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http://tdr.lib.ntu.edu.tw/jspui/handle/123456789/28477完整後設資料紀錄
| DC 欄位 | 值 | 語言 |
|---|---|---|
| dc.contributor.advisor | 陳政維 | |
| dc.contributor.author | Zhao-Ming Lu | en |
| dc.contributor.author | 呂昭民 | zh_TW |
| dc.date.accessioned | 2021-06-13T00:09:25Z | - |
| dc.date.available | 2007-08-01 | |
| dc.date.copyright | 2007-08-01 | |
| dc.date.issued | 2007 | |
| dc.date.submitted | 2007-07-26 | |
| dc.identifier.citation | References
1. D. Rout, “Structural, Electrical and Raman spectroscopic studies of Lead Ytterbium Tantalate based Ceramics”. (2006). 2. G. A. Smolenskii, A. I. Agranovskaya, and V. A. Isupov, “New ferroelectrics of complex compound,” Sov. Phys. Solid State., 1, 907-908 (1959). 3. Shōichiro Nomura, Hitoshi Takabayashi and Takehiko Nakagawa, “Dielectric and Magnetic Properties of Pb(Fe1/2Ta1/2)O3,” Jpn. J. Appl. Phys. 7, 600-604 (1968). 4. G. A. Smolensky, “Physical Phenomena in Ferroelectrics with Diffused Phase Transition,” J. Phys. Soc. Jap., 28 (1970). 5. A. Deschanvres, B. Raveau, and F. Tollemer, Bull. Soc. Chim. Fr., 4077 (1967). 6. B. Bochu, M. N. Deschizeaux, and J. C. Joubert, J. Solid State Chem. 29, 291 (1979). 7. M. A. Subramanian, L. Dong, N. Duan, B. A. Reisner, and A. W. Sleight, J. Solid State Chem. 151, 323 (2000). 8. A. P. Ramirez, M. A. Subramanian, M. Gardel, G. Blumberg, D. Li, T.Vogt, and S. M. Shapiro, Solid State Commun. 115, 217, (2000). 9. D. C. Sinclair, T. A. Adams, F. D. Morrison, and A. R. West, Appl. Phys. Lett. 80, 2153, (2002). 10. A. Koitzsch, G. Blumberg, A. Gozar, B. Dennis, A. P. Ramirez, S. Trebst, and S. Wakimoto, Physical Rev B, 65, 052406 (2002). 11. J. Valasek, “ Piezo-Electric and Allied Phenomena in Rochelle Salt,” Physical Review, 17,475 (1921). 12. George. A. Samara, “The relaxational properties of compositionally disordered ABO3 perovskites”, Journal of Physics: Condensed Matter, 15, R367 (2003). 13. W.D. Kingery, H.K. Bowen, and D.R. Uhlmann Introduction to Ceramics. John Wiley and Sons. (1976). 14. Basics of Measuring the Dielectric Properties of Materials, Application Note 1217-1, Hewlett-Packard Inc. 15. Gorur G. Raju, “Dielectrics in electric fields”. 16. Wei Chen, Xi Yao and Xiaoyong Wei, “Relaxor behavior of (Sr, Ba, Bi)TiO3 ferroelectric ceramic”, Solid State Communications 141 84–88, (2007). 17. Z. Yu, C. Ang, R. Guo, A.S. Bhalla, J. Appl. Phys. 92 2655, (2002). 18. C. Ang, Z. Jing, Z. Yu, J. Phys. Condens. Matter 14 8901. (2002). 19. I A Santos and J A Eiras, “Phenomenological description of the diffuse phase transition in ferroelectrics”, J. Phys.: Condens. Matter 13 11733–11740, (2001). 20. Kirilov V V and Isupov V A 1973 Ferroelectrics 5 3. 21. C. H. Wu, “Dielectric Properties of ACu3Ti4O12 (A = Ca, La, Nd, Gd)”, Master thesis of NTU, (2007). 22. R. K. Grubbs, E. L. Venturini, P. G. Clem, J. J. Richardson, B. A. Tuttle, and G. A. Samara, “Dielectric and magnetic properties of Fe- and Nb-doped CaCu3Ti4O12”, PHYSICAL REVIEW B 72, 104111 (2005). 23. T. Katsufuji, S. Mori, M. Masaki, Y. Moritomo, N. Yamamoto, and H. Takagi,“Dielectric and magnetic anomalies and spin frustration in hexagonal RMnO3 .R=(Y, Yb, and Lu)”, PHYSICAL REVIEW B, 64, 104419 (2001). 24. G. Lawes, A. P. Ramirez, C.M. Varma, and M. A. Subramanian, “Magnetodielectric Effects from Spin Fluctuations in Isostructural Ferromagnetic and Antiferromagnetic Systems”, PHYSICAL REIEW LETTERS , 91, 25 (2003). | |
| dc.identifier.uri | http://tdr.lib.ntu.edu.tw/jspui/handle/123456789/28477 | - |
| dc.description.abstract | 在這論文當中，以氧化鐵(Fe3O4)用不同比例摻雜CaCu3Ti4O12，並以固態反應法以1050℃ 燒結製備樣品。在(CaCu3Ti4O12)0.99(Fe3O4)0.01的樣品，介電常數從104急遽降低至65。CaCu3Ti4O12在TN = 25 K時有反鐵磁相變，在(CaCu3Ti4O12)1-x(Fe3O4)x (x = 0.01, 0.05, 0.1, 0.2, and 0.3) 的樣品，在 TN 以下介電常數會隨溫度降低而減少，提供了電極化與磁性之間的耦合現象。其中(CaCu3Ti4O12)0.95(Fe3O4)0.05 及(CaCu3Ti4O12)0.9(Fe3O4)0.1兩個樣品有擴散相變(Diffuse Phase transition)，由modified Curie–Weiss law，Santos-Eiras equation 及 Vogel–Fulcher relationship，我們知道擴散相變是因為這兩個樣品有ferroelectric relaxor 的特性。 | zh_TW |
| dc.description.abstract | The dielectric properties of (CaCu3Ti4O12)1-x(Fe3O4)x (x = 0.01, 0.05, 0.1, 0.2, 0.3 and 0.4) have been studied, only 1% mixing of Fe3O4 dramatically quenches the huge of 104 down to 65 over the measured temperature range from 15 K to 300 K. At low T, CaCu3Ti4O12 (CCTO) transforms into an antiferromagnetic phase at TN = 25 K. The dielectric constant of (CaCu3Ti4O12)1-x(Fe3O4)x (x = 0.01, 0.05, 0.1, 0.2 and 0.3) shows sharp decrease below TN, providing possible coupling between the polarization and magnetization.
