Enhanced ferromagnetism and conductivity in epitaxial LaMnO3 thin films by oxygen-atmosphere annealing

被引：17
作者：
Sun, Qinchao [1 ]
Luo, Xin [1 ]
Xia, Qingtao [1 ]
Guo, Yunfeng [1 ]
Su, Jie [1 ]
Li, Qiang [1 ]
Miao, Guoxing [1 ,2 ]
机构：
[1] Qingdao Univ, Coll Phys Sci, Sch Elect & Informat Engn, Qingdao 266071, Peoples R China
[2] Univ Waterloo, Dept Elect & Comp Engn, Waterloo, ON N2L 3G1, Canada
来源：
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS | 2020年 / 499卷
基金：
中国国家自然科学基金; 美国国家科学基金会;
关键词：
Magnetic oxide films; Magnetism; Jahn-Teller distortion; Laser molecular beam epitaxy; CRUCIAL ROLE; VACANCIES; EVOLUTION;
D O I：
10.1016/j.jmmm.2019.166317
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
We have investigated the effect of the excess oxygen on the structural, magnetic, and transport properties in LaMnO3 thin films by post-annealing in the oxygen atmosphere. The ferromagnetism and conductivity of the LaMnO3 films are greatly enhanced after post-annealing. The valence states of Mn ions are trivalent in the asgrown film and become trivalent and tetravalent mixed in the annealed film. Jahn-Teller interaction is suppressed due to a reduction of MnO6 distortion, confirmed by Raman spectra. The conversion from Mn3+ to Mn4+ and suppression of the Jahn-Teller interaction are responsible for the enhancement of ferromagnetism and conductivity in annealed films.
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页数：5
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共 41 条
  • [1] Emergent nanoscale superparamagnetism at oxide interfaces
    Anahory, Y.
    Embon, L.
    Li, C. J.
    Banerjee, S.
    Meltzer, A.
    Naren, H. R.
    Yakovenko, A.
    Cuppens, J.
    Myasoedov, Y.
    Rappaport, M. L.
    Huber, M. E.
    Michaeli, K.
    Venkatesan, T.
    Ariando
    Zeldov, E.
    [J]. NATURE COMMUNICATIONS, 2016, 7
  • [2] [Anonymous], [No title captured]
  • [3] Preparation and characterization of LaMnO3 thin films grown by pulsed laser deposition
    Aruta, C.
    Angeloni, M.
    Balestrino, G.
    Boggio, N. G.
    Medaglia, P. G.
    Tebano, A.
    Davidson, B.
    Baldini, M.
    Di Castro, D.
    Postorino, P.
    Dore, P.
    Sidorenko, A.
    Allodi, G.
    De Renzi, R.
    [J]. JOURNAL OF APPLIED PHYSICS, 2006, 100 (02)
  • [4] Metabolic networks of microbial systems
    Bhattacharya, Sumana
    Chakrabarti, Subhra
    Nayak, Amiya
    Bhattacharya, Sanjoy K.
    [J]. MICROBIAL CELL FACTORIES, 2003, 2 (1)
  • [5] Orbital order and possible superconductivity in LaNiO3/LaMO3 superlattices
    Chaloupka, Jiri
    Khaliullin, Giniyat
    [J]. PHYSICAL REVIEW LETTERS, 2008, 100 (01)
  • [6] Effects of oxygen-reducing atmosphere annealing on LaMnO3 epitaxial thin films
    Choi, W. S.
    Marton, Z.
    Jang, S. Y.
    Moon, S. J.
    Jeon, B. C.
    Shin, J. H.
    Seo, S. S. A.
    Noh, T. W.
    Myung-Whun, K.
    Lee, H. N.
    Lee, Y. S.
    [J]. JOURNAL OF PHYSICS D-APPLIED PHYSICS, 2009, 42 (16)
  • [7] 2D Electron Gas with 100% Spin-Polarization in the (LaMnO3)2/(SrTiO3)2 Superlattice under Uniaxial Strain
    Cossu, F.
    Jilili, J.
    Schwingenschloegl, U.
    [J]. ADVANCED MATERIALS INTERFACES, 2014, 1 (08):
  • [8] Colossal magnetoresistant materials: The key role of phase separation
    Dagotto, E
    Hotta, T
    Moreo, A
    [J]. PHYSICS REPORTS-REVIEW SECTION OF PHYSICS LETTERS, 2001, 344 (1-3): : 1 - 153
  • [9] Magnetism, conductivity, and orbital order in (LaMnO3)2n/(SrMnO3)n superlattices
    Dong, Shuai
    Yu, Rong
    Yunoki, Seiji
    Alvarez, Gonzalo
    Liu, J. -M.
    Dagotto, Elbio
    [J]. PHYSICAL REVIEW B, 2008, 78 (20):
  • [10] Signature of Jahn-Teller distortion and oxygen stoichiometry in Raman spectra of epitaxial LaMnO3+δ thin films
    Dubey, Aditi
    Sathe, V. G.
    Rawat, R.
    [J]. JOURNAL OF APPLIED PHYSICS, 2008, 104 (11)
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