キラル分子磁性体[Cr(CN)6][Mn(R)-pnH(H2O)](H2O)の高周波ESR
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The electron spin resonance (ESR) measurements in the frequency range from 30 to 110 GHz were performed on a chiral molecule-based magnet [Cr(CN)6][Mn(R)-pnH(H2O)](H2O), which is thought to have ferromagnetic conical spin ordering along a axis. A sharp resonance spectrum was observed at all the temperatures measured. The resonance field shifts to the lower (higher) field for the magnetic field along a © axis as the temperature is decreased below 60 K, and reaches continuously in the low temperature ferromagnetic state. The frequency-field relation in the ferromagnetic state has linear correlation with the slope of g=2 for each directions as in the conventional ferromagnetic resonances. The line width also increases with decreasing temperature without motional narrowing, even in the ferromagnetic state. The demagnetization effects due to the shape of the crystals can explain the obtained behavior.
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