Electron doping of Ca4Mn3O10 induced by vanadium substitution

Maria Deus Carvalho; Rui P. Borges; A. V. Girão; M. M. Cruz; M. E. Melo Jorge; G. Bonfait; P. Dluzewski; M. Godinho

doi:10.1021/cm050395r

Electron doping of Ca₄Mn₃O₁₀ induced by vanadium substitution

Maria Deus Carvalho, Rui P. Borges, A. V. Girão, M. M. Cruz, M. E. Melo Jorge, G. Bonfait, P. Dluzewski, M. Godinho

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10 Citations (Scopus)

Abstract

In this work, electron doping of the anisotropic phase Ca ₄Mn₃O₁₀ was achieved by substitution of manganese by vanadium. No significant structural modifications were detected to the highest substitution ratio of 10% achieved. The introduction of vanadium decreases the electrical resistivity, described as two-dimensional variable range hopping, and induces the appearance of a ferromagnetic behavior. Consistently negative magnetoresistance develops in the magnetic ordered state. These results are characteristic of the presence of double exchange interactions, indicating that vanadium doping induces mixed valence of manganese.

Original language	English
Pages (from-to)	4852-4857
Number of pages	6
Journal	Chemistry Of Materials
Volume	17
Issue number	19
DOIs	https://doi.org/10.1021/cm050395r
Publication status	Published - 20 Sept 2005

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abstract = "In this work, electron doping of the anisotropic phase Ca 4Mn3O10 was achieved by substitution of manganese by vanadium. No significant structural modifications were detected to the highest substitution ratio of 10% achieved. The introduction of vanadium decreases the electrical resistivity, described as two-dimensional variable range hopping, and induces the appearance of a ferromagnetic behavior. Consistently negative magnetoresistance develops in the magnetic ordered state. These results are characteristic of the presence of double exchange interactions, indicating that vanadium doping induces mixed valence of manganese.",

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T1 - Electron doping of Ca4Mn3O10 induced by vanadium substitution

AU - Carvalho, Maria Deus

AU - Borges, Rui P.

AU - Girão, A. V.

AU - Cruz, M. M.

AU - Jorge, M. E. Melo

AU - Bonfait, G.

AU - Dluzewski, P.

AU - Godinho, M.

PY - 2005/9/20

Y1 - 2005/9/20

N2 - In this work, electron doping of the anisotropic phase Ca 4Mn3O10 was achieved by substitution of manganese by vanadium. No significant structural modifications were detected to the highest substitution ratio of 10% achieved. The introduction of vanadium decreases the electrical resistivity, described as two-dimensional variable range hopping, and induces the appearance of a ferromagnetic behavior. Consistently negative magnetoresistance develops in the magnetic ordered state. These results are characteristic of the presence of double exchange interactions, indicating that vanadium doping induces mixed valence of manganese.

AB - In this work, electron doping of the anisotropic phase Ca 4Mn3O10 was achieved by substitution of manganese by vanadium. No significant structural modifications were detected to the highest substitution ratio of 10% achieved. The introduction of vanadium decreases the electrical resistivity, described as two-dimensional variable range hopping, and induces the appearance of a ferromagnetic behavior. Consistently negative magnetoresistance develops in the magnetic ordered state. These results are characteristic of the presence of double exchange interactions, indicating that vanadium doping induces mixed valence of manganese.

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JO - Chemistry Of Materials

JF - Chemistry Of Materials

IS - 19

ER -

Electron doping of Ca₄Mn₃O₁₀ induced by vanadium substitution

Abstract

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