Electron paramagnetic resonance, magnetic and electrical properties of CoFe2O4 nanoparticles
CoFe2O4 nanoparticles were prepared by solution combustion method. The nanoparticle are characterized by powder X-ray diffraction (PXRD), Fourier transform infrared spectroscopy and scanning electron microscopy (SEM). PXRD reveals single phase, cubic spinel structure with Fd3¯m (227) space group. SE...
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| Veröffentlicht in: | Journal of magnetism and magnetic materials 2013-08, Vol.339, p.40-45 |
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| creator | Jnaneshwara, D.M. Avadhani, D.N. Daruka Prasad, B. Nagabhushana, B.M. Nagabhushana, H. Sharma, S.C. Shivakumara, C. Rao, J.L. Gopal, N.O. Ke, Shyue-Chu Chakradhar, R.P.S. |
| description | CoFe2O4 nanoparticles were prepared by solution combustion method. The nanoparticle are characterized by powder X-ray diffraction (PXRD), Fourier transform infrared spectroscopy and scanning electron microscopy (SEM). PXRD reveals single phase, cubic spinel structure with Fd3¯m (227) space group. SEM micrograph shows the particles are agglomerated and porous in nature. Electron paramagnetic resonance spectrum exhibits a broad resonance signal g=2.150 and is attributed to super exchange between Fe3+ and Co2+. Magnetization values of CoFe2O4 nanoparticle are lower when compared to the literature values of bulk samples. This can be attributed to the surface spin canting due to large surface-to-volume ratio for a nanoscale system. The variation of dielectric constant, dielectric loss, loss tangent and AC conductivity of as-synthesized nano CoFe2O4 particles at room temperature as a function of frequency has been studied. The magnetic and dielectric properties of the samples show that they are suitable for electronic and biomedical applications.
► CoFe2O4 magnetic nanopowder has been prepared at much lower temperature. ► Sample is well characterized by PXRD, SEM and FTIR spectroscopy. ► Magnetic, electrical and dielectric properties were reported. ► EPR and magnetic properties were correlated to compare the magneto anisotropy. |
| doi_str_mv | 10.1016/j.jmmm.2013.02.028 |
| format | Article |
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► CoFe2O4 magnetic nanopowder has been prepared at much lower temperature. ► Sample is well characterized by PXRD, SEM and FTIR spectroscopy. ► Magnetic, electrical and dielectric properties were reported. ► EPR and magnetic properties were correlated to compare the magneto anisotropy.</description><identifier>ISSN: 0304-8853</identifier><identifier>DOI: 10.1016/j.jmmm.2013.02.028</identifier><identifier>CODEN: JMMMDC</identifier><language>eng</language><publisher>Amsterdam: Elsevier B.V</publisher><subject>Combustion ; Condensed matter: electronic structure, electrical, magnetic, and optical properties ; Dielectric loss ; Electron paramagnetic resonance ; Electronics ; EPR ; Exact sciences and technology ; Magnetic properties and materials ; Magnetic properties of nanostructures ; Nanocomposites ; Nanomaterials ; Nanoparticle ; Nanoparticles ; Nanostructure ; Physics ; Saturation magnetization ; Scanning electron microscopy</subject><ispartof>Journal of magnetism and magnetic materials, 2013-08, Vol.339, p.40-45</ispartof><rights>2013 Elsevier B.V.</rights><rights>2014 INIST-CNRS</rights><lds50>peer_reviewed</lds50><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c396t-80dab9e74e88e81f7fd8460f93695cb271fe0867aa9b57ff2b0720750a4630933</citedby><cites>FETCH-LOGICAL-c396t-80dab9e74e88e81f7fd8460f93695cb271fe0867aa9b57ff2b0720750a4630933</cites></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktohtml>$$Uhttps://dx.doi.org/10.1016/j.jmmm.2013.02.028$$EHTML$$P50$$Gelsevier$$H</linktohtml><link.rule.ids>314,777,781,3537,27905,27906,45976</link.rule.ids><backlink>$$Uhttp://pascal-francis.inist.fr/vibad/index.php?action=getRecordDetail&idt=27316995$$DView record in Pascal Francis$$Hfree_for_read</backlink></links><search><creatorcontrib>Jnaneshwara, D.M.</creatorcontrib><creatorcontrib>Avadhani, D.N.</creatorcontrib><creatorcontrib>Daruka Prasad, B.</creatorcontrib><creatorcontrib>Nagabhushana, B.M.</creatorcontrib><creatorcontrib>Nagabhushana, H.</creatorcontrib><creatorcontrib>Sharma, S.C.</creatorcontrib><creatorcontrib>Shivakumara, C.</creatorcontrib><creatorcontrib>Rao, J.L.</creatorcontrib><creatorcontrib>Gopal, N.O.</creatorcontrib><creatorcontrib>Ke, Shyue-Chu</creatorcontrib><creatorcontrib>Chakradhar, R.P.S.</creatorcontrib><title>Electron paramagnetic resonance, magnetic and electrical properties of CoFe2O4 nanoparticles</title><title>Journal of magnetism and magnetic materials</title><description>CoFe2O4 nanoparticles were prepared by solution combustion method. The nanoparticle are characterized by powder X-ray diffraction (PXRD), Fourier transform infrared spectroscopy and scanning electron microscopy (SEM). PXRD reveals single phase, cubic spinel structure with Fd3¯m (227) space group. SEM micrograph shows the particles are agglomerated and porous in nature. Electron paramagnetic resonance spectrum exhibits a broad resonance signal g=2.150 and is attributed to super exchange between Fe3+ and Co2+. Magnetization values of CoFe2O4 nanoparticle are lower when compared to the literature values of bulk samples. This can be attributed to the surface spin canting due to large surface-to-volume ratio for a nanoscale system. The variation of dielectric constant, dielectric loss, loss tangent and AC conductivity of as-synthesized nano CoFe2O4 particles at room temperature as a function of frequency has been studied. The magnetic and dielectric properties of the samples show that they are suitable for electronic and biomedical applications.
