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The samples (La1-xEux)4/3Sr5/3Mn2O7 (x=0, 0.15) were prepared by the traditional solid-state reaction, and their magnetic and electrical properties were investigated. The magnetzation measurement reveals that as temperature lowers, all the samples undergo a complex magnetic transition process: they transform from the two-dimensional short-range ferromagnetic order at T* into the three-dimensional long-range ferromagnetic state at TC. With the increase of Eu doping, T* and TC are both reduced, and the sample (La0.85Eu0.15)4/3Sr5/3Mn2O7 exhibits spin-glass-like behaviour in a low temperature region. Electrical property measurements show that with the increase of Eu concentration, resistivity sharply increases, the metal-insulator transition temperature decreases and the magnetoresistance peak increases. These effects are attributed to the decrease of the average ionic radius diminution and the lattice distortion due to the substitution of the smaller Eu3+ ions for La3+ ions. In addition, the small-sized Eu3+ ion preferentially occupies the R site in the rock-salt layer, then the distributions of La3+, Sr3+, Eu3+ ions in the sample (La0.85Eu0.15)4/3Sr5/3Mn2O7 should be more orderly, so there is only one peak in the ρ-T curve of the sample with x=0.15.
[1] Imada M, Fujimori A, Tokura Y 1998 Rev. Mod. Phys. 70 1039
[2] Zhao J J, Xing R, Lu Y, Haosi B Y, Zhao M Y, Jin X, Zheng L, Ning W, Sun Y, Cheng Z H 2008 Chin. Phys. B 17 2721
[3] Zhao J J, Lu Y, Haosi B Y, Xing R, Yang R F, Li Q A, Sun Y, Cheng Z H 2008 Chin. Phys. B 17 2717
[4] Wang G Y, Guo H Y, Mao Q, Yang G, Peng Z S 2010 Acta Phys. Sin. 59 8883 (in Chinese) [王桂英, 郭焕银, 毛强, 杨刚, 彭振生 2010 59 8883]
[5] Moritomo Y, Asamitsu A, Kuwahara H, Tokura Y 1996 Nature 380 141
[6] 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 57 541]
[7] Chattopadhyay S, Giri S, Majumdar S 2012 J. Appl. Phys. 112 083915
[8] Kimura T, Tomioka Y, Kuwahara H, Asamitsu A, Tamura M, Tokura Y 1996 Science 274 1698
[9] Argyriou D N, Mitchell J F, Radaelli P G, Bordallo H N, Cox D E, Medarde M, Jorgensen J D 1999 Phys. Rev. B 59 8695
[10] Yang R F, Sun Y, He W, Li Q A, Cheng Z H 2007 Appl. Phys. Lett. 90 032502
[11] Dho J H, Kim W S, Hur N H 2001 Phys. Rev. B 65 024404
[12] Zhang J, Wang F W, Zhang P L, Yan Q W 2000 Mater. Sci. Eng. B 76 6
[13] Wang A H, Liu Y, Zhang Z Y, Long Y, Cao G H 2004 Solid State Commun. 130 293
[14] Asano H, Hayakawa J, Matsui M 1997 Phys. Rev. B 56 5395
[15] Liu L, Xia Z C, Yuan S L 2006 Mater. Sci. Eng. B 127 55
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[1] Imada M, Fujimori A, Tokura Y 1998 Rev. Mod. Phys. 70 1039
[2] Zhao J J, Xing R, Lu Y, Haosi B Y, Zhao M Y, Jin X, Zheng L, Ning W, Sun Y, Cheng Z H 2008 Chin. Phys. B 17 2721
[3] Zhao J J, Lu Y, Haosi B Y, Xing R, Yang R F, Li Q A, Sun Y, Cheng Z H 2008 Chin. Phys. B 17 2717
[4] Wang G Y, Guo H Y, Mao Q, Yang G, Peng Z S 2010 Acta Phys. Sin. 59 8883 (in Chinese) [王桂英, 郭焕银, 毛强, 杨刚, 彭振生 2010 59 8883]
[5] Moritomo Y, Asamitsu A, Kuwahara H, Tokura Y 1996 Nature 380 141
[6] 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 57 541]
[7] Chattopadhyay S, Giri S, Majumdar S 2012 J. Appl. Phys. 112 083915
[8] Kimura T, Tomioka Y, Kuwahara H, Asamitsu A, Tamura M, Tokura Y 1996 Science 274 1698
[9] Argyriou D N, Mitchell J F, Radaelli P G, Bordallo H N, Cox D E, Medarde M, Jorgensen J D 1999 Phys. Rev. B 59 8695
[10] Yang R F, Sun Y, He W, Li Q A, Cheng Z H 2007 Appl. Phys. Lett. 90 032502
[11] Dho J H, Kim W S, Hur N H 2001 Phys. Rev. B 65 024404
[12] Zhang J, Wang F W, Zhang P L, Yan Q W 2000 Mater. Sci. Eng. B 76 6
[13] Wang A H, Liu Y, Zhang Z Y, Long Y, Cao G H 2004 Solid State Commun. 130 293
[14] Asano H, Hayakawa J, Matsui M 1997 Phys. Rev. B 56 5395
[15] Liu L, Xia Z C, Yuan S L 2006 Mater. Sci. Eng. B 127 55
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