Light-induced magnetization reversal of high-anisotropy TbCo alloy films
Light-induced magnetization reversal of high-anisotropy TbCo alloy films
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DOI：
10.1063/1.4759109
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发表时间：
2012-10-15
影响因子：
4
通讯作者：
Mangin, Stephane
中科院分区：
文献类型：
--
作者：
Alebrand, Sabine;Gottwald, Matthias;Mangin, Stephane
使用圆偏振光的磁化反转提供了一种无需任何外部磁场即可控制磁化的方法，并且有可能彻底改变磁性数据存储。然而，为了达到超高密度数据存储，需要提供热稳定性的高各向异性介质。在这里，我们使用飞秒和皮秒激光脉冲证明了不同 TbxCo1-x 亚铁磁合金成分的全光磁化转换，并证明了各向异性场达到 6 T 的薄膜的全光磁化转换，对应于 3 x 10(6) ergs/cm(3) 的各向异性常数。仅对于可通过样品加热达到补偿温度的合金成分观察到光磁化翻转。 (C) 2012 年美国物理研究所。 [http://dx.doi.org/10.1063/1.4759109]
Magnetization reversal using circularly polarized light provides a way to control magnetization without any external magnetic field and has the potential to revolutionize magnetic data storage. However, in order to reach ultra-high density data storage, high anisotropy media providing thermal stability are needed. Here, we evidence all-optical magnetization switching for different TbxCo1-x ferrimagnetic alloy compositions using fs- and ps-laser pulses and demonstrate all-optical switching for films with anisotropy fields reaching 6 T corresponding to anisotropy constants of 3 x 10(6) ergs/cm(3). Optical magnetization switching is observed only for alloy compositions where the compensation temperature can be reached through sample heating. (C) 2012 American Institute of Physics. [http://dx.doi.org/10.1063/1.4759109]