Magnetic properties of Co1+yAl2−yO4–SiO2 nanocomposites synthesized by sol–gel method
Nanocomposites made of magnetic spinel oxide Co 1+y Al 2−y O 4 particles dispersed in an amorphous SiO 2 matrix were synthesized by a sol–gel technique. Samples with various mass fractions of Co 1+y Al 2−y O 4 in composite x , and with various Co concentrations in spinel y were studied. The grain si...
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| Veröffentlicht in: | Journal of sol-gel science and technology 2012-07, Vol.63 (1), p.56-64 |
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| creator | MILIVOJEVIC, Dušan BABIC-STOJIC, Branka JOKANOVIC, Vukoman JAGLICIC, Zvonko BRANKOVIC, Dušan JOVIC, Nataša CUPIC, Svetlana KOJIC, Dušan |
| description | Nanocomposites made of magnetic spinel oxide Co
1+y
Al
2−y
O
4
particles dispersed in an amorphous SiO
2
matrix were synthesized by a sol–gel technique. Samples with various mass fractions of Co
1+y
Al
2−y
O
4
in composite
x
, and with various Co concentrations in spinel
y
were studied. The grain sizes were below 100 nm with a large size distribution. The paper represents thorough investigation of magnetic properties, but special attention was given to peculiar effects and low temperature magnetic frozen states. Magnetic measurements reveal multiple magnetic ground states at the lowest temperature. The frequency dependent
ac
susceptibility measurements indicate spin-glass behavior of these ground states at low temperatures. The samples, with higher concentration
x
of Co
1+y
Al
2−y
O
4
in SiO
2
, showed very similar Curie–Weiss paramagnetic behavior with antiferromagnetically interacting Co ions (
θ
≈ −100 K). Other samples, with lower
x
, showed complex behavior, spin-glass magnetic freezing at the lowest temperatures and lower absolute value of
θ
and consequently lower exchange constant. |
| doi_str_mv | 10.1007/s10971-012-2763-1 |
| format | Article |
| fullrecord | <record><control><sourceid>proquest_cross</sourceid><recordid>TN_cdi_proquest_miscellaneous_1221867534</recordid><sourceformat>XML</sourceformat><sourcesystem>PC</sourcesystem><sourcerecordid>2259539361</sourcerecordid><originalsourceid>FETCH-LOGICAL-c294t-4da89f56ebb05c290a59f8802ff0389a44ec569bbd7f18c629c30fb86a46f25d3</originalsourceid><addsrcrecordid>eNqFkc-KFDEQh4MoOK4-gLcGEQRprVT-H5dBXWFlDurJQ0ink9leejpj0nNoTx49u2-4T2KGWRQE8VRQ9dWPKj5CnlJ4RQHU60LBKNoCxRaVZC29R1ZUKNZyzeV9sgKDugUF6iF5VMo1AAhO1Yp8-eC2U5gH3-xz2oc8D6E0KTbrRF8u5yPe_vi5bPjt95uPwwabyU3Jp90-lWGuXFmm-SqU4Vvom25pShoruA1jswvzVeofkwfRjSU8uatn5PPbN5_WF-3l5t379fll69HwueW90yYKGboORG2BEyZqDRgjMG0c58ELabquV5FqL9F4BrHT0nEZUfTsjLw45dYXvh5Cme1uKD6Mo5tCOhRLEamWSjD-fxQ0IjIKR_TZX-h1OuSpPmIRhRHMMEkrRU-Uz6mUHKLd52Hn8lKj7NGMPZmx1Yw9mrHHned3ya54N8bsJj-U34soweiqrnJ44kodTduQ_1zw7_BfRIifKA</addsrcrecordid><sourcetype>Aggregation Database</sourcetype><iscdi>true</iscdi><recordtype>article</recordtype><pqid>2259539361</pqid></control><display><type>article</type><title>Magnetic properties of Co1+yAl2−yO4–SiO2 nanocomposites synthesized by sol–gel method</title><source>SpringerLink Journals - AutoHoldings</source><creator>MILIVOJEVIC, Dušan ; BABIC-STOJIC, Branka ; JOKANOVIC, Vukoman ; JAGLICIC, Zvonko ; BRANKOVIC, Dušan ; JOVIC, Nataša ; CUPIC, Svetlana ; KOJIC, Dušan</creator><creatorcontrib>MILIVOJEVIC, Dušan ; BABIC-STOJIC, Branka ; JOKANOVIC, Vukoman ; JAGLICIC, Zvonko ; BRANKOVIC, Dušan ; JOVIC, Nataša ; CUPIC, Svetlana ; KOJIC, Dušan</creatorcontrib><description>Nanocomposites made of magnetic spinel oxide Co
