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Article Dans Une Revue Applied physics. A, Materials science & processing Année : 2021

Stability of charge ordering in La0.5−xHoxCa0.5MnO3 polycrystalline manganites

Résumé

Magnetotransport properties of La0.5-xHoxCa0.5MnO3 (x=0.05 and 0.1) polycrystalline samples were investigated in order to study the effect of magnetic Ho 3+ ions on the stability of the charge ordering (CO) and magnetic phase coexistence in pristine La0.5Ca0.5MnO3. Our samples were synthesized by using sol-gel method. Temperature dependence of resistivity shows an insulating behavior with high resistivity values, confirming the presence of long-range CO. The application of 7 T magnetic field slightly reduces resistivity values and demonstrates relatively small magnetoresistance (MR) values (-MR(T) did not exceed 14 % under 7 T applied field). This observation indicates that the CO in the Ho-based specimens is strong, which indicates that Ho-substitution for La in La0.5Ca0.5MnO3 gives more strength to the CO.
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Dates et versions

hal-03379841 , version 1 (04-11-2021)

Identifiants

Citer

S. Dhieb, A. Krichene, F. Fettar, Nassira Boudjada, W. Boujelben. Stability of charge ordering in La0.5−xHoxCa0.5MnO3 polycrystalline manganites. Applied physics. A, Materials science & processing, 2021, 127 (9), pp.700. ⟨10.1007/s00339-021-04848-4⟩. ⟨hal-03379841⟩

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