The role of pH on the particle size and magnetic consequence of cobalt ferrite
Cobalt ferrite (CoFe2O4) nanoparticles with various size distributions were prepared by a chemical co-precipitation method at different pH condition from 8 to 13. The structural characterizations of the prepared samples were carried out using powder X-ray diffraction, Fourier transform infrared spec...
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Veröffentlicht in: | Journal of magnetism and magnetic materials 2015-12, Vol.396, p.288-294 |
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description | Cobalt ferrite (CoFe2O4) nanoparticles with various size distributions were prepared by a chemical co-precipitation method at different pH condition from 8 to 13. The structural characterizations of the prepared samples were carried out using powder X-ray diffraction, Fourier transform infrared spectroscopy and field emission scanning electron microscope. The XRD results revealed that a single cubic CoFe2O4 phase with the average crystallite sizes of about 5–24nm were formed. Cation distribution occupancy in tetrahedral and octahedral sites were estimated by employing Rietveld refinement technique. The results showed that the whole series of samples contain a partial inverse spinel structure. FTIR measurements between 370 and 4000cm−1 confirmed the intrinsic cation vibrations of spinel structure of the samples. The room temperature magnetic properties of the samples have been examined using vibrating sample magnetometer. It is found that with increasing the pH of reaction, the magnetization and coercive field could be increased. The sample synthesized at pH~8 and 9 showed superparamagnetic behavior and highest coercive field up to 650Oe is attributed to the sample synthesized with pH~13.
•CoFe2O4 nanoparticles were prepared by co-precipitation method at different pH.•Τhe single cubic phase with the average crystallite sizes of 5–24nm were formed.•Cation distribution in tetrahedral and octahedral sites was estimated using XRD data.•The sample synthesized at pH~8 and 9 showed superparamagnetic behavior.•The crystallinity and crystallite size were increased by increasing the pH. |
doi_str_mv | 10.1016/j.jmmm.2015.08.022 |
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•CoFe2O4 nanoparticles were prepared by co-precipitation method at different pH.•Τhe single cubic phase with the average crystallite sizes of 5–24nm were formed.•Cation distribution in tetrahedral and octahedral sites was estimated using XRD data.•The sample synthesized at pH~8 and 9 showed superparamagnetic behavior.•The crystallinity and crystallite size were increased by increasing the pH.</description><identifier>ISSN: 0304-8853</identifier><identifier>DOI: 10.1016/j.jmmm.2015.08.022</identifier><language>eng</language><publisher>Elsevier B.V</publisher><subject>Cations ; Co-precipitation ; Cobalt ferrite ; Cobalt ferrites ; Coercive force ; Fourier transforms ; Infrared spectroscopy ; Magnetic nanoparticle ; Magnetic properties ; Rietveld refinement ; Spinel</subject><ispartof>Journal of magnetism and magnetic materials, 2015-12, Vol.396, p.288-294</ispartof><rights>2015 Elsevier B.V.</rights><lds50>peer_reviewed</lds50><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c370t-ef72610d89c13684ab1a5b20478fbc63a1465ae760625a3b13a6b32829e40d9f3</citedby><cites>FETCH-LOGICAL-c370t-ef72610d89c13684ab1a5b20478fbc63a1465ae760625a3b13a6b32829e40d9f3</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.2015.08.022$$EHTML$$P50$$Gelsevier$$H</linktohtml><link.rule.ids>314,780,784,3550,27924,27925,45995</link.rule.ids></links><search><creatorcontrib>Safi, Rohollah</creatorcontrib><creatorcontrib>Ghasemi, Ali</creatorcontrib><creatorcontrib>Shoja-Razavi, Reza</creatorcontrib><creatorcontrib>Tavousi, Majid</creatorcontrib><title>The role of pH on the particle size and magnetic consequence of cobalt ferrite</title><title>Journal of magnetism and magnetic materials</title><description>Cobalt ferrite (CoFe2O4) nanoparticles with various size distributions were prepared by a chemical co-precipitation method at different pH condition from 8 to 13. The structural characterizations of the prepared samples were carried out using powder X-ray diffraction, Fourier transform infrared spectroscopy and field emission scanning electron microscope. The XRD results revealed that a single cubic CoFe2O4 phase with the average crystallite sizes of about 5–24nm were formed. Cation distribution occupancy in tetrahedral and octahedral sites were estimated by employing Rietveld refinement technique. The results showed that the whole series of samples contain a partial inverse spinel structure. FTIR measurements between 370 and 4000cm−1 confirmed the intrinsic cation vibrations of spinel structure of the samples. The room temperature magnetic properties of the samples have been examined using vibrating sample magnetometer. It is found that with increasing the pH of reaction, the magnetization and coercive field could be increased. The sample synthesized at pH~8 and 9 showed superparamagnetic behavior and highest coercive field up to 650Oe is attributed to the sample synthesized with pH~13.
