Chemical size effect on the magnetic and electrical properties in the (Tb1-xEux)MnO3 (0 ≤ x ≤ 1.0) system

T. S. Chan; R. S. Liu; C. C. Yang; W. H. Li; Y. H. Lien; C. Y. Huang; J. F. Lee

doi:10.1021/jp067680y

Chemical size effect on the magnetic and electrical properties in the (Tb_1-xEu_x)MnO₃ (0 ≤ x ≤ 1.0) system

T. S. Chan, R. S. Liu, C. C. Yang, W. H. Li, Y. H. Lien, C. Y. Huang, J. F. Lee

Department of Physics

Research output: Contribution to journal › Article › peer-review

24 Scopus citations

Abstract

The effect of isovalent chemical substitution of Eu³⁺ into the Tb³⁺ sites on the magnetic and electrical properties of (Tb _1-xEu_x)MnO₃ (0 ≤ x ≤ 1.0) system has been investigated. The orthorhombic structure with space group Pbnm is observed in this series of materials. An increase in Mn-O bond distance with increasing Eu content leads to improvement in the overlap between the Mn 3d and O 2p orbital thereby causing a decrease in activation energy and resistivity. Moreover, as the Eu content increases, the effective moments (μ_eff) are reduced linearly and an exchange coupling is observed in Tb-Tb, Tb-Eu, and Eu-Eu complexes for x = 0.1 and 0.3 samples. Both these features can be related to the substitution of bigger Eu³⁺ ions replacing the original Tb-Tb coupling.

Original language	English
Pages (from-to)	2262-2267
Number of pages	6
Journal	Journal of Physical Chemistry B
Volume	111
Issue number	9
DOIs	https://doi.org/10.1021/jp067680y
State	Published - 8 Mar 2007

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title = "Chemical size effect on the magnetic and electrical properties in the (Tb1-xEux)MnO3 (0 ≤ x ≤ 1.0) system",

abstract = "The effect of isovalent chemical substitution of Eu3+ into the Tb3+ sites on the magnetic and electrical properties of (Tb 1-xEux)MnO3 (0 ≤ x ≤ 1.0) system has been investigated. The orthorhombic structure with space group Pbnm is observed in this series of materials. An increase in Mn-O bond distance with increasing Eu content leads to improvement in the overlap between the Mn 3d and O 2p orbital thereby causing a decrease in activation energy and resistivity. Moreover, as the Eu content increases, the effective moments (μeff) are reduced linearly and an exchange coupling is observed in Tb-Tb, Tb-Eu, and Eu-Eu complexes for x = 0.1 and 0.3 samples. Both these features can be related to the substitution of bigger Eu3+ ions replacing the original Tb-Tb coupling.",

author = "Chan, {T. S.} and Liu, {R. S.} and Yang, {C. C.} and Li, {W. H.} and Lien, {Y. H.} and Huang, {C. Y.} and Lee, {J. F.}",

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T1 - Chemical size effect on the magnetic and electrical properties in the (Tb1-xEux)MnO3 (0 ≤ x ≤ 1.0) system

AU - Chan, T. S.

AU - Liu, R. S.

AU - Yang, C. C.

AU - Li, W. H.

AU - Lien, Y. H.

AU - Huang, C. Y.

AU - Lee, J. F.

PY - 2007/3/8

Y1 - 2007/3/8

N2 - The effect of isovalent chemical substitution of Eu3+ into the Tb3+ sites on the magnetic and electrical properties of (Tb 1-xEux)MnO3 (0 ≤ x ≤ 1.0) system has been investigated. The orthorhombic structure with space group Pbnm is observed in this series of materials. An increase in Mn-O bond distance with increasing Eu content leads to improvement in the overlap between the Mn 3d and O 2p orbital thereby causing a decrease in activation energy and resistivity. Moreover, as the Eu content increases, the effective moments (μeff) are reduced linearly and an exchange coupling is observed in Tb-Tb, Tb-Eu, and Eu-Eu complexes for x = 0.1 and 0.3 samples. Both these features can be related to the substitution of bigger Eu3+ ions replacing the original Tb-Tb coupling.

AB - The effect of isovalent chemical substitution of Eu3+ into the Tb3+ sites on the magnetic and electrical properties of (Tb 1-xEux)MnO3 (0 ≤ x ≤ 1.0) system has been investigated. The orthorhombic structure with space group Pbnm is observed in this series of materials. An increase in Mn-O bond distance with increasing Eu content leads to improvement in the overlap between the Mn 3d and O 2p orbital thereby causing a decrease in activation energy and resistivity. Moreover, as the Eu content increases, the effective moments (μeff) are reduced linearly and an exchange coupling is observed in Tb-Tb, Tb-Eu, and Eu-Eu complexes for x = 0.1 and 0.3 samples. Both these features can be related to the substitution of bigger Eu3+ ions replacing the original Tb-Tb coupling.

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JO - Journal of Physical Chemistry B

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SN - 1089-5647

IS - 9

ER -

Chemical size effect on the magnetic and electrical properties in the (Tb1-xEux)MnO3 (0 ≤ x ≤ 1.0) system

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Chemical size effect on the magnetic and electrical properties in the (Tb_1-xEu_x)MnO₃ (0 ≤ x ≤ 1.0) system