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Polycrystalline Bi0.5Ca0.5Mn1-xCoxO3(0≤ x≤0.12) samples are synthesized by using the solid-state reaction. The effects of Co-doping on charge order of Bi0.5Ca0.5MnO3 are studied. The results show that Co doping leads to the melting of the charge order and the enhancement of the ferromagnetic correlation. For x≥0.08, the charge order transition is completely suppressed; however, there are still remaining antiferromagnetic domains inside the system. The phase separation or the coexistence of the charge order and ferromagnetic phase induced by Co-doping plays an important role in the low temperature properties for the system. Moreover, unlike in the case of rare-earth manganites, Co is more efficient to suppress charge order of Bi0.5Ca0.5MnO3 than Cr.
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Keywords:
- perovskite manganites /
- charge ordering /
- cluster glasses /
- phase separation
[1] Salamon M B, Jaime M 2001 Rev. Mod. Phys. 73 583
[2] Li X J, Wang Q 2009 Acta Phys. Sin. 58 6482 (in Chinese) [李晓娟、王 强 2009 物理学报 58 6482]
[3] Ramirez A P, Schiffer P, Cheong S W, Chen C H, Bao W, Palstra T T M, Gammel P L, Bishop D J, Zegarski B 1996 Phys. Rev. Lett. 76 3188
[4] Gao H P, Li B, Yu Y, Ruan K Q, Wu B M 2004 Acta Phys. Sin. 53 3853 (in Chinese)[高惠平、李 波、余 勇、阮可青、吴柏枚 2004 物理学报 53 3853]
[5] García-Muoz J L, Frontera C, Respaud M, Giot M, Ritter C, Capdevila X G 2005 Phys. Rev. B 72 054432
[6] Kirste A, Goiran M, Respaud M, Vanaken J, Broto J M, Rakoto H, von Ortenberg M, Frontera C, García-Muoz J L 2003 Phys. Rev. B 67 134413
[7] García-Muoz J L, Frontera C, Aranda M A G, Llobet A, Ritter C 2001 Phys. Rev. B 63 064415
[8] Machida A, Moritomo Y, Ohoyama K, Katsufuji T, Nakamura A 2002 Phys. Rev. B 65 064435
[9] Guo H Y, Liu N, Cai Z R, Zhang Y H 2006 Acta Phys. Sin. 55 865 (in Chinese)[郭焕银、刘 宁、蔡之让、张裕恒 2006 物理学报 55 865]
[10] Xiong C M, Sun J R, Li R W, Zhang S Y, Zhao T Y, Shen B G 2004 J. Appl. Phys. 95 1336
[11] Bao W, Axe J D, Chen C H, Cheong S W 1997 Phys. Rev. Lett. 78 543
[12] Woo H, Tyson T A, Croft M, Cheong S W, Woicik J C 2001 Phys. Rev. B 63 134412
[13] Zheng G H, Sun Y P, Zhu X B, Song W H 2006 Solid State Commun. 137 326
[14] Binder K, Young A P 1986 Rev. Mod. Phys. 58 801
[15] Tzankov D, Kovacheva D, Krezhov K, Pu Dz＇ niak R, Wi Ds＇ niewski A, Sváb E, Mikhov M 2005 J. Phys.: Condens. Matter. 17 4319
[16] Zhao J J, Xing R, Lu Y, Haosibayar, Zhao M Y, Jin X, Zheng L, Ning W, Sun Y, Cheng Z H 2008 Chin. Phys. B 17 2021
[17] Dho J , Kim W S, Hur N H 2002 Phys. Rev. Lett. 89 027202
[18] Yu Q Y, Zhang J C, Jia R R, Jing C, Cao S X 2008 Acta Phys. Sin. 57 453 (in Chinese) [於乾英、张金仓、贾蓉蓉、敬 超、曹世勋 2008 物理学报 57 453]
