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La1-xGdx)4/3Sr5/3Mn2 O7 (x=0, 0.05) polycrystalline samples have been prepared by solid state reaction method, and the phase separation phenomena in this samples are investigated by measuring the magnetization-temperature (M-T) curve, electron spin resonance (ESR) curve and resistivity-temperature (-T) curve. For both samples, experimental results suggest there exists competition between ferromagnetic and antiferromagnetic interactions in low temperature range, which reflects a characteristic of cluster spin glass. A Griffiths-like phase is observed in temperature ranges 125375 K and 100375 K for x=0 sample and x=0.05 sample, respectively. It is found that doping contributes to the decrease of three-dimensional long-range ferromagnetic ordering temperature (from Tc03D 125 K for x=0 to Tc13D 100 K for x=0.05), but has no obvious effect on the Griffiths-like temperature (TG 375 K). Above TG 375 K, a pure paramagnetic phase appears in both samples. The -T curves reveal two insulator-metal transitions in the entire temperature range for x=0 sample, which is caused by coexistence of the two phases in perovskite manganese oxides. For x=0.05 sample, however, there exhibits a single insulator-metal transition, indicating that doping can hinder the coexistence phenomenon. It can be seen from the fitted -T curves that the electron conduction mechanism in high temperature range is in accordance with the three-dimensional variable range of hopping conduction.
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Keywords:
- bilayered perovskite /
- phase separation /
- Griffiths-like phase
[1] Zhou M, Wu H Y, Wang H J, Zheng L, Zhao J J, Xing R, Lu Y 2012 Physica B 407 2219
[2] [3] Zhao X, Chen W, Zong Y, Diao S L, Yan X J, Zhu M G 2009 J. Alloys. Compd. 469 61
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[19] Yang R F, Sun Y, Di N L, Li Q A, Cheng Z H 2007 J. Magn. Magn. Mater. 309 149
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[23] Zheng L, Lu Y, Zhao J J, Zhang X Q, Xing R, Wu H Y, Jin X, Zhou M, Cheng Z H 2010 Chin. Phys. B 19 127501
[24] [25] [26] Liu L, Zhang L J, Niu L Y, Liu S, Xia Z C, Yuan S L 2005 Mater. Sci. Eng. B 117 227
[27] Liu L, Xia Z C, Yuan S L 2006 Mater. Sci. Eng. B 127 55
[28] [29] [30] Chattopadhyay S, Giri S, Majumdar S 2012 J. Appl. Phys. 112 083915
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[34] [35] Deisenhofer J, Braak D, Krug von Nidda H A, Hemberger J, Eremina R M, Lvanshin V A, Balbashov A M, Jug G, Loidl A, Kimura T, Tokura Y 2005 Phys. Rev. Lett. 95 257202
[36] [37] Zhou S M, Li Y, Guo Y Q, Zhao J Y, Cai X, Shi L 2013 J. Appl. Phys. 114 163903
[38] [39] [40] Solin N I, Korolyov A V, Medvedev Yu V, Nikolaenko Yu M, Khokhlov V A, Prokhorov A Yu, Levchenko G G 2013 J. Magn. Magn. Mater. 334 74
[41] Yang R F, Sun Y, He W, Li Q A, Cheng Z H 2007 Appl. Phys. Lett. 90 032502
[42] [43] Liu L 2005 Ph. D. Dissertation (Wuhan: Huazhong University of Science and Technology) (in Chinese) [刘莉2005博士学位论文(武汉: 华中科技大学)]
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[1] Zhou M, Wu H Y, Wang H J, Zheng L, Zhao J J, Xing R, Lu Y 2012 Physica B 407 2219
[2] [3] Zhao X, Chen W, Zong Y, Diao S L, Yan X J, Zhu M G 2009 J. Alloys. Compd. 469 61
[4] [5] Zheng L, Zhou M, Zhao J J, Cheng Z H, Zhang X Q, Xing R, Zhang X F, LU Y 2011 Chin. Phys. B 20 087501
[6] [7] [8] Han L A, Chen C L, Dong H Y, Wang J Y, Gao G M, Luo B C 2008 Acta. Phys. Sin. 57 541 (in Chinese) [韩立安, 陈长乐, 董慧迎, 王建元, 高国棉, 罗炳成 2008 物理学报 57 541]
[9] Zhang J, Yan Q W, Wang F W, Yuan P, Zhang P L 1999 Acta. Phys. Sin. 48 68 (in Chinese) [张军, 严启伟, 王芳卫, 袁鹏, 张泮霖 1999 物理学报 48 68]
[10] [11] Deng H, Yang C P, Huang C, Xu L F 2010 Acta. Phys. Sin. 59 7390 (in Chinese) [邓恒, 杨昌平, 黄昌, 徐玲芳 2010 物理学报 59 7390]
[12] [13] [14] Nagaev E L 1994 Phys. Stat. Sol. (b) 186 9
[15] Teresa J M De, Ibarra M R, Algarable P A, Ritter C, Marquina C, Blasco J, Garcia J, Del Moral A, Arnold Z 1997 Nature 386 256
[16] [17] [18] Goodenough J B, Zhou J S 1997 Nature 386 229
[19] Yang R F, Sun Y, Di N L, Li Q A, Cheng Z H 2007 J. Magn. Magn. Mater. 309 149
[20] [21] [22] Wang A H, Liu Y, Zhang Z Y, Long Y, Cao G H 2004 Solid. State. Commun. 130 293
[23] Zheng L, Lu Y, Zhao J J, Zhang X Q, Xing R, Wu H Y, Jin X, Zhou M, Cheng Z H 2010 Chin. Phys. B 19 127501
[24] [25] [26] Liu L, Zhang L J, Niu L Y, Liu S, Xia Z C, Yuan S L 2005 Mater. Sci. Eng. B 117 227
[27] Liu L, Xia Z C, Yuan S L 2006 Mater. Sci. Eng. B 127 55
[28] [29] [30] Chattopadhyay S, Giri S, Majumdar S 2012 J. Appl. Phys. 112 083915
[31] Mitchell J F, Argyriou D N, Jorgensen J D, Hinks D G, Potter C D, Bader S D 1997 Phys. Rev. B 55 63
[32] [33] MacChesney J B, Potter J F, Sherwood R C 1969 J. Appl. Phys. 40 1243
[34] [35] Deisenhofer J, Braak D, Krug von Nidda H A, Hemberger J, Eremina R M, Lvanshin V A, Balbashov A M, Jug G, Loidl A, Kimura T, Tokura Y 2005 Phys. Rev. Lett. 95 257202
[36] [37] Zhou S M, Li Y, Guo Y Q, Zhao J Y, Cai X, Shi L 2013 J. Appl. Phys. 114 163903
[38] [39] [40] Solin N I, Korolyov A V, Medvedev Yu V, Nikolaenko Yu M, Khokhlov V A, Prokhorov A Yu, Levchenko G G 2013 J. Magn. Magn. Mater. 334 74
[41] Yang R F, Sun Y, He W, Li Q A, Cheng Z H 2007 Appl. Phys. Lett. 90 032502
[42] [43] Liu L 2005 Ph. D. Dissertation (Wuhan: Huazhong University of Science and Technology) (in Chinese) [刘莉2005博士学位论文(武汉: 华中科技大学)]
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