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INCREASED MAGNETORESISTANCE OF RARE-EARTH-DOPED(Sm,Gd,Dy) ON La_(0.7)Sr_(0.3)MnO_3 AT ROOM TEMPERATURE

Guoqing Yan

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Abstract

A series of samples La0.7-xSmxSr0.3MnO3,La0.7-xGdxSr0.3MnO3 and La0.7-x DyxSr0.3MnO3(x=0.00,0.10,0.20,0.30)are prepared by solid-state reaction.The influence of substituting the rare-earth ion for La on Curie temperature(Tc)and magnetoresistance(MR)through the measurement of M～T curves and ρ～T curves.It can be shown that doping rare-earth is a effective measure to change the Curie temperature of Perovskite manganite and increase MR;and an appropriate doping proportion will generate a high magnetoresistance at room temperature.

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What this paper is about

A series of samples La0.7-xSmxSr0.3MnO3,La0.7-xGdxSr0.3MnO3 and La0.7-x DyxSr0.3MnO3(x=0.00,0.10,0.20,0.30)are prepared by solid-state reaction.The influence of substituting the rare-earth ion for La on Curie temperature(Tc)and magnetoresistance(MR)through the measurement of M～T curves and ρ～T curves.It can be shown that doping rare-earth is a effective measure to change the Curie temperature of Perovskite manganite and increase MR;and an appropriate doping proportion will generate a high magnetoresistance at room temperature.

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Available abstract

A series of samples La0.7-xSmxSr0.3MnO3,La0.7-xGdxSr0.3MnO3 and La0.7-x DyxSr0.3MnO3(x=0.00,0.10,0.20,0.30)are prepared by solid-state reaction.The influence of substituting the rare-earth ion for La on Curie temperature(Tc)and magnetoresistance(MR)through the measurement of M～T curves and ρ～T curves.It can be shown that doping rare-earth is a effective measure to change the Curie temperature of Perovskite manganite and increase MR;and an appropriate doping proportion will generate a high magnetoresistance at room temperature.

Key concepts: Manganite, Curie temperature, Magnetoresistance, Materials science, Colossal magnetoresistance, Doping, Perovskite (structure), Rare earth

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INCREASED MAGNETORESISTANCE OF RARE-EARTH-DOPED(Sm,Gd,Dy) ON La_(0.7)Sr_(0.3)MnO_3 AT ROOM TEMPERATURE — Research Paper | ScholarLens