Powder samples with nominal composition La0.6Sr0.1TexMnO3 （x = 0.00, 0.05, 0.10, 0.15, 0.20） were prepared using the sol-gel method with thermal treatment up to 1473 K. On the basis of powder X-ray diffraction （XRD...Powder samples with nominal composition La0.6Sr0.1TexMnO3 （x = 0.00, 0.05, 0.10, 0.15, 0.20） were prepared using the sol-gel method with thermal treatment up to 1473 K. On the basis of powder X-ray diffraction （XRD）, thermogravimetric and magnetic measurements, it was found that almost all of the Te and a few of the Mn ions were lost from the samples when they were calcined at 1473 K. The reason for the Te loss and a quantitative phase analysis for the samples calcined at 1473 K are discussed in detail.展开更多
The bias field dependence of the rotation direction of the dumbbells,contracted from multi-branched domains,was experimentally studied.Moreover,it was found that the rotation direction of these dumbbells can be revers...The bias field dependence of the rotation direction of the dumbbells,contracted from multi-branched domains,was experimentally studied.Moreover,it was found that the rotation direction of these dumbbells can be reversed by increasing the amplitude of the testing bias pulses with quite narrow width.展开更多
The self-collapse phenomenon of dumbbell domains was studied experimentally.The coincidence of the bias field region of self-collapse with that of collapse for both the first and second kinds of dumbbells manifests th...The self-collapse phenomenon of dumbbell domains was studied experimentally.The coincidence of the bias field region of self-collapse with that of collapse for both the first and second kinds of dumbbells manifests that two necessary conditions for self-collapse are:(1)sufficiently high number of vertical Bloch lines(VBLs)in their walls and(2)these VBLs are in high compression,and there exists the similarity between self-collapse and collapse in mechanism.展开更多
基金supported by the Natural Science Foundation of Hebei Province (No. E2011205083)the Key Item Science Foundation of Hebei Province, China (No.10965125D+3 种基金 No.08965108D)the National Natural Science Foundation of China (No.NSF-10774037No.10074013)the National High Technology Research and Development Program of China (No. 2007AA03Z100)
文摘Powder samples with nominal composition La0.6Sr0.1TexMnO3 （x = 0.00, 0.05, 0.10, 0.15, 0.20） were prepared using the sol-gel method with thermal treatment up to 1473 K. On the basis of powder X-ray diffraction （XRD）, thermogravimetric and magnetic measurements, it was found that almost all of the Te and a few of the Mn ions were lost from the samples when they were calcined at 1473 K. The reason for the Te loss and a quantitative phase analysis for the samples calcined at 1473 K are discussed in detail.
基金Supported in part by the National Science Foundation of China.No.19274016。
文摘The bias field dependence of the rotation direction of the dumbbells,contracted from multi-branched domains,was experimentally studied.Moreover,it was found that the rotation direction of these dumbbells can be reversed by increasing the amplitude of the testing bias pulses with quite narrow width.
基金Supported in part by the National Natural Science Foundation of China,Grant No.1880110.
文摘The self-collapse phenomenon of dumbbell domains was studied experimentally.The coincidence of the bias field region of self-collapse with that of collapse for both the first and second kinds of dumbbells manifests that two necessary conditions for self-collapse are:(1)sufficiently high number of vertical Bloch lines(VBLs)in their walls and(2)these VBLs are in high compression,and there exists the similarity between self-collapse and collapse in mechanism.
