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High-temperature cr...
High-temperature crystal structure and transport properties of the layered cuprates Ln(2)CuO(4), Ln=Pr, Nd and Sm
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Kaluzhskikh, M. S. (author)
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Kazakov, S. M. (author)
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Mazo, G. N. (author)
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Istomin, S. Ya. (author)
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Antipov, E. V. (author)
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Gippius, A. A. (author)
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Fedotov, Yu. (author)
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Bredikhin, S. I. (author)
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- Liu, Yi (author)
- Stockholms universitet,Institutionen för material- och miljökemi (MMK)
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- Svensson, Gunnar (author)
- Stockholms universitet,Institutionen för material- och miljökemi (MMK)
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- Shen, Zhijian (author)
- Stockholms universitet,Institutionen för material- och miljökemi (MMK)
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(creator_code:org_t)
- Elsevier BV, 2011
- 2011
- English.
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In: Journal of Solid State Chemistry. - : Elsevier BV. - 0022-4596 .- 1095-726X. ; 184:3, s. 698-704
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Abstract
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- High-temperature crystal structure of the layered cuprates Ln(2)CuO(4), Ln = Pr, Nd and Sm with tetragonal T'-structure was refined using X-ray powder diffraction data. Substantial anisotropy of the thermal expansion behavior was observed in their crystal structures with thermal expansion coefficients (TEC) along a- and c-axis changing from TEC(a)/TEC(c)approximate to 1.37 (Pr) to 0.89 (Nd) and 0.72 (Sm). Temperature dependence of the interatomic distances in Ln(2)CuO(4) shows significantly lower expansion rate of the chemical bond between Pr and oxygen atoms (O1) belonging to CuO(2)-planes (TEC(Pr-O1)= 11.7 ppm K(-1)) in comparison with other cuprates: TEC (Nd-O1)=15.2 ppm K(-1) and TEC (Sm-O1)= 15.1 ppm K(-1). High-temperature electrical conductivity of Pr(2)CuO(4) is the highest one in the whole studied temperature range (298-1173 K): 0.1-108 S/cm for Pr(2)CuO(4), 0.07-23 S/cm for Nd(2)CuO(4) and 2 X 10(-4)-9 S/cm for Sm(2)CuO(4). The trace diffusion coefficient (D(T)) of oxygen for Pr(2)CuO(4) determined by isotopic exchange depth profile (IEDP) technique using secondary ion mass spectrometry (SIMS) varies in the range 7.2 X 10(-13) Cm(2)/S (973 K) and 3.8 X 10(-10) Cm(2)/S (1173 K) which are in between those observed for the manganese and cobalt-based perovskites.
Subject headings
- NATURVETENSKAP -- Kemi (hsv//swe)
- NATURAL SCIENCES -- Chemical Sciences (hsv//eng)
Keyword
- High-temperature crystal structure
- High-temperature conductivity
- Cuprates
- Oxygen diffusion
- SIMS
Publication and Content Type
- ref (subject category)
- art (subject category)
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- By the author/editor
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Kaluzhskikh, M. ...
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Kazakov, S. M.
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Mazo, G. N.
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Istomin, S. Ya.
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Antipov, E. V.
-
Gippius, A. A.
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show more...
-
Fedotov, Yu.
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Bredikhin, S. I.
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Liu, Yi
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Svensson, Gunnar
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Shen, Zhijian
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show less...
- About the subject
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- NATURAL SCIENCES
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NATURAL SCIENCES
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and Chemical Science ...
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Journal of Solid ...
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Stockholm University