Structural, microstructural and magnetic characterization of the β-CoTe nanophase synthesized by a novel mechanochemical method
Autor(a) principal: | |
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Data de Publicação: | 2021 |
Outros Autores: | , , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Repositório Institucional da UFRGS |
Texto Completo: | http://hdl.handle.net/10183/222838 |
Resumo: | This work reports an unprecedented mechanochemistry synthesis of β-CoTe and its systematic characterization through X-ray powder diffraction (XRPD), transmission electron microscopy (TEM), and magnetometry techniques. The mechanical alloying produced the desired material within 6 h along with minor impurities, showing good stabilization for higher milling times (15 h) and long-term storage. XRPD characterization employed the Rietveld profile fitting analysis with fundamental parameters analysis in a direct convolution approach, giving the material's structure and microstructure information. For the spherical shape, the diameter mass average of the crystallites furnished values around 13 nm with 1.1% of microstrain. The double-Voigt procedure also modeled a triaxial ellipsoid shape for the crystallite size and obtained a surface-weighted average value for its volume around 150 nm3. TEM images confirmed the nanometric size visually and showed the crystallites to aggregate in large particles hundreds of nanometers in size. Measuring hundreds of supposed crystallite sizes, we could achieve a numerical distribution of their sizes with an average of 16 nm. The magnetization analysis performed both experimentally and via numerical simulations showed that β-CoTe is predominantly superparamagnetic with a magnetic domain size compatible with the double-Voigt one. |
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Malagutti, Marcelo AugustoUlbrich, K. F.Paes, Vagner Zeizer CarvalhoGeshev, Julian PenkovCampos, Carlos Eduardo Maduro de2021-06-25T04:24:42Z20212046-2069http://hdl.handle.net/10183/222838001123525This work reports an unprecedented mechanochemistry synthesis of β-CoTe and its systematic characterization through X-ray powder diffraction (XRPD), transmission electron microscopy (TEM), and magnetometry techniques. The mechanical alloying produced the desired material within 6 h along with minor impurities, showing good stabilization for higher milling times (15 h) and long-term storage. XRPD characterization employed the Rietveld profile fitting analysis with fundamental parameters analysis in a direct convolution approach, giving the material's structure and microstructure information. For the spherical shape, the diameter mass average of the crystallites furnished values around 13 nm with 1.1% of microstrain. The double-Voigt procedure also modeled a triaxial ellipsoid shape for the crystallite size and obtained a surface-weighted average value for its volume around 150 nm3. TEM images confirmed the nanometric size visually and showed the crystallites to aggregate in large particles hundreds of nanometers in size. Measuring hundreds of supposed crystallite sizes, we could achieve a numerical distribution of their sizes with an average of 16 nm. The magnetization analysis performed both experimentally and via numerical simulations showed that β-CoTe is predominantly superparamagnetic with a magnetic domain size compatible with the double-Voigt one.application/pdfengRSC Advances. Cambridge. Vol. 11, no. 9 (2021), p. 5027-5034Microscopia eletrônica de transmissãoDifração de raios XMagnetometriaMétodo de RietveldNanomateriaisStructural, microstructural and magnetic characterization of the β-CoTe nanophase synthesized by a novel mechanochemical methodEstrangeiroinfo:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/openAccessreponame:Repositório Institucional da UFRGSinstname:Universidade Federal do Rio Grande do Sul (UFRGS)instacron:UFRGSTEXT001123525.pdf.txt001123525.pdf.txtExtracted Texttext/plain40858http://www.lume.ufrgs.br/bitstream/10183/222838/2/001123525.pdf.txt6ea0c3beefe45835e66f1c43375833bcMD52ORIGINAL001123525.pdfTexto completo (inglês)application/pdf1027206http://www.lume.ufrgs.br/bitstream/10183/222838/1/001123525.pdfa3ee2b1271d95788cb633d8dfe00f469MD5110183/2228382023-09-17 03:31:39.951873oai:www.lume.ufrgs.br:10183/222838Repositório de PublicaçõesPUBhttps://lume.ufrgs.br/oai/requestopendoar:2023-09-17T06:31:39Repositório Institucional da UFRGS - Universidade Federal do Rio Grande do Sul (UFRGS)false |
