ELECTRICAL AND MAGNETORESISTIVE PROPERTIES OF THE Ag/La2/3Sr1/3MnO3 POINT-PROBE CONTACTS

被引：0

作者：

Cerniuke, I. ^{[1
]}

Vengalis, B. ^{[1
]}

Steikuniene, A. ^{[1
]}

Grigalunaite-Vonseviciene, G. ^{[2
]}

Oginskis, A. K. ^{[1
]}

机构：

[1] Ctr Phys Sci & Technol, LT-01108 Vilnius, Lithuania

[2] Vilnius Gediminas Tech Univ, LT-10223 Vilnius, Lithuania

来源：

LITHUANIAN JOURNAL OF PHYSICS | 2015年 / 55卷 / 01期

关键词：

manganite films; magnetoresistance; 3 point-probe method; contact resistance; spreading resistance; THIN-FILMS; TRANSPORT;

D O I：

暂无

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We report electrical and magnetoresistive properties of Ag point-probe contacts formed by attaching the bent Ag wire (empty set = 0.25 mm) to the top of the La2/3Sr1/3MnO3 (LSMO) thin film magnetron sputtered at 800 degrees C on MgO(100) single crystal substrates. Significant contact magnetoresistance values (up to 13% at T = 295 K and mu H-0 = 0.73 T) have been measured for the Ag/LSMO junctions by applying a 3 point-probe method. The origin of both temperature-dependent resistance and magnetoresistance of the Ag/LSMO contacts has been explained taking into account the dominating role of spreading resistance. It was found that keeping of the films in air for 1 month as well as ultrathin overlayers (d similar to 3-5 nm) of the highly resistive multiferroic BiFeO3 magnetron sputtered onto the manganite film resulted in a significant increase of contact resistance and reduced magnetoresistance values.

引用

页码：17 / 23

页数：7

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