R0 .6Sr0.4MnO3（R = Pr和Nd）的微波磁吸收
Microwave magnetoabsorption in R0.6Sr0.4MnO3 (R = Pr and Nd)
摘要：
报道了室温下R0.6Sr0.4MnO3（R = Pr和Nd）样品的微波磁吸收（P）。在宽频率范围（f = 0.1 ~ 4GHz）的微波磁场下，用矢量网络分析仪和封装在上述样品中的铜带线圈测量了P与直流磁场（-2.5kOe ~+2.5kOe）的关系。随着外部直流磁场从最大磁场减小，P最初增加，并在临界磁场下显示最大值，然后随着磁场接近零而减小。临界场随着微波信号频率的增加而增加。所获得的光谱的线形分析表明，所观察到的功能P是由铁磁共振（FMR）在R = Pr和电子顺磁共振（ESR）在R = Nd样品，这是使用共面波导的宽带磁共振光谱仪确认。
英文摘要：
We report microwave magnetoabsorption (P) at room temperature in R0.6Sr0.4MnO3 (R = Pr and Nd) samples. P as a function of dc magnetic field (-2.5 kOe to +2.5 kOe) was measured for a broad frequency range (f = 0.1 - 4 GHz) of microwave magnetic field using a vector network analyzer and a copper strip coil which encloses one of the above samples. As the external dc magnetic field decreased from the maximum field, P initially increases and shows a maximum for a critical field and then decreases as the field approaches zero. The critical field increases with increasing frequency of the microwave signal. Line shape analysis of the obtained spectra suggests that the observed features in P are caused by ferromagnetic resonance (FMR) in R = Pr and electron paramagnetic resonance (ESR) in R = Nd samples, which were confirmed using a coplanar waveguide-based broadband magnetic resonance spectrometer.
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