Phase behavior of lanthanum strontium manganites

Feng Zheng, Larry R. Pederson

Research output: Contribution to journalArticle

56 Citations (Scopus)

Abstract

The phase stability of Sr-doped LaMnO3 (LSM) perovskite in the La-Sr-Mn-O system was investigated as a function of Sr content and A/B cation ratio. The perovskite structure changed with both Sr content and A/B cation ratio. As the Sr content was increased to 0.2 mol, the perovskite structure adopted an orthorhombic distortion. This changed to a monoclinic or hexagonal structure for 0.2 ≤ Sr ≤ 0.3 mol. When the Sr content increased to 0.3 mol, the structure reverted to orthorhombic symmetry. Data from X-ray powder diffractometry, scanning electron microscopy, transmission electron microscopy, and energy-dispersive X-ray emission spectroscopy, showed that secondary phases in the La-Sr-Mn-O system were underdeveloped with respect to changes of the doped Sr content, A/B cation ratio, and thermal history. X-ray detectable minor phases present in the LSM material were Mn3O4, (La, Sr)Mn2O4, La2)3 La(OH)3, (La, Sr)3Mn2O7, and (La, Sr)2MnO4.

Original languageEnglish
Pages (from-to)2810-2816
Number of pages7
JournalJournal of the Electrochemical Society
Volume146
Issue number8
DOIs
Publication statusPublished - Aug 1999
Externally publishedYes

Fingerprint

Manganites
Lanthanum
Strontium
Phase behavior
lanthanum
strontium
Perovskite
Cations
Positive ions
X rays
Phase stability
cations
Powders
x rays
Transmission electron microscopy
Scanning electron microscopy
perovskite
histories
electron energy
transmission electron microscopy

ASJC Scopus subject areas

  • Electrochemistry
  • Surfaces, Coatings and Films
  • Surfaces and Interfaces

Cite this

Phase behavior of lanthanum strontium manganites. / Zheng, Feng; Pederson, Larry R.

In: Journal of the Electrochemical Society, Vol. 146, No. 8, 08.1999, p. 2810-2816.

Research output: Contribution to journalArticle

Zheng, Feng ; Pederson, Larry R. / Phase behavior of lanthanum strontium manganites. In: Journal of the Electrochemical Society. 1999 ; Vol. 146, No. 8. pp. 2810-2816.
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