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標題: CaRu(1-x)MnxO3的磁鬆弛現象研究
Magnetic Relaxation of CaRu(1-x)MnxO3
作者: 尤經介
You, Jing-Jie
關鍵字: magnetic relaxation
spin glass
出版社: 物理學系所
引用: 中文部分: 1. 《物理通史》, 郭奕玲、沈慧君, 凡異出版社, ( 1994 ). 2. 《磁性物理學》, 宛德福、馬興隆, 電子工業出版社. ( 1999 ). 3. 《固態物理學大辭典》, 馮端主編, 高等教育出版社, ( 1995 ). 4. 《儀器總覽 Introduction to Instrumentation – 基本物理量量測儀器》, 伍秀菁、汪若文、林美吟等編, 行政院國家科學委員會精密儀器發展中心出版, (民國八十七年十月). 5. 量子點中量子尺寸對近藤效應與磁有序之影響, 陳洋元、歐敏男,物理雙月刊(廿八卷五期) 2006年 10月. 6. “ La0.7(Ba1-xPbx)0.3CoO3系列之自旋玻璃與磁性相變研究”,張富雄,國立中正大學物理研究所碩士論文. 7. 維基百科 西文部份: a. “Spin-moment structure of Ru and Mn ions in CaRu1-xMnxO3: A magnetic Compton-profile study.” S. Mizusaki, N. Okada, T. Taniguchi, Y. Nagata, N. Hiraoka, M. Itou, Y. Sakurai, T. C. Ozaea, Y. Noro, H. Samata, Journal of Magnetism and Magnetic Materials, Volume 310, Issue 2, p. e325-e326 (2007) b. “Magnetic relaxation phenomena and cluster glass properties of La0.7-xYxCa0.3MnO3 manganites.” R. S. Freitas, L. Ghivelder, F. Damay, F. Dias, L. F. Cohen, Physical Review B, Volum 64, 144404, (2001) c. “Magnetization relaxation and aging in spin-glass (La,Y)1-xCaxMnO3(x=0.25,0.3 and 0.5) perovskite.” A. Maignan, A. Sundaresan, U. V. Varadaraju, B. Raveau, Journal of Magnetism and Magnetic Materials 184, (1998) d. Wikipedia e. Wikipedia f. “Spin Glass and Other Frustrated Systems”, Debashish Chowdhury, 1986 by World Scientific Publishing.
摘要: 我們利用在零磁場冷卻(ZFC)以及磁場冷卻(FC)下對CaRu1-xMnxO3(x=0.3)量測其磁化強度的變化,還有其Aging Effect及磁鬆弛現象的量測,藉以研究鈣鈦礦結構(perovskite)樣品CaRu1-xMnxO3(x=0.3)其磁性上的性質,在所有量測的數據皆可發現當材料中錳的比例增加後,其自旋玻璃團的行為變的更加明顯,而在磁鬆弛的量測方面,根據所量測的數據顯示出磁鬆弛與時間有關,且符合一個自然對數的時間方程式,其對lnt微分後,會有一極大值產生,此極大值發生的時間與溫度的增減、外加磁場的大小及tw的長短都有關係。
The dynamic magnetic properties of the peroskite system CaRu1-xMnxO3 have been investigated by dc magnetization measurements including relaxation and aging studing. As manganese is added in the compounds the overall results show evidence for the gradual appearance of a cluster glass behavior. For the x=0.3 sample, magnetization measurements as a function of time at various temperatures show that the magnetic relaxation is maximum at a given temperature, well below the ferromagnetic transition. The occurred time of the maximum depends on the temperature, applied field and waiting time.
其他識別: U0005-1408200711320800
Appears in Collections:物理學系所



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