Magnetic Structure and Transition of 15R-BaMnO3-x Studied by Resonant Soft X-ray Scattering

簡易檢索 / 詳目顯示

回結果列表

研究生：	李翊瑋 Lee, Yi-Wei
論文名稱：	Magnetic Structure and Transition of 15R-BaMnO3-x Studied by Resonant Soft X-ray Scattering 以軟X 光共振散射研究15R-BaMnO3-x之磁性結構與相變
指導教授：	黃迪靖 Huang, Di-Jing
口試委員:
學位類別：	碩士 Master
系所名稱：	理學院 - 先進光源科技學位學程 Degree Program of Science and Technology of Synchrotron Light Source
論文出版年：	2010
畢業學年度：	98
語文別：	英文
論文頁數：	79
中文關鍵詞：	磁性相變、軟X光共振散射、同步輻射、X光吸收光譜、電子結構、磁性結構、多鐵材料、過度金屬氧化物、鈣鈦礦結構
外文關鍵詞：	magnetic transition, resonant soft x-ray scattering, transition metal oxide, x-ray absorption spectrum, synchrotron, two circle diffractometer, multiferroics, spiral magnetic order
相關次數：	點閱：1 下載：0
分享至:	分享至facebook 分享至twitter

查詢本校圖書館目錄查詢臺灣博碩士論文知識加值系統勘誤回報

Competitions between magnetic interactions in the ground states are typically the
driving forces of unexpected electronic phenomena of a magnetic system. Manganese
oxides with the AMnO3 (A = La, Sr, etc.) perovskite structure are examples of these materials. They are often strongly correlated electron systems in which the interplay between spin, charge, orbital, and lattice degrees of freedom play a crucial role in determining their physical properties. Through the variation of the Mn-O-Mn bond angle and the oxidation state of Mn ions between 3+ and 4+, these manganites display various ground states, such as anti-ferromagnetic charge/orbital-ordered insulator or ferromagnetic metal.

Using resonant soft X-ray scattering, we revealed the magnetic properties of 15R-BaMnO3-x, which is expected to exhibit interesting multiferroic features. Our results of magnetic scattering provide evidence for the magnetic structure and transition of this system. Results of X-ray magnetic scattering do not depend on X-ray helicities; the magnetic structure of 15R-BaMnO3 is not spiral, unlike a spiral hexaferrite, Ba0.5Sr1.5Zn2Fe12O22.

在磁性材料中，磁性基態的交互競爭是決定電子特性的主要因素。擁有鈣鈦礦結構的錳氧化物材料AMnO3 (A = La, Sr, etc.) 就是很好的例子;這類強關聯電子材料中，電子的電荷、自旋、軌域與晶體結構強烈的交互作用，並扮演著決定這些材料物理性質的關鍵角色。舉例來說，經由錳-氧-錳的鍵結角度及錳三價與錳四價氧化態的變化，這些錳氧化物可以表現出很多不同的磁性基態，如反鐵磁、電荷有序與軌域有序的絕緣體或鐵磁的導體以及多鐵現象;所以這類材料的磁性結構是很有趣的。

為了瞭解這類材料有趣的磁性結構，我們藉由軟X光共振散射實驗，探討一個預期擁有多鐵性質的15R-BaMnO3-x之磁性性質，了解其磁性結構與磁相變。進一步，我們利用不同旋光性的共振磁散射實驗，確認15R-BaMnO3-x並不具有螺旋狀的磁性結構。

