Abstract
The transport properties, ac susceptibility χ, and EPR spectra have been studied for the insulator polycrystalline manganite Pr2/3Ca1/3MnO3 undergoing the orbital (O) and charge (C) orderings below T CO ∼ 250 K that lead to antiferromagnetic (AF) ordering below T N ≈ 155 K. Above T C ∼ 110 K, the χ′(T) dependence indicates that the sample contains a phase undergoing a second-order transition from the paramagnetic to ferromagnetic state. In the vicinity of T C , the colossal magnetoresistance effect is observed. The EPR spectrum characteristics are sensitive to the development of the O/C and AF orderings, and they show peculiarities at T CO and T N . Between T CO and T N , the temperature dependence of the g factor exhibits a characteristic point that can be related to the appearance of the electric polarization revealed in manganites of this class.
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Original Russian Text © V.A. Ryzhov, A.V. Lazuta, I.A. Kiselev, V.P. Khavronin, I.O. Troyanchuk, S.V. Trukhanov, 2011, published in Fizika Tverdogo Tela, 2011, Vol. 53, No. 5, pp. 906–911.
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Ryzhov, V.A., Lazuta, A.V., Kiselev, I.A. et al. Magnetic and transport properties of the charge-ordered manganite Pr2/3Ca1/3MnO3 . Phys. Solid State 53, 964–969 (2011). https://doi.org/10.1134/S1063783411050258
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DOI: https://doi.org/10.1134/S1063783411050258