Observation on Effect of Rare Earth Element on Time Series of AC Conductivities in Rare Earth Nitrate Crystals Having Metastable Phenomena (General)

概要

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Time series of ac conductivities at 2 kHz have been measured at 223.15 K for c-axis of the rare earth nitrate crystals R(NO_3)_36H_2O, having the metastable phenomena, where R is rare earth element (R=<57>^La, <58>^Ce, <59>^Pr, <60>^Nd, <62>^Sm, <63>^Eu, <64>^Gd, <65>^Tb, <66>^Dy, <67>^Ho, <68>^Er, <69>^Tm, <70>^Yb and <71>^Lu). The variation in the time series of the conductivities was found by changing the rare earth element in the crystal. The power spectral density P(f) derived from the time series data, shows dependence on frequency f, represented by power law P(f) a f^<-α> and peak near the frequency f_<Max>. The numerical values of the exponent α and f_<Max> are dependent on the rare earth element sequence. The form of the function for f_<Max> to the sequence of R is similar to the magnetic characteristics.
社団法人日本物理学会の論文
2003-10-15