Contents
Introduction of AMnO3 and Multiferroics 6
1 Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
2 Fundamental Lattice Features in the Perovskite Manganites . . . . . 9
3 Classication of Anti-ferromagnetic Structures . . . . . . . . . . . . . 11
4 Mutiferroics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Experimental Techniques and Set-ups 20
1 Synchrotron . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
2 Soft X-ray Absorption Spectroscopy (XAS) . . . . . . . . . . . . . . . 24
2.1 Basics of soft X-ray Absorption Theory . . . . . . . . . . . . . 24
2.2 XAS of Transition-Metal Oxides . . . . . . . . . . . . . . . . . 27
3 Experiment Set-ups of XAS . . . . . . . . . . . . . . . . . . . . . . . 28
4 Resonant Soft X-Ray Scattering (RSXS) . . . . . . . . . . . . . . . . 31
4.1 Basics of X-ray Scattering . . . . . . . . . . . . . . . . . . . . 31
4.2 Resonant Soft X-ray Scattering . . . . . . . . . . . . . . . . . 33
5 Experiment Set-ups of RSXS . . . . . . . . . . . . . . . . . . . . . . . 42
Structure Characterizations of 15R-BaMnO3-x (BMO) Crystal 48
1 Introduction to BaMnO3 Series . . . . . . . . . . . . . . . . . . . . . 49
2 The Structure of 15R-BaMnO3-x . . . . . . . . . . . . . . . . . . . . 50
3 Hard X-Ray Diraction Experiment . . . . . . . . . . . . . . . . . . . 51
Magnetic Structure and Magnetic Transition of 15R-BaMnO3-x 56
1 X-Ray Absorption Spectrum of 15R-BaMnO3-x . . . . . . . . . . . . 57
1.1 Oxygen K-edge Absorption Spectrum . . . . . . . . . . . . . . 57
1.2 Manganese L-edge Absorption Spectrum . . . . . . . . . . . . 60
1.3 Barium M-edge Absorption Spectrum . . . . . . . . . . . . . 63
2 Magnetic Soft X-ray Scattering . . . . . . . . . . . . . . . . . . . . . 64
2.1 Magnetic Scattering of 15R-BaMnO3-x . . . . . . . . . . . . . 64
2.2 Soft X-ray Magnetic Scattering with pi and sigma polarization . . . 67
2.3 Temperature Dependence of Magnetic Peak . . . . . . . . . . 69
2.4 Measurements of Magnetic Structure with Right and Left Cir-cularly Polarized Light . . . . . . . . . . . . . . . . . . . . . . 74
Conclusions 78

                                

