290&journal_name=物理学报&referenced_num=0&reference_num=20