► CoFe2O4 magnetic nanopowder has been prepared at much lower temperature. ► Sample is well characterized by PXRD, SEM and FTIR spectroscopy. ► Magnetic, electrical and dielectric properties were reported. ► EPR and magnetic properties were correlated to compare the magneto anisotropy.</description><subject>Combustion</subject><subject>Condensed matter: electronic structure, electrical, magnetic, and optical properties</subject><subject>Dielectric loss</subject><subject>Electron paramagnetic resonance</subject><subject>Electronics</subject><subject>EPR</subject><subject>Exact sciences and technology</subject><subject>Magnetic properties and materials</subject><subject>Magnetic properties of nanostructures</subject><subject>Nanocomposites</subject><subject>Nanomaterials</subject><subject>Nanoparticle</subject><subject>Nanoparticles</subject><subject>Nanostructure</subject><subject>Physics</subject><subject>Saturation magnetization</subject><subject>Scanning electron microscopy</subject><issn>0304-8853</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2013</creationdate><recordtype>article</recordtype><recordid>eNqFkE1LAzEQhveg4Ocf8LQXwYOtk-8seJHSqlDwojchpNmJpOxuarIV_PemVjwqDASG530nPFV1QWBKgMib9XTd9_2UAmFToGX0QXUMDPhEa8GOqpOc1wBAuJbH1eu8QzemONQbm2xv3wYcg6sT5jjYweF1_buzQ1vjNx2c7epNihtMY8BcR1_P4gLpE69LKJamwneYz6pDb7uM5z_vafWymD_PHibLp_vH2d1y4lgjx4mG1q4aVBy1Rk288q3mEnzDZCPciiriEbRU1jYrobynK1AUlADLJYOGsdPqat9b_vS-xTyaPmSHXWcHjNtsiBJMCM4l_x8VIJmWlIiC0j3qUsw5oTebFHqbPg0BszNt1mZn2uxMG6BldAld_vTbXCz5VCSG_JukihHZNLvy2z2HxctHwGSyC1iEtyEVxaaN4a8zX0lvleo</recordid><startdate>20130801</startdate><enddate>20130801</enddate><creator>Jnaneshwara, D.M.</creator><creator>Avadhani, D.N.</creator><creator>Daruka Prasad, B.</creator><creator>Nagabhushana, B.M.</creator><creator>Nagabhushana, H.</creator><creator>Sharma, S.C.</creator><creator>Shivakumara, C.</creator><creator>Rao, J.L.</creator><creator>Gopal, N.O.</creator><creator>Ke, Shyue-Chu</creator><creator>Chakradhar, R.P.S.</creator><general>Elsevier B.V</general><general>Elsevier</general><scope>IQODW</scope><scope>AAYXX</scope><scope>CITATION</scope><scope>7U5</scope><scope>8FD</scope><scope>L7M</scope><scope>7SR</scope><scope>8BQ</scope><scope>JG9</scope></search><sort><creationdate>20130801</creationdate><title>Electron paramagnetic resonance, magnetic and electrical properties of CoFe2O4 nanoparticles</title><author>Jnaneshwara, D.M. ; Avadhani, D.N. ; Daruka Prasad, B. ; Nagabhushana, B.M. ; Nagabhushana, H. ; Sharma, S.C. ; Shivakumara, C. ; Rao, J.L. ; Gopal, N.O. ; Ke, Shyue-Chu ; Chakradhar, R.P.S.</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c396t-80dab9e74e88e81f7fd8460f93695cb271fe0867aa9b57ff2b0720750a4630933</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2013</creationdate><topic>Combustion</topic><topic>Condensed matter: electronic structure, electrical, magnetic, and optical properties</topic><topic>Dielectric loss</topic><topic>Electron paramagnetic resonance</topic><topic>Electronics</topic><topic>EPR</topic><topic>Exact sciences and technology</topic><topic>Magnetic properties and materials</topic><topic>Magnetic properties of nanostructures</topic><topic>Nanocomposites</topic><topic>Nanomaterials</topic><topic>Nanoparticle</topic><topic>Nanoparticles</topic><topic>Nanostructure</topic><topic>Physics</topic><topic>Saturation magnetization</topic><topic>Scanning electron microscopy</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Jnaneshwara, D.M.</creatorcontrib><creatorcontrib>Avadhani, D.N.</creatorcontrib><creatorcontrib>Daruka Prasad, B.