[1] J. Orenstein and A. J. Millis, Science 288, 468 (2000).
[2] J. Zaanen, G. A. Sawatzky, and J. W. Allen, Phys. Rev. Lett. 55, 418 (1985).
[3] C. Zener, Phys. Rev. 82, 403 (1951).
[4] J. Vleck, J. Chem. 7, 72 (1955).
[5] J. Goodenough, Phys. Rev. 100, 564 (1955).
[6] Y. Ito and J. Akimitsu, J. Phys. Soc. Jpn. 40, 1333 (1976).
[7] A. Millis, B. Shraiman, and R. Mueller, Phys. Rev. Lett. 77, 175 (1996).
[8] M. Kataoka and M. Tachiki, Physical B 24, 347 (1997).
[9] Zumdahl and S. S., Chemical Principles, Fifth Edition., Houghton Miin
Company, 550-551,957-964., 2005.
[10] T. Kimura et al., Nature 426, 55 (2003).
[11] G. Lawes et al., Phys. Rev. Lett. 95, 087205 (2005).
[12] T. Kimura, Annu. Rev. Mater. Res. 37, 387413 (2007).
[13] Y. Tokura, SCIENCE 312, 1481 (2006).
[14] S. W. Cheong and M. Mostovoy, Nature Material 6, 13 (2007).
[15] P. Woodward, Acta. Cryst., B53 32-43, 1997.
[16] M. Johnsson and P. Lemmens, Crystallography and Chemistry of Perovskites.
[17] W. .Bao, C. H. Chen, S. A. Carter, and S. W. Cheong, Solid state Commun.
98, 55 (1996).
[18] Anthony.R.West, Basic Solid State Chemistry, J.W.and D. Ltd,55-59,364-366,
1999.
[19] L. Nel, Annales de chimie et de physique 3, 137 (1948).
[20] T. Kimura et al., Phys. Rev. B 67, 180401 (2003).
[21] T. Katsufuji et al., Phys. Rev. B 64, 104419 (2001).
[22] B. B. V. Aken, T. T. M. Palstra, A. Filippetti, and N. A. Spaldin, Nature
Materials 3, 164 (2004).
[23] N. Hur et al., Nature 429, 392 (2005).
[24] Y. J. Choi et al., Phys. Rev. Lett. 102, 067601 (2009).
[25] I. A. Sergienko and E. Dagotto, Phys. Rev. B 73, 094434 (2006).
[26] I. A. Sergienko, C. Sen, and E. Dagotto, Phys. Rev. Lett. 97, 227204 (2006).
[27] H. Katsura, N. Nagaosa, and A. V. Balatsky, Phys. Rev. Lett. 95, 057205
(2005).
[28] C. Jia, S. Onoda, N. Nagaosa, and J. H. Han, Phys. Rev. B 74, 224444 (2006).
[29] Y. Aharonov and A. Casher, Phys. Rev. Lett. 53, 319 (1984).
[30] J. Okamoto et al., Phys. Rev. Lett. 98, 157202 (2007).
[31] M. Mostovoy, Phys. Rev. Lett. 96, 067601 (2006).
[32] http://www.nsrrc.org.tw/english/index.aspx.
[33] E.-E. Koch, editor, Handbook on synchrotron radiation, Vol 1a, chapter 2,
North-Holland, 1983.
[34] G. V. Marr, editor, Handbook on synchrotron radiation, Vol 2, chapter 1,
North-Holland, 1987.
[35] J. D. Jackson, Classical Electrodynamics, WILEY, 2001.
[36] C. T. Chen and F. Sette, Rev. Sci. Instrum. 60, 1616 (1989).
[37] C. T. Chen, Nucl. Instrum. Meth. A 256, 595 (1987).
[38] J. Als-Nielsen and D. McMorrow, Elements of Modern X-ray Physics, John
Wiley and Sons, Ltd, 2001.
[39] J. J. Sakura, Modern Quantum Mechanicss, Addospm-Wesley, 1967.
[9] M. Blume, J. Appl. Phys. 57, 3615 (1985).
[40] C. Vettier, Journal of Electron Spectroscopy and Related Phenomena 117-118,
113 128 (2001).
[41] J. P. Hannon, G. T. Trammell, M. Blume, and D. Gibbs, Phys. Rev. Lett. 61,
1245 (1988).
[42] D. J. Huang, J. Okamoto, S. W. Huang, and C. Y. Mou, Physical Society of
Japan 79, 011009 (2010).
[43] J. J. Adkin and M. A. Hayward, Chem. Mater. 19, 755 (2007).
[44] T. Negas and R. S. Roth, J. Solid State Chem. 3, 323 (1971).
[45] G.-C. J. M. et al:, Solid State Chem. 106, 99 (1993).
[46] J. Hadermann, A. M. Abakumov, J. J. Adkin, and M. A. Hayward, J. AM.
CHEM. SOC. 131, 1059810604 (2009).
[47] McKie and Duncan, Essentials of crystallography.
[48] F. M. F. de Groot et al., Phys. Rev. B 40, 57155723 (1989).
[49] J. van Elp and A. Tanaka, Phys. Rev. B 60, 53315339 (1999).
[50] A. Y. Ignatov, N. Ali, and S. Khalid, Phys. Rev. B 64, 014413 (2001).
[51] F. M. F. de Groot, J. C. Fuggle, B. T. Thole, and G. A. Sawatzky, Phys. Rev.
B 42, 54595468 (1990).
[52] F. M. F. de Groot, J. C. Fuggle, B. T. Thole, and G. A. Sawatzky, Phys. Rev.
B 41, 928937 (1990).
[53] T. Ziegler, Chem. Rev. 91, 651 (1991).
[54] B. Gilbert et al., J. Phys. Chem. A 107, 2839 (2003).
[55] K. S. Chao, Charge, Orbital, and spin Order of Transition{Metal Oxides(PhD
Theis), National Chiao Tung University, 2007.
[56] J. J. Adkin and M. A. Hayward, Chem. Mater. 19, 755 (2007).
[57] J. Okamoto et al., Phys. Rev. Lett. 98, 157202 (2007).
[58] J. M. Rondinelli, A. S. Eidelson, and N. A. Spaldin, Phys. Rev. B 79, 205119
(2009).
[59] S. W. Lovesey, E. Balcar, and Y. Tanaka, J. Phys. Condens. Matter 20, 272201
(2008).
[60] A. M. Mulders et al., Phys. Rev. B 81, 092405 (2010).
[61] T. Kaplan, unpublished (2007).
[62] D. J. Huang, Handbook of 2st APCTP workshop on multiferroics, 2010.
[63] E. Tsuji et al., J. Phys. Soc. 65, 610 (1996).
[64] T. Kimura, G. Lawes, and A. P. Ramirez, Phy. Rev. Lett. 94, 137201 (2005).
[65] J. M. Rondinelli, A. S. Eidelson, and N. A. Spaldin, Phys. Rev. B 79, 205119
(2009).
[66] D. J. Huang et al., Phys. Rev. Lett. 96 (2006).
[67] S. W. Huang et al., Phy. Rev. Lett. 101, 077205 (2008).
[68] J. J. Adkin and M. A. Hayward, Chem. Mater. 19, 755 (2007).

全文公開日期本全文未授權公開 (校內網路)
全文公開日期本全文未授權公開 (校外網路)

簡易檢索 / 詳目顯示

相關論文