Memory Effect in Thin Thermocycling-modified La0.67Ca0.33MnO3 Films

被引：0

作者：

Anisimovas, Fiodoras ^{[1
]}

Asmontas, Steponas ^{[1
]}

Gradauskas, Jonas ^{[1
]}

Kiprijanovic, Oleg ^{[1
]}

Vengalis, Bonifacas ^{[1
]}

机构：

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

来源：

MATERIALS SCIENCE-MEDZIAGOTYRA | 2012年 / 18卷 / 01期

关键词：

manganite thin films; thermocycling; highly resistive states; martensitic-type transformations; memory effect;

D O I：

10.5755/j01.ms.18.1.1333

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Nonhomogeneous thin La0.67Ca0.33MnO3 films, having T-m in 180 K - 200 K temperature range, were thermocycled between 80 K and 210 K using liquid nitrogen. After the thermocycling it was confirmed formation of highly resistive state with additional low temperature peak of resistance with maximum at 115 K when measuring R-T plots. Measurements of electroresistive effect in this state using low dc of different values and performed in cooling run reveal discontinuities of R-T plots. It is proposed formation of two different high resistive states: at low temperatures and at vicinity of T-m. The discontinuities disclose switching between these two states initiated by substrate-induced long-range strain and by manifestation of memory effect. This interpretation of experimental results explains appearing of low temperature peak based on influence of the long-range strains on formation of high resistive interlayers in the film during the thermocycling. We argue that the interlayers acquire memory properties after being modified by martensitic-type transformations.

引用

页码：8 / 11

页数：4