Direct observation of the discrete energy spectrum of two lanthanide-based single-chain magnets by far-infrared spectroscopy
Direct observation of the discrete energy spectrum of two lanthanide-based single-chain magnets by far-infrared spectroscopy
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DOI：
10.1103/physrevb.89.174409
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发表时间：
2014-05-07
影响因子：
3.7
通讯作者：
Bogani, Lapo
中科院分区：
文献类型：
--
作者：
Haas, Sabrina;Heintze, Eric;Bogani, Lapo
研究了两种镧系单链磁体DyPhOPh和TbPhOPh在3 ~ 80 cm（-1）频率范围内的远红外光传输。光谱是在温度2 ~ 80k，磁场高达6t的条件下获得的。根据它们在DyPhOPh中的磁场依赖性，我们确定了两个观察到的吸收谱线是在晶体场内分裂的Dy3+地复用体H-6（15/2）的跃迁，与邻近的自旋耦合在一起。在tbphph中，在晶体场分裂的Tb3+接地多聚体F-7内部观察到一个跃迁(6)。该结果允许对单离子各向异性和交换在格劳伯动力学中的作用进行光谱研究。
The far-infrared optical transmission has been studied for two lanthanide-based single-chain magnets DyPhOPh and TbPhOPh in the frequency range between 3 and 80 cm(-1). The spectra were acquired at temperatures between 2 and 80 K and magnetic fields up to 6 T. Based on their magnetic field dependence in DyPhOPh two of the observed absorption lines are identified as transitions inside the crystal field split Dy3+ ground multiplet H-6(15/2), coupled to the neighboring spins. In TbPhOPh one transition was observed inside the crystal-field-split Tb3+ ground multiplet F-7(6). The results allow a spectroscopic investigation of the role of single-ion anisotropy and exchange in Glauber dynamics.