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The relationship between the cooperative Jahn-Teller effect and the internal friction behavior for the charge ordered La1-xCaxMnO3 (0.50 <= x <= 0.85) | |
其他题名 | The relationship between the cooperative jahn-teller effect and the internal friction behavior for the charge ordered La_(1-x)Ca_xMnO_3(0.50≤x≤0.85) |
2003 | |
发表期刊 | ACTA METALLURGICA SINICA |
ISSN | 0412-1961 |
摘要 | The cooperative Jahn-Teller lattice distortion in the charge ordered (CO) state for La1-xCaxMnO3 (0.50less than or equal to x less than or equal to0.85) was studied using the powder XRD and the internal friction. With decreasing temperature from the high temperature to the charge ordering transition temperature T-CO, the shear modulus softens conspicuously; nevertheless, when the temperature is cooled below T-CO, dramatic stiffening of the shear modulus driven by the development of the cooperative Jahn-Teller distortion was observed. The relative stiffening of the shear modulus DeltaG/G varies with the Ca2+ concentration, and reaches the largest value at x=0.75. An internal friction peak appears at T-CO, its height decreases with increasing measuring frequency and its position is frequency independent, showing a typical structural phase transition. The non-linear frequency dependence of the peak height can be fitted using the equation Q(max)(-1)/Q(min)(-1) = a x f(-b). |
关键词 | MAGNETIC-PROPERTIES DIFFRACTION PEROVSKITE STABILITY TRANSPORT SPIN charge ordered state cooperative Jahn-Teller lattice distortion shear modulus internal friction La1-xCaxMnO3 |
收录类别 | CSCD |
语种 | 英语 |
WOS记录号 | WOS:000186981500014 |
CSCD记录号 | CSCD:1267854 |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://ir.hfcas.ac.cn:8080/handle/334002/55507 |
专题 | 中国科学院合肥物质科学研究院 |
推荐引用方式 GB/T 7714 | . The relationship between the cooperative Jahn-Teller effect and the internal friction behavior for the charge ordered La1-xCaxMnO3 (0.50 <= x <= 0.85)[J]. ACTA METALLURGICA SINICA,2003,39. |
APA | (2003).The relationship between the cooperative Jahn-Teller effect and the internal friction behavior for the charge ordered La1-xCaxMnO3 (0.50 <= x <= 0.85).ACTA METALLURGICA SINICA,39. |
MLA | "The relationship between the cooperative Jahn-Teller effect and the internal friction behavior for the charge ordered La1-xCaxMnO3 (0.50 <= x <= 0.85)".ACTA METALLURGICA SINICA 39(2003). |
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