Abstract
The magnetoresistance (MR) of substituted lanthanum manganite (La0.5Eu0.5)0.7Pb0.3MnO3 has been measured in a pulsed magnetic field with amplitude H = 250 kOe at various temperatures. It is established that temperature dependence of the MR relaxation parameter τ(T) is correlated with temperature dependence of the electric resistance R(T). A mechanism of relaxation is proposed that is related to the relaxation of conducting and dielectric phases in the volume of a sample under the conditions of phase separation. It is shown that the behavior of τ is related to the number of phase boundaries in the volume.
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Original Russian Text © A.A. Bykov, S.I. Popkov, K.A. Shaykhutdinov, K.A. Sablina, 2012, published in Pis’ma v Zhurnal Tekhnicheskoi Fiziki, 2012, Vol. 38, No. 23, pp. 89–94.
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Bykov, A.A., Popkov, S.I., Shaykhutdinov, K.A. et al. Relaxation of magnetoresistance of single-crystalline (La0.5Eu0.5)0.7Pb0.3MnO3 in a pulsed magnetic field. Tech. Phys. Lett. 38, 1080–1082 (2012). https://doi.org/10.1134/S1063785012120036
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DOI: https://doi.org/10.1134/S1063785012120036