Adv. Search
Journal of Inorganic Materials

Journal of Inorganic Materials >

2009 , Vol. 24 >Issue 1: 83 - 86

DOI: https://doi.org/10.3724/SP.J.1077.2009.00083

Research Paper

Change of the Magnetic Moment and Specific Heat of La0.9Ca0.1MnO3 after Heat Treatment in Oxygen and Argon

  • WU Zi-Hua ,
  • WANG Qun ,
  • LIU Xin-Jun ,
  • YU Wei-Dong ,
  • LI Xiao-Min ,
  • CHEN Li-Dong
Expand
  • 1. State Key Laboratory of High Performance Ceramics and Superfine Microstructures Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai 200050, China; 2. School of Urban Development and Enviromental Engineeing, Shanghai Second Polytechnic University, Shanghai 201209, China

Received date: 2008-04-10

  Revised date: 2008-06-04

  Online published: 2009-01-20

Fold

Abstract

Magnetic moment and specific heat of La0.9Ca0.1MnO3 after heat treatment in oxygen and argon were studied. It is found that the sample after oxygen treatment has higher magnetic moment and specific heat than that after argon treatment. The difference of specific heat between the samples after oxygen treatment and after argon treatment has linear relationship with T3/2. The heat treatment in oxygen and argon would induce the change of oxygen density which effect the magnetic moment and specific heat. For EPIR effect, the increase of ferromagnetic regions induced by oxygen motion driven by electric pulses would increase the magnetic moment and specific heat, and the different of specific heat between low resistance state and high resistance state has linear relationship with T3/2. According to oxygen motion driven by electric pulses model, the low resistance state has higher oxygen density than high resistance state. It implies that the increase of magnetic moment and specific heat with resistance decreasing may arise from the oxygen motion driven by electric pulses for EPIR effect.


Key words： magnetic moment; specific heat; EPIR; La0.9Ca0.1MnO3

Cite this article

WU Zi-Hua , WANG Qun , LIU Xin-Jun , YU Wei-Dong , LI Xiao-Min , CHEN Li-Dong . Change of the Magnetic Moment and Specific Heat of La0.9Ca0.1MnO3 after Heat Treatment in Oxygen and Argon[J]. Journal of Inorganic Materials, 2009 , 24(1) : 83 -86 . DOI: 10.3724/SP.J.1077.2009.00083

References

［1］von Helmolt R, Wecker J, Holzapfel B, et al. Phys. Rev. Lett., 1993,71(14): 2331-2333.
［2］Jin S, Tiefel T H, McCormack M, et al. Science, 1994, 264(5157): 413-415.
［3］Coey J M D, Viret M, von Molnár S. Adv. Phys., 1999, 48(2): 167-293.［4］王世奇,连贵君,熊光成. 物理学报, 2004, 54(8): 3815-3821.
［5］Kim I, Dho J, Lee S. Phys. Rev, B, 2000, 62(9): 5674-5677.
［6］Lee J C, You D G, Le S Y, et al. J. Appl. Phys, 2002, 91(1): 221-224.［7］Liu S Q, Wu N J, Lgnatiev A. Appl. Phys. Lett., 2000, 76(19): 2749-2751.
［8］Gu R Y, Wang Z D, Ting C S. Phys. Rev. B, 2003, 70(15): 153101-4.［9］Ma L P, Pyo S, Ouyang J Y, et al. Appl. Phys. Lett., 2003, 82(9): 1419-1421.
［10］Lai Y S, Tu C H, Kwong D L. Appl. Phys. Lett., 2005, 87(12): 122101-3.
［11］Shi D X, Ba D C, Pang S J, et al. Chin. Phys., 2001, 10(11): 990-994.
［12］李培刚,雷 鸣,唐为华,等. 物理学报，2006，55(5)：2328-2332.
［13］李 倩,王之国,刘 甦,等.物理学报，2007，56(3)：1637-1642.
［14］Aoyama K, Waku K, Asanuma A, et al. Appl. Phys. Lett., 2004,85(7): 1208-1211.
［15］Odagawa A, Sato H, Inoue I H, et al. Phys. Rev. B, 2004, 70(22): 224403-4.
［16］王 群, 董 睿, 陈立东(WANG Qun, et al). 无机材料学报（Journal of Inorganic Materials）, 2004, 19(5): 1087-1092.
［17］Back I G, Lee M S, Seo S, et al. IEDM, 2004:587-590.
［18］Ghivelder L, Abrego Castillo I, N Alford McN, et al. J. Magn. Magn. Mater., 1998, 189(3): 274-282.
［19］Wu Z H, Wang Q, Yu W D, et al. J. Phys. D: Appl. Phys., 2008, 41(11): 115001-1-3.
［20］Zhang J C, Cao S X, Cao G X, et al. Phys. Rev. B, 2005, 72(5): 054410-1-6.
［21］Ahn K H, Lookman T, Bishop A R. Nature, 2004, 428(6981): 401-403.
［22］Nagaev E L. Phys. Lett. A, 1996, 218(3-6): 367-372.
［23］Tulina N A, Sirotkin V V. Physica C, 2004, 400(3-4): 105-110.
［24］Szot K, Speier W, Bihlmayer G, et al. Nature Materials, 2006, 5(4): 312-320.
［25］Baikalov A, Wang Y Q, Lorenz B, et al. Appl. Phys. Lett., 2003, 83(5): 957-959.

［26］Nian Y B, StrozierJ, Wu N J, et al. Phys. Rev. Lett., 2007, 98(14): 146403-1-4.

Options
Outlines

/

〈 〉