期刊文献+
共找到1篇文章
< 1 >
每页显示 20 50 100
Ferromagnetic–paramagnetic transition temperature in bulk and nanostructured La_(0.7)Sr_xCa_(0.3-x)MnO_3(x=0.10, 0.15, and 0.20) manganite materials 被引量:1
1
作者 Somasundaram Praveen Kumar kathiresan sakthipandi +3 位作者 Ramamurthy Gayathiri Mathu Sridhar Panday Arumugam Karthik Venkatachalam Rajendran 《Rare Metals》 SCIE EI CAS CSCD 2017年第6期501-511,共11页
Series of bulk and nanostructured La0.7SrxCa0.3-xMnO3(x = 0.10, 0.15, and 0.20) manganites were synthesized and characterized using different techniques. In the series, both the bulk and nanostructured La0.7Sr0.10Ca... Series of bulk and nanostructured La0.7SrxCa0.3-xMnO3(x = 0.10, 0.15, and 0.20) manganites were synthesized and characterized using different techniques. In the series, both the bulk and nanostructured La0.7Sr0.10Ca0.20MnO3 and La0.7Sr0.20Ca0.10MnO3 manganites have orthorhombic and rhombohedral structures, whereas La0.7Sr0.15Ca0.15MnO3 manganite has rhombohedral and orthorhombic structures, respectively. Online ultrasonic velocity and attenuation measurements were taken through an indigenously designed ultrasonic setup, and the analysis was done from 300 to 400 K during the aging of the samples to explore the structural/phase transitions. The bulk and nanocrystalline La0.7SrxCa0.3-xMnO3 perovskite samples show the particle size distribution in the range of 197-943 and 24-93 nm, respectively. The addition of Sr^2+ alters the size of particles, which decrease in size. The observed anomaly in ultrasonic velocities, attenuations, and elastic moduli is correlated with the ferromagnetic-paramagnetic(FM-PM) transition temperature(TC) in both bulk and nanocrystalline perovskites. In addition, the shift in TC and the magnitude and width of observed anomaly are correlated with the value of x to study the behavior of TC. 展开更多
关键词 Magnetic material Ultrasonic measurements Elastic properties Phase transition
原文传递
上一页 1 下一页 到第
使用帮助 返回顶部