dc.title.pt_BR.fl_str_mv |
Structural, microstructural and magnetic characterization of the β-CoTe nanophase synthesized by a novel mechanochemical method |
title |
Structural, microstructural and magnetic characterization of the β-CoTe nanophase synthesized by a novel mechanochemical method |
spellingShingle |
Structural, microstructural and magnetic characterization of the β-CoTe nanophase synthesized by a novel mechanochemical method Malagutti, Marcelo Augusto Microscopia eletrônica de transmissão Difração de raios X Magnetometria Método de Rietveld Nanomateriais |
title_short |
Structural, microstructural and magnetic characterization of the β-CoTe nanophase synthesized by a novel mechanochemical method |
title_full |
Structural, microstructural and magnetic characterization of the β-CoTe nanophase synthesized by a novel mechanochemical method |
title_fullStr |
Structural, microstructural and magnetic characterization of the β-CoTe nanophase synthesized by a novel mechanochemical method |
title_full_unstemmed |
Structural, microstructural and magnetic characterization of the β-CoTe nanophase synthesized by a novel mechanochemical method |
title_sort |
Structural, microstructural and magnetic characterization of the β-CoTe nanophase synthesized by a novel mechanochemical method |
author |
Malagutti, Marcelo Augusto |
author_facet |
Malagutti, Marcelo Augusto Ulbrich, K. F. Paes, Vagner Zeizer Carvalho Geshev, Julian Penkov Campos, Carlos Eduardo Maduro de |
author_role |
author |
author2 |
Ulbrich, K. F. Paes, Vagner Zeizer Carvalho Geshev, Julian Penkov Campos, Carlos Eduardo Maduro de |
author2_role |
author author author author |
dc.contributor.author.fl_str_mv |
Malagutti, Marcelo Augusto Ulbrich, K. F. Paes, Vagner Zeizer Carvalho Geshev, Julian Penkov Campos, Carlos Eduardo Maduro de |
dc.subject.por.fl_str_mv |
Microscopia eletrônica de transmissão Difração de raios X Magnetometria Método de Rietveld Nanomateriais |
topic |
Microscopia eletrônica de transmissão Difração de raios X Magnetometria Método de Rietveld Nanomateriais |
description |
This work reports an unprecedented mechanochemistry synthesis of β-CoTe and its systematic characterization through X-ray powder diffraction (XRPD), transmission electron microscopy (TEM), and magnetometry techniques. The mechanical alloying produced the desired material within 6 h along with minor impurities, showing good stabilization for higher milling times (15 h) and long-term storage. XRPD characterization employed the Rietveld profile fitting analysis with fundamental parameters analysis in a direct convolution approach, giving the material's structure and microstructure information. For the spherical shape, the diameter mass average of the crystallites furnished values around 13 nm with 1.1% of microstrain. The double-Voigt procedure also modeled a triaxial ellipsoid shape for the crystallite size and obtained a surface-weighted average value for its volume around 150 nm3. TEM images confirmed the nanometric size visually and showed the crystallites to aggregate in large particles hundreds of nanometers in size. Measuring hundreds of supposed crystallite sizes, we could achieve a numerical distribution of their sizes with an average of 16 nm. The magnetization analysis performed both experimentally and via numerical simulations showed that β-CoTe is predominantly superparamagnetic with a magnetic domain size compatible with the double-Voigt one. |
publishDate |
2021 |
dc.date.accessioned.fl_str_mv |
2021-06-25T04:24:42Z |
dc.date.issued.fl_str_mv |
2021 |
dc.type.driver.fl_str_mv |
Estrangeiro info:eu-repo/semantics/article |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
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article |
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publishedVersion |
dc.identifier.uri.fl_str_mv |
http://hdl.handle.net/10183/222838 |
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2046-2069 |
dc.identifier.nrb.pt_BR.fl_str_mv |
001123525 |
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http://hdl.handle.net/10183/222838 |
dc.language.iso.fl_str_mv |
eng |
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eng |
dc.relation.ispartof.pt_BR.fl_str_mv |
RSC Advances. Cambridge. Vol. 11, no. 9 (2021), p. 5027-5034 |
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info:eu-repo/semantics/openAccess |
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openAccess |
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