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The electric and magnetic properties of Cu doped and pure/undoped hydrogels were investigated by impedance spectroscopy and electron spin resonance techniques, respectively. The capacitance and dissipation factor (tan δ) were measured in the frequency range of 100 Hz-10 MHz at room temperature. The Cole-Cole plots for the Cu doped dry and pure dry hydrogels have been used to describe the characteristic...
Deuterated monoclinic RbD_{2}PO_{4} (DRDP) doped with chromium Cr^{5+} is studied by EPR in 90 K to 400 K temperature range. EPR reveals two types of paramagnetic centers: single Cr^{5+} (S = 1/2) complex and Cr^{5+}-Cr^{5+} coupled pairs with effective spin S = 1. The EPR line splitting of single Cr^{5+} complex in DRDP versus temperature agrees with the unit cell multiplication. The splitting of...
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