Effect of Fe incorporation on cation distributions and hopping conductions in Ni-Mn-Co-O spinel oxides

Hyuk Su Han; Kyoung Ryeol Park; Yu Rim Hong; Kwangbo Shim; Sungwook Mhin

doi:10.1016/j.jallcom.2017.10.216

Effect of Fe incorporation on cation distributions and hopping conductions in Ni-Mn-Co-O spinel oxides

Hyuk Su Han, Kyoung Ryeol Park, Yu Rim Hong, Kwangbo Shim, Sungwook Mhin

Department of Energy and Materials Engineering

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

45 Scopus citations

Abstract

Effect of Fe incorporation on electrical properties of (Ni_xCo_yMn_3-x-y)O₄ (NMC) spinel compound is investigated for the application to a negative temperature coefficient (NTC) thermistor. Cation distribution of the Fe doped NMC (FNMC) is calculated based on the size of ions located at tetragonal A sites and octahedral B sites in spinel structure, which can be closely related with temperature dependent electrical properties of the FNMC. With change of Fe contents, the ratio of Mn³⁺/Mn⁴⁺ in octahedral B site of FNMC is changed which can determine the temperature sensitivity factor (B-value). Hopping conduction mode relating with activation energy and hopping distance was also discussed depending on Fe contents, based on the small polaron hopping theory.

Original language	English
Pages (from-to)	486-490
Number of pages	5
Journal	Journal of Alloys and Compounds
Volume	732
DOIs	https://doi.org/10.1016/j.jallcom.2017.10.216
State	Published - 25 Jan 2018

Keywords

Fe-Ni-Mn-Co-O
Hopping conduction
Spinel oxide
Thermistors

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10.1016/j.jallcom.2017.10.216

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title = "Effect of Fe incorporation on cation distributions and hopping conductions in Ni-Mn-Co-O spinel oxides",

abstract = "Effect of Fe incorporation on electrical properties of (NixCoyMn3-x-y)O4 (NMC) spinel compound is investigated for the application to a negative temperature coefficient (NTC) thermistor. Cation distribution of the Fe doped NMC (FNMC) is calculated based on the size of ions located at tetragonal A sites and octahedral B sites in spinel structure, which can be closely related with temperature dependent electrical properties of the FNMC. With change of Fe contents, the ratio of Mn3+/Mn4+ in octahedral B site of FNMC is changed which can determine the temperature sensitivity factor (B-value). Hopping conduction mode relating with activation energy and hopping distance was also discussed depending on Fe contents, based on the small polaron hopping theory.",

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author = "Han, {Hyuk Su} and Park, {Kyoung Ryeol} and Hong, {Yu Rim} and Kwangbo Shim and Sungwook Mhin",

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doi = "10.1016/j.jallcom.2017.10.216",

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T1 - Effect of Fe incorporation on cation distributions and hopping conductions in Ni-Mn-Co-O spinel oxides

AU - Han, Hyuk Su

AU - Park, Kyoung Ryeol

AU - Hong, Yu Rim

AU - Shim, Kwangbo

AU - Mhin, Sungwook

PY - 2018/1/25

Y1 - 2018/1/25

N2 - Effect of Fe incorporation on electrical properties of (NixCoyMn3-x-y)O4 (NMC) spinel compound is investigated for the application to a negative temperature coefficient (NTC) thermistor. Cation distribution of the Fe doped NMC (FNMC) is calculated based on the size of ions located at tetragonal A sites and octahedral B sites in spinel structure, which can be closely related with temperature dependent electrical properties of the FNMC. With change of Fe contents, the ratio of Mn3+/Mn4+ in octahedral B site of FNMC is changed which can determine the temperature sensitivity factor (B-value). Hopping conduction mode relating with activation energy and hopping distance was also discussed depending on Fe contents, based on the small polaron hopping theory.

AB - Effect of Fe incorporation on electrical properties of (NixCoyMn3-x-y)O4 (NMC) spinel compound is investigated for the application to a negative temperature coefficient (NTC) thermistor. Cation distribution of the Fe doped NMC (FNMC) is calculated based on the size of ions located at tetragonal A sites and octahedral B sites in spinel structure, which can be closely related with temperature dependent electrical properties of the FNMC. With change of Fe contents, the ratio of Mn3+/Mn4+ in octahedral B site of FNMC is changed which can determine the temperature sensitivity factor (B-value). Hopping conduction mode relating with activation energy and hopping distance was also discussed depending on Fe contents, based on the small polaron hopping theory.

KW - Fe-Ni-Mn-Co-O

KW - Hopping conduction

KW - Spinel oxide

KW - Thermistors

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DO - 10.1016/j.jallcom.2017.10.216

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SN - 0925-8388

VL - 732

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EP - 490

JO - Journal of Alloys and Compounds

JF - Journal of Alloys and Compounds

ER -

Effect of Fe incorporation on cation distributions and hopping conductions in Ni-Mn-Co-O spinel oxides

Abstract

Keywords

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