•CoFe2O4 nanoparticles were prepared by co-precipitation method at different pH.•Τhe single cubic phase with the average crystallite sizes of 5–24nm were formed.•Cation distribution in tetrahedral and octahedral sites was estimated using XRD data.•The sample synthesized at pH~8 and 9 showed superparamagnetic behavior.•The crystallinity and crystallite size were increased by increasing the pH.</description><subject>Cations</subject><subject>Co-precipitation</subject><subject>Cobalt ferrite</subject><subject>Cobalt ferrites</subject><subject>Coercive force</subject><subject>Fourier transforms</subject><subject>Infrared spectroscopy</subject><subject>Magnetic nanoparticle</subject><subject>Magnetic properties</subject><subject>Rietveld refinement</subject><subject>Spinel</subject><issn>0304-8853</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2015</creationdate><recordtype>article</recordtype><recordid>eNp9kD9PwzAUxD2ARCl8ASaPLA3Pf-K4EguqgCIhWMpsOc4LOEriYKdI8OlJWmamJ53ud3p3hFwxyBgwddNkTdd1GQeWZ6Az4PyELECAXGmdizNynlIDAExqtSAvuw-kMbRIQ02HLQ09HSdlsHH0blKT_0Fq-4p29r3HSaMu9Ak_99i7A-NCaduR1hijH_GCnNa2TXj5d5fk7eF-t9munl8fnzZ3zysnChhXWBdcMaj02jGhtLQls3nJQRa6Lp0SlkmVWywUKJ5bUTJhVSm45muUUK1rsSTXx9whhumXNJrOJ4dta3sM-2SY5rlUSnI-WfnR6mJIKWJthug7G78NAzMPZhozD2bmwQxoAwfo9gjhVOLLYzTJ-bly5SO60VTB_4f_AuH-dUQ</recordid><startdate>20151215</startdate><enddate>20151215</enddate><creator>Safi, Rohollah</creator><creator>Ghasemi, Ali</creator><creator>Shoja-Razavi, Reza</creator><creator>Tavousi, Majid</creator><general>Elsevier B.V</general><scope>AAYXX</scope><scope>CITATION</scope><scope>7SR</scope><scope>7U5</scope><scope>8BQ</scope><scope>8FD</scope><scope>JG9</scope><scope>L7M</scope></search><sort><creationdate>20151215</creationdate><title>The role of pH on the particle size and magnetic consequence of cobalt ferrite</title><author>Safi, Rohollah ; Ghasemi, Ali ; Shoja-Razavi, Reza ; Tavousi, Majid</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c370t-ef72610d89c13684ab1a5b20478fbc63a1465ae760625a3b13a6b32829e40d9f3</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2015</creationdate><topic>Cations</topic><topic>Co-precipitation</topic><topic>Cobalt ferrite</topic><topic>Cobalt ferrites</topic><topic>Coercive force</topic><topic>Fourier transforms</topic><topic>Infrared spectroscopy</topic><topic>Magnetic nanoparticle</topic><topic>Magnetic properties</topic><topic>Rietveld refinement</topic><topic>Spinel</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Safi, Rohollah</creatorcontrib><creatorcontrib>Ghasemi, Ali</creatorcontrib><creatorcontrib>Shoja-Razavi, Reza</creatorcontrib><creatorcontrib>Tavousi, Majid</creatorcontrib><collection>CrossRef</collection><collection>Engineered Materials Abstracts</collection><collection>Solid State and Superconductivity Abstracts</collection><collection>METADEX</collection><collection>Technology Research Database</collection><collection>Materials Research Database</collection><collection>Advanced Technologies Database with Aerospace</collection><jtitle>Journal of magnetism and magnetic materials</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Safi, Rohollah</au><au>Ghasemi, Ali</au><au>Shoja-Razavi, Reza</au><au>Tavousi, Majid</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>The role of pH on the particle size and magnetic consequence of cobalt ferrite</atitle><jtitle>Journal of magnetism and magnetic materials</jtitle><date>2015-12-15</date><risdate>2015</risdate><volume>396</volume><spage>288</spage><epage>294</epage><pages>288-294</pages><issn>0304-8853</issn><abstract>Cobalt ferrite (CoFe2O4) nanoparticles with various size distributions were prepared by a chemical co-precipitation method at different pH condition from 8 to 13. The structural characterizations of the prepared samples were carried out using powder X-ray diffraction, Fourier transform infrared spectroscopy and field emission scanning electron microscope. The XRD results revealed that a single cubic CoFe2O4 phase with the average crystallite sizes of about 5–24nm were formed. Cation distribution occupancy in tetrahedral and octahedral sites were estimated by employing Rietveld refinement technique. The results showed that the whole series of samples contain a partial inverse spinel structure. FTIR measurements between 370 and 4000cm−1 confirmed the intrinsic cation vibrations of spinel structure of the samples. The room temperature magnetic properties of the samples have been examined using vibrating sample magnetometer. It is found that with increasing the pH of reaction, the magnetization and coercive field could be increased. The sample synthesized at pH~8 and 9 showed superparamagnetic behavior and highest coercive field up to 650Oe is attributed to the sample synthesized with pH~13.
•CoFe2O4 nanoparticles were prepared by co-precipitation method at different pH.•Τhe single cubic phase with the average crystallite sizes of 5–24nm were formed.•Cation distribution in tetrahedral and octahedral sites was estimated using XRD data.•The sample synthesized at pH~8 and 9 showed superparamagnetic behavior.•The crystallinity and crystallite size were increased by increasing the pH.</abstract><pub>Elsevier B.V</pub><doi>10.1016/j.jmmm.2015.08.022</doi><tpages>7</tpages></addata></record> |
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subjects | Cations Co-precipitation Cobalt ferrite Cobalt ferrites Coercive force Fourier transforms Infrared spectroscopy Magnetic nanoparticle Magnetic properties Rietveld refinement Spinel |
title | The role of pH on the particle size and magnetic consequence of cobalt ferrite |
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