Spin dynamics in 57Fe-doped TiO2 anatase nanoparticles
In this paper we present electron paramagnetic resonance (EPR) and Mössbauer (transmission method, TMS and measurements in the scattering method, CEMS) experiments on 57Fe (0.1–1 at.%) doped nanocrystalline anatase‐type TiO2, synthesized by a hydrothermal method. Different Fe3+ and Fe2+ ions positio...
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| Veröffentlicht in: | Physica Status Solidi (b) 2011-12, Vol.248 (12), p.2927-2931 |
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| container_title | Physica Status Solidi (b) |
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| creator | Grecu, Maria Nicoleta Constantinescu, Serban Tărăbăşanu-Mihăilă, Doina Ghica, Daniela Bibicu, Ion |
| description | In this paper we present electron paramagnetic resonance (EPR) and Mössbauer (transmission method, TMS and measurements in the scattering method, CEMS) experiments on 57Fe (0.1–1 at.%) doped nanocrystalline anatase‐type TiO2, synthesized by a hydrothermal method. Different Fe3+ and Fe2+ ions positions, with various hyperfine interactions evidenced in Mössbauer spectra (MS), confirm a partial magnetic ordering at room temperature. The magnetic hyperfine fields in the TMS spectra, better resolved at lower temperatures, do not change essentially with temperature. The first CEMS measurements, carried out on iron‐doped TiO2 nanoparticles, reveal a larger disorder in the surface particles layer. The temperature dependence of the double integral EPR spectral intensity, proportional with the sample susceptibility, shows an anomalous behaviour. It suggests the bound magnetic polaron (BMP) mechanism for the magnetic ordering. |
| doi_str_mv | 10.1002/pssb.201147124 |
| format | Article |
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Different Fe3+ and Fe2+ ions positions, with various hyperfine interactions evidenced in Mössbauer spectra (MS), confirm a partial magnetic ordering at room temperature. The magnetic hyperfine fields in the TMS spectra, better resolved at lower temperatures, do not change essentially with temperature. The first CEMS measurements, carried out on iron‐doped TiO2 nanoparticles, reveal a larger disorder in the surface particles layer. The temperature dependence of the double integral EPR spectral intensity, proportional with the sample susceptibility, shows an anomalous behaviour. It suggests the bound magnetic polaron (BMP) mechanism for the magnetic ordering.</description><identifier>ISSN: 0370-1972</identifier><identifier>ISSN: 1521-3951</identifier><identifier>EISSN: 1521-3951</identifier><identifier>DOI: 10.1002/pssb.201147124</identifier><identifier>CODEN: PSSBBD</identifier><language>eng</language><publisher>Berlin: WILEY-VCH Verlag</publisher><subject>Anatase ; anatase nanoparticles ; Condensed matter: electronic structure, electrical, magnetic, and optical properties ; Electron paramagnetic resonance ; Electron paramagnetic resonance and relaxation ; EPR ; Exact sciences and technology ; Magnetic permeability ; magnetic polarons ; Magnetic properties and materials ; Magnetic properties of nanostructures ; Magnetic resonances and relaxations in condensed matter, mössbauer effect ; Mossbauer effect ; Mössbauer effect; other γ-ray spectroscopy ; Mössbauer spectroscopy ; Nanoparticles ; Order disorder ; Physics ; Spectra ; Titanium dioxide</subject><ispartof>Physica Status Solidi (b), 2011-12, Vol.248 (12), p.2927-2931</ispartof><rights>Copyright © 2011 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim</rights><rights>2015 INIST-CNRS</rights><lds50>peer_reviewed</lds50><woscitedreferencessubscribed>false</woscitedreferencessubscribed></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktopdf>$$Uhttps://onlinelibrary.wiley.com/doi/pdf/10.1002%2Fpssb.201147124$$EPDF$$P50$$Gwiley$$H</linktopdf><linktohtml>$$Uhttps://onlinelibrary.wiley.com/doi/full/10.1002%2Fpssb.201147124$$EHTML$$P50$$Gwiley$$H</linktohtml><link.rule.ids>314,776,780,1411,27901,27902,45550,45551</link.rule.ids><backlink>$$Uhttp://pascal-francis.inist.fr/vibad/index.php?action=getRecordDetail&idt=25254693$$DView