Magnetoresistance of composites based on manganite La0.7Sr0.3MnO3 and oxides NiO, TiO2
Utoplov A.A. 1, Prutsakova N. V. 2, Chebanova E. V. 2, Nazarenko A. V. 3, Rudskaya A. G. 1, Letovaltsev A. O. 1, Kabirov Yu. V. 1
1Southern Federal University, Rostov-on-Don, Russia
2Don State Technical University, Rostov-on-Don, Russia
3Federal Research Center Southern Scientific Center of the Russian Academy of Sciences, Rostov-on-Don, Russia
Email: an.ut1@yandex.ru, shpilevay@mail.ru, starphish@yandex.ru, avnazarenko1@yandex.ru, arudskaya@yandex.ru, micio1@mail.ru, salv62@mail.ru

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Magnetoresistive properties of ceramic composites based on ferromagnet La0.7Sr0.3MnO3 and oxides of nickel and titanium with different ratios of components were studied. Two methods were used to prepare the composites: calcination of La0.7Sr0.3MnO3 compositions mixed with dispersed titanium and nickel powders, and La0.7Sr0.3MnO3 mixed with oxides of these metals at a temperature of 1150 oC. For the compositions 98% La0.7Sr0.3MnO3 /2% TiO2 and 88% La0.7Sr0.3MnO3 /12% NiO (mass%) the negative magnetoresistivity reaches 7.5 Keywords: ferromagnet, oxides, manganite, composite, spin-dependent tunneling, negative magnetoresistance.
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