[19] Li X J, Wang Q 2009 Physica B 404 3703
[20] Volkov N, Petrakovskii G, Patrin K, Sablina K, Eremin E, Vasiliev V, Vasiliev A, Molokeev M, Bni P, Clementyev E 2006 Phys. Rev. B 73 104401
[21] Lu W J, Sun Y P, Zhu X B, Song W H, Du J J 2006 Solid State Commun. 138 200
[22] Barnabé A, Maignan A, Hervieu M, Damay F, Martin C, Raveau B 1997 Appl. Phys. Lett. 71 3907
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[1] Salamon M B, Jaime M 2001 Rev. Mod. Phys. 73 583
[2] Li X J, Wang Q 2009 Acta Phys. Sin. 58 6482 (in Chinese) [李晓娟、王 强 2009 物理学报 58 6482]
[3] Ramirez A P, Schiffer P, Cheong S W, Chen C H, Bao W, Palstra T T M, Gammel P L, Bishop D J, Zegarski B 1996 Phys. Rev. Lett. 76 3188
[4] Gao H P, Li B, Yu Y, Ruan K Q, Wu B M 2004 Acta Phys. Sin. 53 3853 (in Chinese)[高惠平、李 波、余 勇、阮可青、吴柏枚 2004 物理学报 53 3853]
[5] García-Muoz J L, Frontera C, Respaud M, Giot M, Ritter C, Capdevila X G 2005 Phys. Rev. B 72 054432
[6] Kirste A, Goiran M, Respaud M, Vanaken J, Broto J M, Rakoto H, von Ortenberg M, Frontera C, García-Muoz J L 2003 Phys. Rev. B 67 134413
[7] García-Muoz J L, Frontera C, Aranda M A G, Llobet A, Ritter C 2001 Phys. Rev. B 63 064415
[8] Machida A, Moritomo Y, Ohoyama K, Katsufuji T, Nakamura A 2002 Phys. Rev. B 65 064435
[9] Guo H Y, Liu N, Cai Z R, Zhang Y H 2006 Acta Phys. Sin. 55 865 (in Chinese)[郭焕银、刘 宁、蔡之让、张裕恒 2006 物理学报 55 865]
[10] Xiong C M, Sun J R, Li R W, Zhang S Y, Zhao T Y, Shen B G 2004 J. Appl. Phys. 95 1336
[11] Bao W, Axe J D, Chen C H, Cheong S W 1997 Phys. Rev. Lett. 78 543
[12] Woo H, Tyson T A, Croft M, Cheong S W, Woicik J C 2001 Phys. Rev. B 63 134412
[13] Zheng G H, Sun Y P, Zhu X B, Song W H 2006 Solid State Commun. 137 326
[14] Binder K, Young A P 1986 Rev. Mod. Phys. 58 801
[15] Tzankov D, Kovacheva D, Krezhov K, Pu Dz＇ niak R, Wi Ds＇ niewski A, Sváb E, Mikhov M 2005 J. Phys.: Condens. Matter. 17 4319
[16] Zhao J J, Xing R, Lu Y, Haosibayar, Zhao M Y, Jin X, Zheng L, Ning W, Sun Y, Cheng Z H 2008 Chin. Phys. B 17 2021
[17] Dho J , Kim W S, Hur N H 2002 Phys. Rev. Lett. 89 027202
[18] Yu Q Y, Zhang J C, Jia R R, Jing C, Cao S X 2008 Acta Phys. Sin. 57 453 (in Chinese) [於乾英、张金仓、贾蓉蓉、敬 超、曹世勋 2008 物理学报 57 453]
[19] Li X J, Wang Q 2009 Physica B 404 3703
[20] Volkov N, Petrakovskii G, Patrin K, Sablina K, Eremin E, Vasiliev V, Vasiliev A, Molokeev M, Bni P, Clementyev E 2006 Phys. Rev. B 73 104401
[21] Lu W J, Sun Y P, Zhu X B, Song W H, Du J J 2006 Solid State Commun. 138 200
[22] Barnabé A, Maignan A, Hervieu M, Damay F, Martin C, Raveau B 1997 Appl. Phys. Lett. 71 3907
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