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Magnetoresistive study of antiferromagnetic--weak ferromagnetic transition in single-crystal La2CuO4+δ

B. I. Belevtsev, N. V. Dalakova, V. N. Savitsky, A. V. Bondarenko, A. S. Panfilov, I. S. Braude

cond-mat.str-elarXiv:cond-mat/0312409

Abstract

The resistive measurements were made to study the magnetic field-induced antiferromagnetic (AF) - weak ferromagnetic (WF) transition in La2CuO4 single-crystal. The magnetic field (DC or pulsed) was applied normally to the CuO2 layers. The transition manifested itself in a drastic decrease of the resistance in critical fields of ~5-7 T. The study is the first to display the effect of the AF -WF transition on the conductivity of the La2CuO4 single-crystal in the parallel - to - CuO2 layers direction. The results provide support for the 3-dimensional nature of the hopping conduction of this layered oxide.

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