1+y
Al
2−y
O
4
particles dispersed in an amorphous SiO
2
matrix were synthesized by a sol–gel technique. Samples with various mass fractions of Co
1+y
Al
2−y
O
4
in composite
x
, and with various Co concentrations in spinel
y
were studied. The grain sizes were below 100 nm with a large size distribution. The paper represents thorough investigation of magnetic properties, but special attention was given to peculiar effects and low temperature magnetic frozen states. Magnetic measurements reveal multiple magnetic ground states at the lowest temperature. The frequency dependent
ac
susceptibility measurements indicate spin-glass behavior of these ground states at low temperatures. The samples, with higher concentration
x
of Co
1+y
Al
2−y
O
4
in SiO
2
, showed very similar Curie–Weiss paramagnetic behavior with antiferromagnetically interacting Co ions (
θ
≈ −100 K). Other samples, with lower
x
, showed complex behavior, spin-glass magnetic freezing at the lowest temperatures and lower absolute value of
θ
and consequently lower exchange constant.</description><identifier>ISSN: 0928-0707</identifier><identifier>EISSN: 1573-4846</identifier><identifier>DOI: 10.1007/s10971-012-2763-1</identifier><language>eng</language><publisher>Boston: Springer US</publisher><subject>Antiferromagnetism ; Ceramics ; Chemistry ; Chemistry and Materials Science ; Colloidal gels. Colloidal sols ; Colloidal state and disperse state ; Composites ; Exact sciences and technology ; Freezing ; Frozen ; Frozen ground ; General and physical chemistry ; Glass ; Grain size ; Grain size distribution ; Ground state ; Inorganic Chemistry ; Magnetic measurement ; Magnetic permeability ; Magnetic properties ; Magnetism ; Materials Science ; Nanocomposites ; Nanotechnology ; Natural Materials ; Optical and Electronic Materials ; Original Paper ; Particle size distribution ; Silicon dioxide ; Sol-gel processes ; Spin glasses ; Spinel ; Synthesis ; Temperature dependence</subject><ispartof>Journal of sol-gel science and technology, 2012-07, Vol.63 (1), p.56-64</ispartof><rights>Springer Science+Business Media, LLC 2012</rights><rights>2015 INIST-CNRS</rights><rights>Journal of Sol-Gel Science and Technology is a copyright of Springer, (2012). All Rights Reserved.</rights><lds50>peer_reviewed</lds50><woscitedreferencessubscribed>false</woscitedreferencessubscribed><cites>FETCH-LOGICAL-c294t-4da89f56ebb05c290a59f8802ff0389a44ec569bbd7f18c629c30fb86a46f25d3</cites></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktopdf>$$Uhttps://link.springer.com/content/pdf/10.1007/s10971-012-2763-1$$EPDF$$P50$$Gspringer$$H</linktopdf><linktohtml>$$Uhttps://link.springer.com/10.1007/s10971-012-2763-1$$EHTML$$P50$$Gspringer$$H</linktohtml><link.rule.ids>314,780,784,27924,27925,41488,42557,51319</link.rule.ids><backlink>$$Uhttp://pascal-francis.inist.fr/vibad/index.php?action=getRecordDetail&idt=26098573$$DView record in Pascal Francis$$Hfree_for_read</backlink></links><search><creatorcontrib>MILIVOJEVIC, Dušan</creatorcontrib><creatorcontrib>BABIC-STOJIC, Branka</creatorcontrib><creatorcontrib>JOKANOVIC, Vukoman</creatorcontrib><creatorcontrib>JAGLICIC, Zvonko</creatorcontrib><creatorcontrib>BRANKOVIC, Dušan</creatorcontrib><creatorcontrib>JOVIC, Nataša</creatorcontrib><creatorcontrib>CUPIC, Svetlana</creatorcontrib><creatorcontrib>KOJIC, Dušan</creatorcontrib><title>Magnetic properties of Co1+yAl2−yO4–SiO2 nanocomposites synthesized by sol–gel method</title><title>Journal of sol-gel science and technology</title><addtitle>J Sol-Gel Sci Technol</addtitle><description>Nanocomposites made of magnetic spinel oxide Co
