Magnetoresistance effect in (La, Sr)MnO3 bicrystalline films

被引：6
作者：
Alejandro, G. [1 ]
Steren, L. B. [2 ]
Pastoriza, H. [1 ]
Vega, D. [2 ]
Granada, M. [1 ]
Rojas Sanchez, J. C. [1 ]
Sirena, M. [1 ]
Alascio, B. [1 ]
机构：
[1] Ctr Atom Bariloche CNEA, RA-8400 San Carlos De Bariloche, Pcia Rio Negro, Argentina
[2] Ctr Atom Bariloche CNEA, RA-1650 San Martin, Pcia De Buenos, Argentina
来源：
JOURNAL OF PHYSICS-CONDENSED MATTER | 2010年 / 22卷 / 34期
关键词：
LOW-FIELD MAGNETORESISTANCE; LA0.67SR0.33MNO3; THIN-FILMS; GRAIN-BOUNDARIES; MAGNETIC-ANISOTROPY; TEMPERATURE; DEPENDENCE; ESR;
D O I：
10.1088/0953-8984/22/34/346007
中图分类号：
O469 [凝聚态物理学];
学科分类号：
070205 ;
摘要：
The angular dependence of the magnetoresistance effect has been measured on bicrystalline La0.75Sr0.25MnO3 films. The measurements have been performed on an electronically lithographed Wheatstone bridge. The study of the angular dependence of both the magnetoresistance and the resistance of single-crystalline and grain-boundary regions of the samples allowed us to isolate two contributions of low-field magnetoresistance in manganites. One of them is associated with the spin-orbit effect, i.e. the anisotropic magnetoresistance of ferromagnetic compounds, and the other one is related to spin-disorder regions at the grain boundary. Complementary x-ray diffraction, ferromagnetic resonance and low temperature magnetization experiments contribute to the characterization of the magnetic anisotropy of the samples and the general comprehension of the problem.
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页数：10
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