Simon Ferenc, Murányi Ferenc
Budapest University of Technology and Economics, Physics and Solids in Magnetic Fields Research Group of the Hungarian Academy of Sciences, P.O. Box 91, H-1521 Budapest, Hungary.
J Magn Reson. 2005 Apr;173(2):288-95. doi: 10.1016/j.jmr.2005.01.002.
The design and performance of an electron spin resonance spectrometer operating at 3 and 9 GHz microwave frequencies combined with a 9-T superconducting magnet are described. The probehead contains a compact two-loop, one gap resonator, and is inside the variable temperature insert of the magnet enabling measurements in the 0-9T magnetic field and 1.5-400 K temperature range. The spectrometer allows studies on systems where resonance occurs at fields far above the g approximately 2 paramagnetic condition such as in antiferromagnets. The low quality factor of the resonator allows time resolved experiments such as, e.g., longitudinally detected ESR. We demonstrate the performance of the spectrometer on the NaNiO2 antiferromagnet, the MgB2 superconductor, and the RbC60 conducting alkaline fulleride polymer.
描述了一种与9T超导磁体相结合、在3GHz和9GHz微波频率下运行的电子自旋共振光谱仪的设计和性能。探头包含一个紧凑的双环单间隙谐振器，位于磁体的可变温度插入件内，能够在0 - 9T磁场和1.5 - 400K温度范围内进行测量。该光谱仪允许对在远高于g约为2的顺磁条件下发生共振的系统进行研究，例如反铁磁体。谐振器的低品质因数允许进行时间分辨实验，如纵向检测电子自旋共振。我们展示了该光谱仪在NaNiO₂反铁磁体、MgB₂超导体和RbC₆₀导电碱性富勒烯聚合物上的性能。
