Large positive magnetoresistance effect below Curie temperature in In1.90−xMn0.1SnxO3

Distinct insulating state below the Curie point in Pr 0

Magnetization, resistivity, thermal expansion, thermopower, and neutron powder diffraction data are presented for the perovskite manganite Pr0.7Ba0.3MnO3. A distinct ferromagnetic insulating state, similar to that observed in the La0.88Sr0.12MnO3 system, is observed in the temperature range between the paramagneticferromagnetic transition at TFM'180 K and the broad metal-insulator transition ne...

Temperature Dependence of the Magnetoresistance Effect in Metals

The paper examines a well-known experimental property of increase of the magnetoresistance effect in a metal observed with a decrease of the metal temperature. This property is explained by the fact that magnetoresistance is a quantity proportional to the relaxation time of the electric conduction of the metal sample which is a parameter observed in the absence of the magnetic field. Since the ...

PRESSURE EFFECT ON CURIE TEMPERATURE FOR Co1-xBx AMORPHOUS ALLOYS

Pressure effect on Curie temperature, dTc/dp, for amorphous Col-,B, alloys is estimated indirectly from forced volume magnetostriction even in Tc > Tcry. Results estimated indirectly show smaller values compared with those measured directly, and are consistent with thermal expansion. The value of dTc/dp extrapolated to Co agrees with that for crystalline Co.

POSITIVE MAGNETORESISTANCE IN THE AMORPHOUS GdCo3 FILMS : COULOMB INTERACTION EFFECT ?

We report preliminary measurements of the magnetoresistance in sputtered GdCo3 thin films from 4.2 to 100 K and in magnetic fields up to 6 T. Beyond technical saturation, the magnetoresistance is positive, varies linearly with the applied field and is nearly temperature independent. A possible contribution from electron interadions is discussed. GdCos target in an Ar atmosphere onto water-coole...

Enhanced temperature effect on magnetoresistance in Fe/Mo multilayers