کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1811324 | 1025592 | 2011 | 8 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Elastic anomalies of La0.67Sr0.33âxBaxMnO3 in the vicinity of TC
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
فیزیک و نجوم
فیزیک ماده چگال
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: Elastic anomalies of La0.67Sr0.33âxBaxMnO3 in the vicinity of TC Elastic anomalies of La0.67Sr0.33âxBaxMnO3 in the vicinity of TC](/preview/png/1811324.png)
چکیده انگلیسی
With a view to understand the elastic behaviour of a material system, La0.67Sr0.33âxBaxMnO3 (where x=0, 0.1, 0.2, and 0.33) especially in the vicinity of their magnetic transition temperature TC, a systematic investigation of ultrasonic velocity over a temperature range 300-400Â K has been carried out. The materials prepared by citrate gel route, were characterized structurally by XRD and on analyzing the XRD patterns, it has been concluded that all the samples are having rhombohedral structure with space group of R3Ìc. The magnetic (TC) transition temperatures determined by AC susceptibility measurements are found to decrease continuously with increasing barium concentration. Finally, the ultrasonic longitudinal velocities of all the samples are found to exhibit considerable softening in the vicinity of their magnetic transition temperatures, TC and the observed behaviour is explained using mean field theory and Jahn-Teller theorem.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Physica B: Condensed Matter - Volume 406, Issue 19, 1 October 2011, Pages 3568-3575
Journal: Physica B: Condensed Matter - Volume 406, Issue 19, 1 October 2011, Pages 3568-3575
نویسندگان
G. Lalitha, P. Venugopal Reddy,