</creatorcontrib><creatorcontrib>Nagabhushana, B.M.</creatorcontrib><creatorcontrib>Nagabhushana, H.</creatorcontrib><creatorcontrib>Sharma, S.C.</creatorcontrib><creatorcontrib>Shivakumara, C.</creatorcontrib><creatorcontrib>Rao, J.L.</creatorcontrib><creatorcontrib>Gopal, N.O.</creatorcontrib><creatorcontrib>Ke, Shyue-Chu</creatorcontrib><creatorcontrib>Chakradhar, R.P.S.</creatorcontrib><collection>Pascal-Francis</collection><collection>CrossRef</collection><collection>Solid State and Superconductivity Abstracts</collection><collection>Technology Research Database</collection><collection>Advanced Technologies Database with Aerospace</collection><collection>Engineered Materials Abstracts</collection><collection>METADEX</collection><collection>Materials Research Database</collection><jtitle>Journal of magnetism and magnetic materials</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Jnaneshwara, D.M.</au><au>Avadhani, D.N.</au><au>Daruka Prasad, B.</au><au>Nagabhushana, B.M.</au><au>Nagabhushana, H.</au><au>Sharma, S.C.</au><au>Shivakumara, C.</au><au>Rao, J.L.</au><au>Gopal, N.O.</au><au>Ke, Shyue-Chu</au><au>Chakradhar, R.P.S.</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Electron paramagnetic resonance, magnetic and electrical properties of CoFe2O4 nanoparticles</atitle><jtitle>Journal of magnetism and magnetic materials</jtitle><date>2013-08-01</date><risdate>2013</risdate><volume>339</volume><spage>40</spage><epage>45</epage><pages>40-45</pages><issn>0304-8853</issn><coden>JMMMDC</coden><abstract>CoFe2O4 nanoparticles were prepared by solution combustion method. The nanoparticle are characterized by powder X-ray diffraction (PXRD), Fourier transform infrared spectroscopy and scanning electron microscopy (SEM). PXRD reveals single phase, cubic spinel structure with Fd3¯m (227) space group. SEM micrograph shows the particles are agglomerated and porous in nature. Electron paramagnetic resonance spectrum exhibits a broad resonance signal g=2.150 and is attributed to super exchange between Fe3+ and Co2+. Magnetization values of CoFe2O4 nanoparticle are lower when compared to the literature values of bulk samples. This can be attributed to the surface spin canting due to large surface-to-volume ratio for a nanoscale system. The variation of dielectric constant, dielectric loss, loss tangent and AC conductivity of as-synthesized nano CoFe2O4 particles at room temperature as a function of frequency has been studied. The magnetic and dielectric properties of the samples show that they are suitable for electronic and biomedical applications.
► CoFe2O4 magnetic nanopowder has been prepared at much lower temperature. ► Sample is well characterized by PXRD, SEM and FTIR spectroscopy. ► Magnetic, electrical and dielectric properties were reported. ► EPR and magnetic properties were correlated to compare the magneto anisotropy.</abstract><cop>Amsterdam</cop><pub>Elsevier B.V</pub><doi>10.1016/j.jmmm.2013.02.028</doi><tpages>6</tpages></addata></record> |
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| subjects | Combustion Condensed matter: electronic structure, electrical, magnetic, and optical properties Dielectric loss Electron paramagnetic resonance Electronics EPR Exact sciences and technology Magnetic properties and materials Magnetic properties of nanostructures Nanocomposites Nanomaterials Nanoparticle Nanoparticles Nanostructure Physics Saturation magnetization Scanning electron microscopy |
| title | Electron paramagnetic resonance, magnetic and electrical properties of CoFe2O4 nanoparticles |
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