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Magnetic and Electrical Properties of CoRE(2)W(2)O(10) Ceramic Materials

[Image: see text] Microcrystalline samples of CoRE(2)W(2)O(10) tungstates (RE = Y, Dy, Ho, Er) were prepared by a high-temperature solid-state reaction and then sintered into a ceramic form for unique properties and potential applications. For this purpose, structural, microscopic, ultraviolet–visib...

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Autores principales: Sawicki, Bogdan, Tomaszewicz, Elżbieta, Groń, Tadeusz, Oboz, Monika, Gruszka, Irena, Guzik, Adam, Urbanowicz, Piotr
Formato: Online Artículo Texto
Lenguaje:English
Publicado: American Chemical Society 2023
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10568695/
https://www.ncbi.nlm.nih.gov/pubmed/37841119
http://dx.doi.org/10.1021/acsomega.3c04645
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author Sawicki, Bogdan
Tomaszewicz, Elżbieta
Groń, Tadeusz
Oboz, Monika
Gruszka, Irena
Guzik, Adam
Urbanowicz, Piotr
author_facet Sawicki, Bogdan
Tomaszewicz, Elżbieta
Groń, Tadeusz
Oboz, Monika
Gruszka, Irena
Guzik, Adam
Urbanowicz, Piotr
author_sort Sawicki, Bogdan
collection PubMed
description [Image: see text] Microcrystalline samples of CoRE(2)W(2)O(10) tungstates (RE = Y, Dy, Ho, Er) were prepared by a high-temperature solid-state reaction and then sintered into a ceramic form for unique properties and potential applications. For this purpose, structural, microscopic, ultraviolet–visible (UV–vis), magnetic, electrical, and thermoelectric measurements were performed. These studies showed a monoclinic structure, paramagnetism, short-range antiferromagnetic interactions in all samples, long-range ferrimagnetic interactions only in CoY(2)W(2)O(10), poor n-type conductivity of 6.7 × 10(–7) S/m at room temperature, strong thermal activation (E(a1) = 0.7 eV) in the intrinsic region, a strong increase in the power factor (S(2)σ) above 300 K, a Fermi energy (E(F)) of 0.16 eV, and a Fermi temperature (T(F)) of 1800 K. The above studies suggest that anion vacancy levels, which act as doubly charged donors, and to a lesser extent, the mixed valence band of cobalt ions (Co(2+), Co(3+)), which are located below the bottom of the conduction band and below the Fermi level, are responsible for electron transport.
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spelling pubmed-105686952023-10-13 Magnetic and Electrical Properties of CoRE(2)W(2)O(10) Ceramic Materials Sawicki, Bogdan Tomaszewicz, Elżbieta Groń, Tadeusz Oboz, Monika Gruszka, Irena Guzik, Adam Urbanowicz, Piotr ACS Omega [Image: see text] Microcrystalline samples of CoRE(2)W(2)O(10) tungstates (RE = Y, Dy, Ho, Er) were prepared by a high-temperature solid-state reaction and then sintered into a ceramic form for unique properties and potential applications. For this purpose, structural, microscopic, ultraviolet–visible (UV–vis), magnetic, electrical, and thermoelectric measurements were performed. These studies showed a monoclinic structure, paramagnetism, short-range antiferromagnetic interactions in all samples, long-range ferrimagnetic interactions only in CoY(2)W(2)O(10), poor n-type conductivity of 6.7 × 10(–7) S/m at room temperature, strong thermal activation (E(a1) = 0.7 eV) in the intrinsic region, a strong increase in the power factor (S(2)σ) above 300 K, a Fermi energy (E(F)) of 0.16 eV, and a Fermi temperature (T(F)) of 1800 K. The above studies suggest that anion vacancy levels, which act as doubly charged donors, and to a lesser extent, the mixed valence band of cobalt ions (Co(2+), Co(3+)), which are located below the bottom of the conduction band and below the Fermi level, are responsible for electron transport. American Chemical Society 2023-09-28 /pmc/articles/PMC10568695/ /pubmed/37841119 http://dx.doi.org/10.1021/acsomega.3c04645 Text en © 2023 The Authors. Published by American Chemical Society https://creativecommons.org/licenses/by/4.0/Permits the broadest form of re-use including for commercial purposes, provided that author attribution and integrity are maintained (https://creativecommons.org/licenses/by/4.0/).
spellingShingle Sawicki, Bogdan
Tomaszewicz, Elżbieta
Groń, Tadeusz
Oboz, Monika
Gruszka, Irena
Guzik, Adam
Urbanowicz, Piotr
Magnetic and Electrical Properties of CoRE(2)W(2)O(10) Ceramic Materials
title Magnetic and Electrical Properties of CoRE(2)W(2)O(10) Ceramic Materials
title_full Magnetic and Electrical Properties of CoRE(2)W(2)O(10) Ceramic Materials
title_fullStr Magnetic and Electrical Properties of CoRE(2)W(2)O(10) Ceramic Materials
title_full_unstemmed Magnetic and Electrical Properties of CoRE(2)W(2)O(10) Ceramic Materials
title_short Magnetic and Electrical Properties of CoRE(2)W(2)O(10) Ceramic Materials
title_sort magnetic and electrical properties of core(2)w(2)o(10) ceramic materials
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10568695/
https://www.ncbi.nlm.nih.gov/pubmed/37841119
http://dx.doi.org/10.1021/acsomega.3c04645
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