Control of the colossal magnetoresistance by strain effect in Nd0.5Ca0.5MnO3 thin films

被引：31

作者：

Buzin, ER

Prellier, W

Simon, C

Mercone, S

Mercey, B

Raveau, B

Sebek, J

Hejtmanek, J

机构：

[1] Lab CRISMAT, CNRS, UMR 6508, F-14050 Caen, France

[2] Inst Phys, Prague 18221 8, Czech Republic

来源：

APPLIED PHYSICS LETTERS | 2001年 / 79卷 / 05期

关键词：

D O I：

10.1063/1.1390313

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

Thin films of Nd0.5Ca0.5MnO3 manganites with colossal magnetoresistance (CMR) properties have been synthesized by the pulsed-laser deposition technique on (100)-(SrTiO3). The lattice parameters of these manganites and correlatively their CMR properties can be controlled by the substrate temperature T-S. The maximum CMR effect at 50 K, calculated as the ratio rho (H=0T)/rho (H=7T) is 10(11) for a deposition temperature of T-S=680 degreesC. Structural studies show that the Nd0.5Ca0.5MnO3 film is single phase, [010]-oriented and has a pseudocubic symmetry of the perovskite subcell with a=3.77 Angstrom at room temperature. We suggest that correlation between lattice parameters, CMR, and substrate temperature T-S result mainly from substrate-induced strains which can weaken the charge-ordered state at low temperature. (C) 2001 American Institute of Physics.

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页码：647 / 649

页数：3

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