Low-temperature magnetic force microscopy of colossal magnetoresistive films

被引：8

作者：

Chen, CC ^{[1
]}

Lu, Q ^{[1
]}

de Lozanne, A ^{[1
]}

机构：

[1] Univ Texas, Dept Phys, Austin, TX 78712 USA

来源：

APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING | 1998年 / 66卷 / Suppl 1期

关键词：

Microscopy; Magnetic Field; External Magnetic Field; Magnetic Force; Thermal Fluctuation;

D O I：

10.1007/s003390051322

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We show a detailed magnetic force microscope study of the magnetic domain behavior in La1-xCaxMnO3 films under the influence of temperature, topographic sample defects and external magnetic field. At low temperatures, typically about 140 degrees below T-c = 245 K, domains were strongly coupled to each other, but could still be affected by thermal fluctuations. As we warmed the sample up, domains became highly mobile near T-c. Near T-c, sample scratches were able to capture nearby domains, whereas they did not affect domains when temperature is much lower than T-c. Above T-c all domains disappeared, with some of them disappearing earlier.

引用

页码：S1181 / S1184

页数：4

共 11 条

[1] Size dependence of switching thresholds for pseudo spin valve MRAM cells [J].