record in Pascal Francis$$Hfree_for_read</backlink></links><search><creatorcontrib>Grecu, Maria Nicoleta</creatorcontrib><creatorcontrib>Constantinescu, Serban</creatorcontrib><creatorcontrib>Tărăbăşanu-Mihăilă, Doina</creatorcontrib><creatorcontrib>Ghica, Daniela</creatorcontrib><creatorcontrib>Bibicu, Ion</creatorcontrib><title>Spin dynamics in 57Fe-doped TiO2 anatase nanoparticles</title><title>Physica Status Solidi (b)</title><addtitle>Phys. Status Solidi B</addtitle><description>In this paper we present electron paramagnetic resonance (EPR) and Mössbauer (transmission method, TMS and measurements in the scattering method, CEMS) experiments on 57Fe (0.1–1 at.%) doped nanocrystalline anatase‐type TiO2, synthesized by a hydrothermal method. Different Fe3+ and Fe2+ ions positions, with various hyperfine interactions evidenced in Mössbauer spectra (MS), confirm a partial magnetic ordering at room temperature. The magnetic hyperfine fields in the TMS spectra, better resolved at lower temperatures, do not change essentially with temperature. The first CEMS measurements, carried out on iron‐doped TiO2 nanoparticles, reveal a larger disorder in the surface particles layer. The temperature dependence of the double integral EPR spectral intensity, proportional with the sample susceptibility, shows an anomalous behaviour. It suggests the bound magnetic polaron (BMP) mechanism for the magnetic ordering.</description><subject>Anatase</subject><subject>anatase nanoparticles</subject><subject>Condensed matter: electronic structure, electrical, magnetic, and optical properties</subject><subject>Electron paramagnetic resonance</subject><subject>Electron paramagnetic resonance and relaxation</subject><subject>EPR</subject><subject>Exact sciences and technology</subject><subject>Magnetic permeability</subject><subject>magnetic polarons</subject><subject>Magnetic properties and materials</subject><subject>Magnetic properties of nanostructures</subject><subject>Magnetic resonances and relaxations in condensed matter, mössbauer effect</subject><subject>Mossbauer effect</subject><subject>Mössbauer effect; other γ-ray spectroscopy</subject><subject>Mössbauer spectroscopy</subject><subject>Nanoparticles</subject><subject>Order disorder</subject><subject>Physics</subject><subject>Spectra</subject><subject>Titanium dioxide</subject><issn>0370-1972</issn><issn>1521-3951</issn><issn>1521-3951</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2011</creationdate><recordtype>article</recordtype><recordid>eNo9kDFPwzAQhS0EEqWwMmdBYkm5O9txMkJFC1JFQS1UYrGc2JUMaRriVNB_T6BVp3tP73s3PMYuEQYIQDd1CPmAAFEoJHHEeigJY55JPGY94ApizBSdsrMQPgBAIcceS2a1ryK7rczKFyHqtFQjF9t17Ww091OKTGVaE1xUmWpdm6b1RenCOTtZmjK4i_3ts9fR_Xz4EE-m48fh7ST2xBMR5wKtNWnqUokSRQpkeQ45KXAJKZuJTgtLVi07k8g0t4BgMnCuEJRI4n12vftbN-uvjQutXvlQuLI0lVtvgkbgSBmojHfo1R41oTDlsjFV4YOuG78yzVaTJCmSfy7bcd--dNtDjqD_VtR_K-rDivp5Nrs7uK4b77o-tO7n0DXNp04UV1Ivnsb6XZJ4w0WqX_gv-g90rQ</recordid><startdate>201112</startdate><enddate>201112</enddate><creator>Grecu, Maria Nicoleta</creator><creator>Constantinescu, Serban</creator><creator>Tărăbăşanu-Mihăilă, Doina</creator><creator>Ghica, Daniela</creator><creator>Bibicu, Ion</creator><general>WILEY-VCH Verlag</general><general>WILEY‐VCH Verlag</general><general>Wiley-VCH</general><scope>BSCLL</scope><scope>IQODW</scope><scope>7QQ</scope><scope>7U5</scope><scope>8FD</scope><scope>JG9</scope><scope>L7M</scope></search><sort><creationdate>201112</creationdate><title>Spin dynamics in 57Fe-doped TiO2 anatase nanoparticles</title><author>Grecu, Maria Nicoleta ; Constantinescu, Serban ; Tărăbăşanu-Mihăilă, Doina ; Ghica, Daniela ; Bibicu, Ion</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-i2364-b41dda88e851514802d3b0b270e627d940b24d2d7f7d9658bd010a90eec426523</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2011</creationdate><topic>Anatase</topic><topic>anatase