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- W2000601908 abstract "In this work, magneto-resistance and magneto-impedance (MI) data for bulk samples of pure and Y-doped La0.7Ca0.3MnO3 manganites are reported. Temperature dependent measurements were carried out sweeping the applied magnetic field H in the −6T<H<6 T range. The measurements were done with dc and ac electrical currents, varying the frequencies f up to 5 MHz, using a four-probe technique. The pure La0.7Ca0.3MnO3 sample presented a metal-insulator-transition near the ferromagnetic transition (TC=245 K). For these samples, magneto-resistance of the order 60% for H=6 T was observed close to TC. The substitution of ions of La by Y (La0.6Y0.1Ca0.3MnO3) reduced TC to 170 K but, on the other hand, increased the magneto-resistance to over 90% near TC. In the measurements with ac currents, the data for both samples presented a large magneto-impedance effect. The MI is more pronounced at high fields and for the Y-doped samples. Moreover, the Y-doped samples showed a strong hysteretic behavior that was not observed in the pure samples." @default.
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- W2000601908 date "2004-04-01" @default.
- W2000601908 modified "2023-09-30" @default.
- W2000601908 title "Magneto-impedance measurements in bulk samples of La0.7Ca0.3MnO3 and La0.6Y0.1Ca0.3MnO3" @default.
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- W2000601908 doi "https://doi.org/10.1016/j.jallcom.2003.09.083" @default.
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