? DONG R, WANG Q, CHEN L D, et al. Retention behavior of the electric- pulse-induced reversible resistance change effect in Ag-La0.7Ca0.3? MnO3-Pt sandwiches [J]. Appl Phys Lett, 2005, 86(17): 172107(1–3).
[2]
YANG Jun, YUN Yuehou, LI Guodong. Chin Rare Earths, 2010, 31(3): 67–70.
FU Xia, CHEN Yang, YU Gaoqi, et al. J Chin Rare Earth Soc, 2011, 29(1): 49–54. ? ZENER C. Interaction between the d-shells in the transition metals.ⅡFerromagnetic compounds of manganese with perovskite structure [J]. Phys Rev, 1951, 82(3): 403–405.
LEI Liwen, FU Zhengyi, ZHANG Jinyong, et al. J Chin Ceram Soc, 2006, 34(2): 158–161.
[13]
? VON HELMOLT R, WECKER J, HOLZAPFEL B, et al. Giant negative magnetoresistance in perovskitelike La2/3Ba1/3MnOx ferromagnetic films [J]. Phys Rev Lett, 1993, 71(14): 2331–2333.
[14]
? RAMIREZ A P. Colossal magnetoresistance [J]. J Phys Condens Matter, 1997(39), 9: 8171–8199.
? DEBNATH J C, ZENG R, KIM J H, et al. Giant magnetic entropy change in colossal magnetoresistance in La0.7Ca0.3MnO3 material in low field [J]. J Appl Phys, 2010, 107(9): 09A916(1–3).
LI Aijun, SI Haifeng, ZHOU Zhanrong, et al. Metall Funct Mater, 2008, 15(3): 25–28.
[20]
? SALVA H R, GHILARDUCCI A A, SáNCHEZ R D, et al. Magnetic held dependence of elastic modulus and resistance in La2/3Ca1/3MnO3 [J]. J Alloys Compd, 2000, 310(1/2): 44–46.
WANG Weipeng, YANG Hua, XIAN Tao, et al. Chin J Inorg Chem, 2011, 27(6): 1071–1076.
[33]
? DOUY A, ODIER P. The polyacrylamide gel: a novel route to ceramic and glassy oxide powders [J]. Mater Res Bull, 1989, 24(9): 1119–1126.
[34]
? SIN A, ODIER P. Gelation by acrylamide, a quasi-universal medium for the synthesis of fine oxide powders for electroceramic applications [J]. Adv Mater, 2000, 12(9): 649–652.
[35]
? DEY P, NATH T K. Effect of grain size modulation on the magneto- and electronic-transport properties of La0.7Ca0.3MnO3 nanoparticles: The role of spin-polarized tunneling at the enhanced grain surface [J]. Phys Rev B, 2006, 73(21): 214425(1–14).