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Enhancement of the low field magnetoresistance by grain boundary modification in Sr2FeMoO6+delta

机译:Sr2FeMoO6 +δ晶界修饰增强低场磁阻

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摘要

We study the magnetic and electric properties of polycrystalline Sr2FeMoO6+delta with controlled oxygen content, for nominal values delta = 0 and 0.04. While the magnetization and lattice parameters are the same in both samples, the resistivity and the magnetoresistance are greatly enhanced in the delta = 0.04 sample. This behavior is related to the formation of an impurity (insulating) phase at the grain boundaries, thus reinforcing the intergrain tunneling barrier. (C) 2002 Elsevier Science B.V. All rights reserved. [References: 11]
机译:我们研究了具有受控氧含量的多晶Sr2FeMoO6 + delta的磁性能和电性能,标称值delta = 0和0.04。尽管两个样品的磁化和晶格参数相同,但在delta = 0.04样品中,电阻率和磁阻得到了极大的提高。此行为与在晶界处形成杂质(绝缘)相有关,从而增强了晶间隧穿势垒。 (C)2002 Elsevier Science B.V.保留所有权利。 [参考:11]

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