Structure and properties of (La2-xSrx)MnO4 compounds

M. S. Wu, H. C.I. Kao, H. S. Sheu, Y. P. Chiang, L. Horng, R. F. Hsueh, S. L. Young, W. F. Pong, J. H. Huang

Research output: Contribution to journalArticle

Abstract

Polycrystalline single phase (La2-xSrx)MnO 4 (1.10 ≤ x ≤ 1.40) samples were prepared by a citrate precursor method. They have tetragonal K2NiF4 structure with a space group of I4/mmm, increasing x, unit-cell a-axis increases and c-axis decreases, which is a result of decreasing of the Jahn-Teller effect due to the increase of the Mn(IV) ion. Spin glass state exists at low temperature and a hump observed from the susceptibility (χ) measurement is probably caused by the interactions of several magnetic phases. Among them, (La 0.6Sr1.4)MnO4 has the largest magnetoresistance ratio ([ρ(H) - ρ(0)]/ρ(0)), which reaches to 78.4% at 48 K. It is not possible to obtain single phase materials with 0.60 ≤ x ≤ 1.00 in the heat treatment temperature range of 1000-1600°C. Impurities were easily observed under SEM and X-ray diffraction patterns. Increasing the heating period and decreasing the temperature, the amount of ABO3 perovskite phase increases. In order to extend the solubility range, of the SrO in the (La 2-xSrx)MnO4, it probably needs a higher temperature (> 1600°C) and a shorter heat treatment period (< 1 h).

Original languageEnglish
Pages (from-to)541-548
Number of pages8
JournalInternational Journal of Modern Physics B
Volume19
Issue number1-3
DOIs
Publication statusPublished - 2005 Jan 3

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heat treatment
Jahn-Teller effect
citrates
spin glass
diffraction patterns
solubility
magnetic permeability
impurities
scanning electron microscopy
heating
temperature
cells
ions
x rays
interactions

All Science Journal Classification (ASJC) codes

  • Statistical and Nonlinear Physics
  • Condensed Matter Physics

Cite this

Wu, M. S., Kao, H. C. I., Sheu, H. S., Chiang, Y. P., Horng, L., Hsueh, R. F., ... Huang, J. H. (2005). Structure and properties of (La2-xSrx)MnO4 compounds. International Journal of Modern Physics B, 19(1-3), 541-548. https://doi.org/10.1142/S0217979205029006
Wu, M. S. ; Kao, H. C.I. ; Sheu, H. S. ; Chiang, Y. P. ; Horng, L. ; Hsueh, R. F. ; Young, S. L. ; Pong, W. F. ; Huang, J. H. / Structure and properties of (La2-xSrx)MnO4 compounds. In: International Journal of Modern Physics B. 2005 ; Vol. 19, No. 1-3. pp. 541-548.
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abstract = "Polycrystalline single phase (La2-xSrx)MnO 4 (1.10 ≤ x ≤ 1.40) samples were prepared by a citrate precursor method. They have tetragonal K2NiF4 structure with a space group of I4/mmm, increasing x, unit-cell a-axis increases and c-axis decreases, which is a result of decreasing of the Jahn-Teller effect due to the increase of the Mn(IV) ion. Spin glass state exists at low temperature and a hump observed from the susceptibility (χ) measurement is probably caused by the interactions of several magnetic phases. Among them, (La 0.6Sr1.4)MnO4 has the largest magnetoresistance ratio ([ρ(H) - ρ(0)]/ρ(0)), which reaches to 78.4{\%} at 48 K. It is not possible to obtain single phase materials with 0.60 ≤ x ≤ 1.00 in the heat treatment temperature range of 1000-1600°C. Impurities were easily observed under SEM and X-ray diffraction patterns. Increasing the heating period and decreasing the temperature, the amount of ABO3 perovskite phase increases. In order to extend the solubility range, of the SrO in the (La 2-xSrx)MnO4, it probably needs a higher temperature (> 1600°C) and a shorter heat treatment period (< 1 h).",
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Wu, MS, Kao, HCI, Sheu, HS, Chiang, YP, Horng, L, Hsueh, RF, Young, SL, Pong, WF & Huang, JH 2005, 'Structure and properties of (La2-xSrx)MnO4 compounds', International Journal of Modern Physics B, vol. 19, no. 1-3, pp. 541-548. https://doi.org/10.1142/S0217979205029006

Structure and properties of (La2-xSrx)MnO4 compounds. / Wu, M. S.; Kao, H. C.I.; Sheu, H. S.; Chiang, Y. P.; Horng, L.; Hsueh, R. F.; Young, S. L.; Pong, W. F.; Huang, J. H.

In: International Journal of Modern Physics B, Vol. 19, No. 1-3, 03.01.2005, p. 541-548.

Research output: Contribution to journalArticle

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T1 - Structure and properties of (La2-xSrx)MnO4 compounds

AU - Wu, M. S.

AU - Kao, H. C.I.

AU - Sheu, H. S.

AU - Chiang, Y. P.

AU - Horng, L.

AU - Hsueh, R. F.

AU - Young, S. L.

AU - Pong, W. F.

AU - Huang, J. H.

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Y1 - 2005/1/3

N2 - Polycrystalline single phase (La2-xSrx)MnO 4 (1.10 ≤ x ≤ 1.40) samples were prepared by a citrate precursor method. They have tetragonal K2NiF4 structure with a space group of I4/mmm, increasing x, unit-cell a-axis increases and c-axis decreases, which is a result of decreasing of the Jahn-Teller effect due to the increase of the Mn(IV) ion. Spin glass state exists at low temperature and a hump observed from the susceptibility (χ) measurement is probably caused by the interactions of several magnetic phases. Among them, (La 0.6Sr1.4)MnO4 has the largest magnetoresistance ratio ([ρ(H) - ρ(0)]/ρ(0)), which reaches to 78.4% at 48 K. It is not possible to obtain single phase materials with 0.60 ≤ x ≤ 1.00 in the heat treatment temperature range of 1000-1600°C. Impurities were easily observed under SEM and X-ray diffraction patterns. Increasing the heating period and decreasing the temperature, the amount of ABO3 perovskite phase increases. In order to extend the solubility range, of the SrO in the (La 2-xSrx)MnO4, it probably needs a higher temperature (> 1600°C) and a shorter heat treatment period (< 1 h).

AB - Polycrystalline single phase (La2-xSrx)MnO 4 (1.10 ≤ x ≤ 1.40) samples were prepared by a citrate precursor method. They have tetragonal K2NiF4 structure with a space group of I4/mmm, increasing x, unit-cell a-axis increases and c-axis decreases, which is a result of decreasing of the Jahn-Teller effect due to the increase of the Mn(IV) ion. Spin glass state exists at low temperature and a hump observed from the susceptibility (χ) measurement is probably caused by the interactions of several magnetic phases. Among them, (La 0.6Sr1.4)MnO4 has the largest magnetoresistance ratio ([ρ(H) - ρ(0)]/ρ(0)), which reaches to 78.4% at 48 K. It is not possible to obtain single phase materials with 0.60 ≤ x ≤ 1.00 in the heat treatment temperature range of 1000-1600°C. Impurities were easily observed under SEM and X-ray diffraction patterns. Increasing the heating period and decreasing the temperature, the amount of ABO3 perovskite phase increases. In order to extend the solubility range, of the SrO in the (La 2-xSrx)MnO4, it probably needs a higher temperature (> 1600°C) and a shorter heat treatment period (< 1 h).

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