nanoparticles</topic><topic>Condensed matter: electronic structure, electrical, magnetic, and optical properties</topic><topic>Electron paramagnetic resonance</topic><topic>Electron paramagnetic resonance and relaxation</topic><topic>EPR</topic><topic>Exact sciences and technology</topic><topic>Magnetic permeability</topic><topic>magnetic polarons</topic><topic>Magnetic properties and materials</topic><topic>Magnetic properties of nanostructures</topic><topic>Magnetic resonances and relaxations in condensed matter, mössbauer effect</topic><topic>Mossbauer effect</topic><topic>Mössbauer effect; other γ-ray spectroscopy</topic><topic>Mössbauer spectroscopy</topic><topic>Nanoparticles</topic><topic>Order disorder</topic><topic>Physics</topic><topic>Spectra</topic><topic>Titanium dioxide</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Grecu, Maria Nicoleta</creatorcontrib><creatorcontrib>Constantinescu, Serban</creatorcontrib><creatorcontrib>Tărăbăşanu-Mihăilă, Doina</creatorcontrib><creatorcontrib>Ghica, Daniela</creatorcontrib><creatorcontrib>Bibicu, Ion</creatorcontrib><collection>Istex</collection><collection>Pascal-Francis</collection><collection>Ceramic Abstracts</collection><collection>Solid State and Superconductivity Abstracts</collection><collection>Technology Research Database</collection><collection>Materials Research Database</collection><collection>Advanced Technologies Database with Aerospace</collection><jtitle>Physica Status Solidi (b)</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Grecu, Maria Nicoleta</au><au>Constantinescu, Serban</au><au>Tărăbăşanu-Mihăilă, Doina</au><au>Ghica, Daniela</au><au>Bibicu, Ion</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Spin dynamics in 57Fe-doped TiO2 anatase nanoparticles</atitle><jtitle>Physica Status Solidi (b)</jtitle><addtitle>Phys. Status Solidi B</addtitle><date>2011-12</date><risdate>2011</risdate><volume>248</volume><issue>12</issue><spage>2927</spage><epage>2931</epage><pages>2927-2931</pages><issn>0370-1972</issn><issn>1521-3951</issn><eissn>1521-3951</eissn><coden>PSSBBD</coden><abstract>In this paper we present electron paramagnetic resonance (EPR) and Mössbauer (transmission method, TMS and measurements in the scattering method, CEMS) experiments on 57Fe (0.1–1 at.%) doped nanocrystalline anatase‐type TiO2, synthesized by a hydrothermal method. Different Fe3+ and Fe2+ ions positions, with various hyperfine interactions evidenced in Mössbauer spectra (MS), confirm a partial magnetic ordering at room temperature. The magnetic hyperfine fields in the TMS spectra, better resolved at lower temperatures, do not change essentially with temperature. The first CEMS measurements, carried out on iron‐doped TiO2 nanoparticles, reveal a larger disorder in the surface particles layer. The temperature dependence of the double integral EPR spectral intensity, proportional with the sample susceptibility, shows an anomalous behaviour. It suggests the bound magnetic polaron (BMP) mechanism for the magnetic ordering.</abstract><cop>Berlin</cop><pub>WILEY-VCH Verlag</pub><doi>10.1002/pssb.201147124</doi><tpages>5</tpages></addata></record> |
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| subjects | Anatase anatase nanoparticles Condensed matter: electronic structure, electrical, magnetic, and optical properties Electron paramagnetic resonance Electron paramagnetic resonance and relaxation EPR Exact sciences and technology Magnetic permeability magnetic polarons Magnetic properties and materials Magnetic properties of nanostructures Magnetic resonances and relaxations in condensed matter, mössbauer effect Mossbauer effect Mössbauer effect other γ-ray spectroscopy Mössbauer spectroscopy Nanoparticles Order disorder Physics Spectra Titanium dioxide |
| title | Spin dynamics in 57Fe-doped TiO2 anatase nanoparticles |
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