Site investigation of ionic substitution in Mn3-x Cox O4 films

S. L. Cheng; Y. H. Tsai; K. M. Kuo; G. Chern; J. G. Lin

doi:10.1109/TMAG.2011.2156393

Site investigation of ionic substitution in Mn_3-x Co_x O₄ films

S. L. Cheng, Y. H. Tsai, K. M. Kuo, G. Chern, J. G. Lin

Department of Chemical and Materials Engineering

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

2 Scopus citations

Abstract

We propose an energy diagram for the isolated Mn²⁺ free electron interacted with external field and crystal field in tetragonal spinel Mn _3-xCo_xO₄ films and provide a simple and effective way to analyze the distribution of cations via the measurement of electron spin resonance (ESR). Based on our ESR results, we suggest that Co ions prefer to enter the tetrahedral sites (A-sites) of spinel structure. However, when the amount of Co ions at A-site reach a critical value, the partial octahedral site (B-site) of Mn ions start to be replaced. With increasing Co content up to 1, the Co ions substitute both A- and B-sites simultaneously and the structure transforms into two phase at x=1.5.

Original language	English
Article number	6027816
Pages (from-to)	4325-4327
Number of pages	3
Journal	IEEE Transactions on Magnetics
Volume	47
Issue number	10
DOIs	https://doi.org/10.1109/TMAG.2011.2156393
State	Published - Oct 2011

Keywords

cation distributions
electron spin resonance

Access to Document

10.1109/TMAG.2011.2156393

Cite this

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title = "Site investigation of ionic substitution in Mn3-x Cox O4 films",

abstract = "We propose an energy diagram for the isolated Mn2+ free electron interacted with external field and crystal field in tetragonal spinel Mn 3-xCoxO4 films and provide a simple and effective way to analyze the distribution of cations via the measurement of electron spin resonance (ESR). Based on our ESR results, we suggest that Co ions prefer to enter the tetrahedral sites (A-sites) of spinel structure. However, when the amount of Co ions at A-site reach a critical value, the partial octahedral site (B-site) of Mn ions start to be replaced. With increasing Co content up to 1, the Co ions substitute both A- and B-sites simultaneously and the structure transforms into two phase at x=1.5.",

keywords = "cation distributions, electron spin resonance",

author = "Cheng, {S. L.} and Tsai, {Y. H.} and Kuo, {K. M.} and G. Chern and Lin, {J. G.}",

note = "Funding Information: This work was supported in part by National Science Council of China under Project no. 99-2112-M-002-022-MY3.",

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T1 - Site investigation of ionic substitution in Mn3-x Cox O4 films

AU - Cheng, S. L.

AU - Tsai, Y. H.

AU - Kuo, K. M.

AU - Chern, G.

AU - Lin, J. G.

N1 - Funding Information: This work was supported in part by National Science Council of China under Project no. 99-2112-M-002-022-MY3.

PY - 2011/10

Y1 - 2011/10

N2 - We propose an energy diagram for the isolated Mn2+ free electron interacted with external field and crystal field in tetragonal spinel Mn 3-xCoxO4 films and provide a simple and effective way to analyze the distribution of cations via the measurement of electron spin resonance (ESR). Based on our ESR results, we suggest that Co ions prefer to enter the tetrahedral sites (A-sites) of spinel structure. However, when the amount of Co ions at A-site reach a critical value, the partial octahedral site (B-site) of Mn ions start to be replaced. With increasing Co content up to 1, the Co ions substitute both A- and B-sites simultaneously and the structure transforms into two phase at x=1.5.

AB - We propose an energy diagram for the isolated Mn2+ free electron interacted with external field and crystal field in tetragonal spinel Mn 3-xCoxO4 films and provide a simple and effective way to analyze the distribution of cations via the measurement of electron spin resonance (ESR). Based on our ESR results, we suggest that Co ions prefer to enter the tetrahedral sites (A-sites) of spinel structure. However, when the amount of Co ions at A-site reach a critical value, the partial octahedral site (B-site) of Mn ions start to be replaced. With increasing Co content up to 1, the Co ions substitute both A- and B-sites simultaneously and the structure transforms into two phase at x=1.5.

KW - cation distributions

KW - electron spin resonance

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U2 - 10.1109/TMAG.2011.2156393

DO - 10.1109/TMAG.2011.2156393

M3 - 期刊論文

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JO - IEEE Transactions on Magnetics

JF - IEEE Transactions on Magnetics

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