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The temperature-dependent spatial structure of perovskite oxide La0.55Ca0.45MnO3 has been checked by X-ray diffraction (XRD) and Rietveld method was employed to refine the XRD data. It was found that with the decrease of temperature, almost all of the diffraction peaks were split; each peak was divided from single peak at high temperature into two peaks at low temperature, indicating the appearance of a crystalline structural phase transition. Corresponding to the structural phase transition, magnetization measurements also revealed a magnetic transition from ferromagnetism to antiferromagnetism. With the Rietica analysis of the XRD data of the compound, plots of the electronic density distribution of La0.55Ca0.45MnO3 were made. Sharp difference in the distributions above and below the transition temperature was clearly shown. Taking the magnetism of the compound into consideration, the structural phase transition was analyzed and the sharp difference of the electronic density distribution was qualitatively explained.
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Keywords:
- manganites /
- phase transition /
- electronic density /
- magnetic structure
[1] Salamon M B, Jaime M 2001 Rev. Mod. Phys. 73 583
[2] Wollan E O, Koehler W C 1955 Phys. Rev. 100 545
[3] Zener C 1951 Phys. Rev. 82 403
[4] Beyreuther E, Thiessen A, Grafstrom S, Eng L M, Dekker M C, Dörr K 2009 Phys. Rev. B 80 075106
[5] Takubo N, Onishi I, Takubo K, Mizokawa T, Miyano K 2008 Phys. Rev. Lett. 101 177403
[6] Dagotto Elbio 2005 New J. Phys. 7 67
[7] Li X J,Wang Q 2009 Acta Phys. Sin. 58 6482 (in Chinese) [李晓娟、王 强 2009 58 6482]
[8] Dong S, Yu R, Yunoki Seiji, Liu J M, Dagotto Elbio 2008 Phys. Rev. B 78 155121
[9] Chen C H, Cheong S W 1996 Phys. Rev. Lett. 76 4042
[10] Tokura Y 2006 Rep. Prog. Phys. 69 797
[11] Tokura Y, Nagaosa N 2000 Science 288 462
[12] Lu H B, Dai S Y, Chen Z H, Yan L, Zhou Y L, Yang G Z 2003 Chin. Sci. Bull. 48 1016(in Chinese) [吕惠宾、 戴守愚、 陈正豪、 颜 雷、 周岳亮、 杨国桢 2003科学通报 48 1016] [13] Sun J R, Zhang S Y, Shen B G., Wong H K 2005 Appl. Phys. Lett. 86 053503
[13] Tang W H, Li P G, Li L H, Gao J 2005 Acta Phys. Sin. 54 291 (in Chinese) [唐为华、 李培刚、 Li L H、 Gao J 2005 54 291]
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[1] Salamon M B, Jaime M 2001 Rev. Mod. Phys. 73 583
[2] Wollan E O, Koehler W C 1955 Phys. Rev. 100 545
[3] Zener C 1951 Phys. Rev. 82 403
[4] Beyreuther E, Thiessen A, Grafstrom S, Eng L M, Dekker M C, Dörr K 2009 Phys. Rev. B 80 075106
[5] Takubo N, Onishi I, Takubo K, Mizokawa T, Miyano K 2008 Phys. Rev. Lett. 101 177403
[6] Dagotto Elbio 2005 New J. Phys. 7 67
[7] Li X J,Wang Q 2009 Acta Phys. Sin. 58 6482 (in Chinese) [李晓娟、王 强 2009 58 6482]
[8] Dong S, Yu R, Yunoki Seiji, Liu J M, Dagotto Elbio 2008 Phys. Rev. B 78 155121
[9] Chen C H, Cheong S W 1996 Phys. Rev. Lett. 76 4042
[10] Tokura Y 2006 Rep. Prog. Phys. 69 797
[11] Tokura Y, Nagaosa N 2000 Science 288 462
[12] Lu H B, Dai S Y, Chen Z H, Yan L, Zhou Y L, Yang G Z 2003 Chin. Sci. Bull. 48 1016(in Chinese) [吕惠宾、 戴守愚、 陈正豪、 颜 雷、 周岳亮、 杨国桢 2003科学通报 48 1016] [13] Sun J R, Zhang S Y, Shen B G., Wong H K 2005 Appl. Phys. Lett. 86 053503
[13] Tang W H, Li P G, Li L H, Gao J 2005 Acta Phys. Sin. 54 291 (in Chinese) [唐为华、 李培刚、 Li L H、 Gao J 2005 54 291]
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