Hostname: page-component-8448b6f56d-gtxcr Total loading time: 0 Render date: 2024-04-24T14:15:08.330Z Has data issue: false hasContentIssue false
  • English
  • Français

Abnormal Lattice Expansion and Double Periodicity in La0.7Sr0.3MnO3 Thin Films Under Electron Irradiation

Published online by Cambridge University Press:  01 July 2005

M. Zhang ,
X.L. Ma ,
D.X. Li ,
H.B. Lu ,
Z.H. Chen  and
G.Z. Yang
M. Zhang
Affiliation:
Shenyang National Laboratory for Materials Science, Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110016, People’s Republic of China
X.L. Ma*
Affiliation:
Shenyang National Laboratory for Materials Science, Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110016, People’s Republic of China
D.X. Li
Affiliation:
Shenyang National Laboratory for Materials Science, Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110016, People’s Republic of China
H.B. Lu
Affiliation:
Laboratory of Optical Physics, Institute of Physics & Center for Condensed Matter Physics, Chinese Academy of Sciences, Beijing 100080, People’s Republic of China
Z.H. Chen
Affiliation:
Laboratory of Optical Physics, Institute of Physics & Center for Condensed Matter Physics, Chinese Academy of Sciences, Beijing 100080, People’s Republic of China
G.Z. Yang
Affiliation:
Laboratory of Optical Physics, Institute of Physics & Center for Condensed Matter Physics, Chinese Academy of Sciences, Beijing 100080, People’s Republic of China
*
a)Address all correspondence to this author. e-mail: xlma@imr.ac.cn
Get access

Abstract

Perovskite-based SrNb0.2Ti0.8O3/La0.7Sr0.3MnO3 bilayer films were grown on (001) SrTiO3 substrate. By means of in situ transmission electron microscopy, lattice expansion and double periodicity were identified in both plan-view and cross-section La0.7Sr0.3MnO3 films under electron irradiation for 25 s. After the electron beam was removed from specimens, the original perovskite structure recovered within 10 min. However, when irradiation time was more than 1 min, the original perovskite structure could not recover and became an amorphous phase or a cavity created by irradiation. According to first-principle calculation and electron diffraction pattern simulation, formation mechanism of the lattice expansion and double periodicity is proposed based on oxygen deficiency during electron irradiation.

Keywords

MicrostructureTransmission electron microscopy (TEM)
Type
Articles
Information
Journal of Materials Research , Volume 20 , Issue 7 , July 2005 , pp. 1778 - 1784
Copyright
Copyright © Materials Research Society 2005

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

References

REFERENCES

1Coey, J.M.D. and Viret, M.: Mixed-valence manganites. Adv. Phys. 48, 167 (1999).CrossRefGoogle Scholar
2Ramirez, A.P.: Colossal magnetoresistance. J. Phys. Condens. Matter. 9, 8171 (1997).CrossRefGoogle Scholar
3Von Helmolt, R., Wecker, J., Holzapfel, B., Schultz, L. and Samwer, K.: Giant negative magnetoresistance in perovskite La2/3Ba1/3MnO x ferromagnetic-films. Phys. Rev. Lett. 71, 2331 (1993).CrossRefGoogle Scholar
4Jin, S., Tiefel, T.H., McCormack, M., Fastnacht, P.A., Ramesh, R. and Chen, L.H.: Thousandfold change in resistivity in magnetoresistive La–Ca–Mn–O films. Science 264, 413 (1994).CrossRefGoogle ScholarPubMed
5Minh, N.Q.: Ceramic fuel cells. J. Am. Ceram. Soc. 76, 563 (1993).CrossRefGoogle Scholar
6Ormerod, R.M.: Solid oxide fuel cells. Chem. Soc. Rev. 32, 17 (2003).CrossRefGoogle ScholarPubMed
7Cherry, M., Islam, M.S. and Catlow, C.R.A.: Oxygen-ion migration in perovskite-type oxides. J. Solid State Chem. 118, 125 (1995).CrossRefGoogle Scholar
8Islam, M.S., Cherry, M. and Catlow, C.R.A.: Oxygen diffusion in LaMnO3 and LaCoO3 perovskite-type oxides: A molecular dynamics study. J. Solid State Chem. 124, 230 (1996).CrossRefGoogle Scholar
9Buseck, P., Cowley, J.M. and Eyring, L.: High-resolution Transmission Electron Microscopy and Associated Techniques, 1st ed. (Oxford University Press, ;Oxford, U.K., 1992), p. 509.Google Scholar
10Su, D.S.: Electron beam induced changes in transition metal oxides. Anal. Bioanal. Chem. 374, 732 (2002).Google ScholarPubMed
11Garvie, L.A.J. and Craven, A.J.: Electron-beam-induced reduction of Mn4+ in manganese oxides as revealed by parallel EELS. Ultramicroscopy 54, 83 (1994).CrossRefGoogle Scholar
12Liu, Z.Q., Hashimoto, H., Sukedai, E., Song, M., Mitsuishi, K. and Furuya, K.: In situ observation of the formation of Fe3O4 in Fe4N (001) due to electron irradiation. Phys. Rev. Lett. 90, 255504 (2003).CrossRefGoogle ScholarPubMed
13Zhan, Q., Yu, R., He, L.L., Li, D.X., Li, J., Xu, S.Y. and Ong, C.K.: Reversible structural transition in epitaxial manganite film. Phys. Rev. Lett. 88, 196014 (2002).CrossRefGoogle ScholarPubMed
14Zhang, M., Ma, X.L., Li, D.X., Lu, H.B., Chen, Z.H. and Yang, G.Z.: Microdomains in thin films of rhombohedral La0.7Sr0.3MnO3. Phys. Status Solidi A 196, 365 (2003).CrossRefGoogle Scholar
15Payne, M.C., Teter, M.P., Allan, D.C., Arias, T.A. and Joannopoulos, J.D.: Iterative minimization techniques for abinitio total-energy calculations-molecular-dynamics and conjugate gradients. Rev. Mod. Phys. 64, 1045 (1992).CrossRefGoogle Scholar
16Hohenberg, P. and Kohn, W.: Inhomogeneous electron gas. Phys. Rev. B 136, 864 (1964).CrossRefGoogle Scholar
17Perdew, J.P., Chevary, J.A., Vosko, S.H., Jackson, K.A., Pederson, M.R., Singh, D.J. and Fiolhais, C.: Atoms, molecules, solids, and surfaces: Applications of the generalized gradient approximation for exchange and correlation. Phys. Rev. B 46, 6671 (1992).CrossRefGoogle ScholarPubMed
18Vanderbilt, D.: Soft self-consistent pseudopotentials in a generalized eigenvalue formalism. Phys. Rev. B 41, 7892 (1990).CrossRefGoogle Scholar
19Fischer, T.H. and Almlof, J.: General-methods for geometry and wave-function optimization. J. Phys. Chem. 96, 9768 (1992).CrossRefGoogle Scholar