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자연과학대학
화학·나노과학전공
Journal papers
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Structural and magnetic properties of the anion-deficient LaVO3-δ
Title
Structural and magnetic properties of the anion-deficient LaVO3-δ
Authors
Hur N.H.
;
Kim S.H.
;
Yu K.S.
;
Park Y.K.
;
Park J.C.
;
Kim S.J.
Ewha Authors
김성진
SCOPUS Author ID
김성진
Issue Date
1994
Journal Title
Solid State Communications
ISSN
0038-1098
Citation
Solid State Communications vol. 92, no. 6, pp. 541 - 546
Indexed
SCI; SCIE; SCOPUS
Document Type
Article
Abstract
The anion deficient LaVO3-δ (δ = 0.08) was prepared by solid state reactions using V2O3 and pre-dried La2O3 in an evacuated induction furnace. The oxygen content was estimated by thermogravimetric analysis (TGA). Rietveld profile analysis of powder X-ray diffraction data shows that this sample adopts an orthorhombically distorted perovskite structure, isostructural with GdFeO3; space group Pnma, a = 5.5509(1), b = 7.8441(2), c = 5.5513(s) A ̊. Four probe resistivity measurements indicates that LaVO3-δ is semiconducting over the experimental temperature range. The magnetic properties of LaVO3-δ are strongly dependent on the sample cooling history. LaVO3-δ undergoes a paramagnetic to antiferromagnetic transition at ca. 140 K under zero-field-cooled condition. When cooled in a magnetic field of Happl ≤ 5 kG, however, the anomalous diamagnetic behaviour is observed below ca. 140 K. These properties are discussed in terms of the structure-property relationship, and comparisons are made to the previous results on the stoichiometric LaVO3. © 1994.
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