In this work polycrystalline perovskite with composition La0.7Ca0.3Fe0.05Mn0.95O3 has been produced by standard ceramic method. A considerable change occurs in magnetic, transport and magnetoresistance properties with respect to the classic composition without Fe. The introduction of a different metal, Fe, in Mn-O layer causes a decrease of about 50 K in the value of T-C. In the same way, a decrease of about 10-15% in the average magnetic moment measured at 1 T is also observed. On the other hand, the introduction of Fe does not cause any appreciable change in the value of the lattice parameter. This new compound presents 60% of giant magnetoresistance ratio at 200 K. Magnetization vs. temperature measurements in zero field cooling and field cooling show clear differences at applied fields below 80 km(-1). Such a behavior, also observed in La0.7Ca0.3MnO3 sample, is not recognizable as a simple ferromagnetic one. A qualitative discussion of the effect in the magnetic and transport properties of these compounds, caused by the substitution of some Mn atoms by Fe is given.

Influence of Fe in giant magnetoresistance ratio and magnetic properties of La[sub 0.7]Ca[sub 0.3]Mn[sub 1−x]Fe[sub x]O[sub 3] perovskite type compounds / L. Righi;P. Gorria;M. Insausti;J. Gutiérrez;J. M. Barandiarán. - In: JOURNAL OF APPLIED PHYSICS. - ISSN 0021-8979. - 81:8(1997), pp. 5767-5769. [10.1063/1.364721]

Influence of Fe in giant magnetoresistance ratio and magnetic properties of La[sub 0.7]Ca[sub 0.3]Mn[sub 1−x]Fe[sub x]O[sub 3] perovskite type compounds

RIGHI, Lara;
1997

Abstract

In this work polycrystalline perovskite with composition La0.7Ca0.3Fe0.05Mn0.95O3 has been produced by standard ceramic method. A considerable change occurs in magnetic, transport and magnetoresistance properties with respect to the classic composition without Fe. The introduction of a different metal, Fe, in Mn-O layer causes a decrease of about 50 K in the value of T-C. In the same way, a decrease of about 10-15% in the average magnetic moment measured at 1 T is also observed. On the other hand, the introduction of Fe does not cause any appreciable change in the value of the lattice parameter. This new compound presents 60% of giant magnetoresistance ratio at 200 K. Magnetization vs. temperature measurements in zero field cooling and field cooling show clear differences at applied fields below 80 km(-1). Such a behavior, also observed in La0.7Ca0.3MnO3 sample, is not recognizable as a simple ferromagnetic one. A qualitative discussion of the effect in the magnetic and transport properties of these compounds, caused by the substitution of some Mn atoms by Fe is given.
Influence of Fe in giant magnetoresistance ratio and magnetic properties of La[sub 0.7]Ca[sub 0.3]Mn[sub 1−x]Fe[sub x]O[sub 3] perovskite type compounds / L. Righi;P. Gorria;M. Insausti;J. Gutiérrez;J. M. Barandiarán. - In: JOURNAL OF APPLIED PHYSICS. - ISSN 0021-8979. - 81:8(1997), pp. 5767-5769. [10.1063/1.364721]
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Utilizza questo identificativo per citare o creare un link a questo documento: http://hdl.handle.net/11381/2463236
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