Characterization of transport and magnetic properties in thin film La0.67(CaxSr1-x)0.33 MnO3 mixtures

被引：17

作者：

Broussard, PR ^{[1
]}

Qadri, SB ^{[1
]}

Browning, VM ^{[1
]}

Cestone, VC ^{[1
]}

机构：

[1] USN, Res Lab, Washington, DC 20375 USA

来源：

JOURNAL OF APPLIED PHYSICS | 1999年 / 85卷 / 09期

关键词：

D O I：

10.1063/1.370162

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

We have grown thin films of (100)-oriented La-0.67(CaxSr1-x)(0.33)MnO3 on (100) NdGaO3 substrates by off-axis sputtering. We have looked at the changes in the resistivity and magnetoresistance of the samples as the Ca/Sr ratio was varied. We find that as the calcium fraction is decreased, the lattice match to the substrate decreases, and the films become more disordered, as observed in transport measurements and the variation in Curie and peak resistance temperatures. We find a correlation between the temperature independent and T-2 terms to the low temperature resistivity. The room temperature magnetoresistance exhibits a maximum as the peak temperature is increased by the substitution of Sr for Ca, and a change in the field dependence to the resistivity at room temperature is observed. [S0021-8979(99)03209-0].

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页码：6563 / 6566

页数：4

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