In addition, the (CCTO)0.95(Fe3O4)0.05 and (CCTO)0.9(Fe3O4)0.1 ceramics have also shown diffuse phase transition (DPT), which is a typical feature of relaxor ferroelectrics. The modified Curie–Weiss law and Santos-Eiras equation were applied to (CCTO)0.95(Fe3O4)0.05 and (CCTO)0.9(Fe3O4)0.1 ceramics in order to investigate the nature of polarization mechanism. Furthermore, physical parameters such as static freezing temperature TVF fitted by the Vogel–Fulcher relationship, indicated the relaxor nature of these two ceramics. | en |
| dc.description.provenance | Made available in DSpace on 2021-06-13T00:09:25Z (GMT). No. of bitstreams: 1 ntu-96-P93222001-1.pdf: 6422491 bytes, checksum: 89b3f3b4e45d397574dac36510758b81 (MD5) Previous issue date: 2007 | en |
| dc.description.tableofcontents | Table of Contents
誌 謝 i 摘 要 ii Abstract iii Table of Contents iv List of Figures vi List of Tables xii Chapter 1 Introduction 1 a. Perovskite 1 b. Complex Perovskites : Classification 2 c. Complex Perovskite: CaCu3Ti4O12 3 d. Ferroelectricity 4 e. Relaxor ferroelectrics 6 Chapter 2 General Background 9 a. Complex Permittivity 9 b. The Mechanism of Polarization 11 c. Debye Equations 15 d. Arrhenius law 16 Chapter 3 Experimental Details 17 a. Sample Preparation 17 b. X-ray diffraction 18 c. Microstructure investigation 19 d. Dielectric Properties Measurement 20 Chapter 4 Experimental results and discussion 21 a. CaCu3Ti4O12 21 b. (CaCu3Ti4O12)0.99(Fe3O4)0.01 30 C. (CaCu3Ti4O12)0.95(Fe3O4)0.05 36 d. (CaCu3Ti4O12)0.9(Fe3O4)0.1 50 e. (CaCu3Ti4O12)0.8(Fe3O4)0.2 63 f. (CaCu3Ti4O12)0.7(Fe3O4)0.3 68 g. (CaCu3Ti4O12)0.6(Fe3O4)0.4 73 Chapter 5 Conclusion 78 References 81 | |
| dc.language.iso | en | |
| dc.subject | 弛緩體 | zh_TW |
| dc.subject | 高介電常數 | zh_TW |
| dc.subject | 鈣銅鈦氧 | zh_TW |
| dc.subject | relaxor | en |
| dc.subject | CaCu3Ti4O12 | en |
| dc.subject | high dielectric constant | en |
| dc.title | (CaCu3Ti4O12)1-x(Fe3O4)x氧化物介電性質之研究 | zh_TW |
| dc.title | Dielectric Properties of (CaCu3Ti4O12)1-x(Fe3O4)x | en |
| dc.type | Thesis | |
| dc.date.schoolyear | 95-2 | |
| dc.description.degree | 碩士 | |
| dc.contributor.oralexamcommittee | 陳啟東,姚永德,許仁華,郭博成 | |
| dc.subject.keyword | 高介電常數,鈣銅鈦氧,弛緩體, | zh_TW |
| dc.subject.keyword | high dielectric constant,CaCu3Ti4O12,relaxor, | en |
| dc.relation.page | 83 | |
| dc.rights.note | 有償授權 | |
| dc.date.accepted | 2007-07-30 | |
| dc.contributor.author-college | 理學院 | zh_TW |
| dc.contributor.author-dept | 物理研究所 | zh_TW |
| 顯示於系所單位： | 物理學系 | |
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