1+y
Al
2−y
O
4
particles dispersed in an amorphous SiO
2
matrix were synthesized by a sol–gel technique. Samples with various mass fractions of Co
1+y
Al
2−y
O
4
in composite
x
, and with various Co concentrations in spinel
y
were studied. The grain sizes were below 100 nm with a large size distribution. The paper represents thorough investigation of magnetic properties, but special attention was given to peculiar effects and low temperature magnetic frozen states. Magnetic measurements reveal multiple magnetic ground states at the lowest temperature. The frequency dependent
ac
susceptibility measurements indicate spin-glass behavior of these ground states at low temperatures. The samples, with higher concentration
x
of Co
1+y
Al
2−y
O
4
in SiO
2
, showed very similar Curie–Weiss paramagnetic behavior with antiferromagnetically interacting Co ions (
θ
≈ −100 K). Other samples, with lower
x
, showed complex behavior, spin-glass magnetic freezing at the lowest temperatures and lower absolute value of
θ
and consequently lower exchange constant.</description><subject>Antiferromagnetism</subject><subject>Ceramics</subject><subject>Chemistry</subject><subject>Chemistry and Materials Science</subject><subject>Colloidal gels. Colloidal sols</subject><subject>Colloidal state and disperse state</subject><subject>Composites</subject><subject>Exact sciences and technology</subject><subject>Freezing</subject><subject>Frozen</subject><subject>Frozen ground</subject><subject>General and physical chemistry</subject><subject>Glass</subject><subject>Grain size</subject><subject>Grain size distribution</subject><subject>Ground state</subject><subject>Inorganic Chemistry</subject><subject>Magnetic measurement</subject><subject>Magnetic permeability</subject><subject>Magnetic properties</subject><subject>Magnetism</subject><subject>Materials Science</subject><subject>Nanocomposites</subject><subject>Nanotechnology</subject><subject>Natural Materials</subject><subject>Optical and Electronic Materials</subject><subject>Original Paper</subject><subject>Particle size distribution</subject><subject>Silicon dioxide</subject><subject>Sol-gel processes</subject><subject>Spin glasses</subject><subject>Spinel</subject><subject>Synthesis</subject><subject>Temperature dependence</subject><issn>0928-0707</issn><issn>1573-4846</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2012</creationdate><recordtype>article</recordtype><sourceid>AFKRA</sourceid><sourceid>BENPR</sourceid><sourceid>CCPQU</sourceid><sourceid>DWQXO</sourceid><recordid>eNqFkc-KFDEQh4MoOK4-gLcGEQRprVT-H5dBXWFlDurJQ0ink9leejpj0nNoTx49u2-4T2KGWRQE8VRQ9dWPKj5CnlJ4RQHU60LBKNoCxRaVZC29R1ZUKNZyzeV9sgKDugUF6iF5VMo1AAhO1Yp8-eC2U5gH3-xz2oc8D6E0KTbrRF8u5yPe_vi5bPjt95uPwwabyU3Jp90-lWGuXFmm-SqU4Vvom25pShoruA1jswvzVeofkwfRjSU8uatn5PPbN5_WF-3l5t379fll69HwueW90yYKGboORG2BEyZqDRgjMG0c58ELabquV5FqL9F4BrHT0nEZUfTsjLw45dYXvh5Cme1uKD6Mo5tCOhRLEamWSjD-fxQ0IjIKR_TZX-h1OuSpPmIRhRHMMEkrRU-Uz6mUHKLd52Hn8lKj7NGMPZmx1Yw9mrHHned3ya54N8bsJj-U34soweiqrnJ44kodTduQ_1zw7_BfRIifKA</recordid><startdate>20120701</startdate><enddate>20120701</enddate><creator>MILIVOJEVIC, Dušan</creator><creator>BABIC-STOJIC, Branka</creator><creator>JOKANOVIC, Vukoman</creator><creator>JAGLICIC, Zvonko</creator><creator>BRANKOVIC, Dušan</creator><creator>JOVIC, Nataša</creator><creator>CUPIC, Svetlana</creator><creator>KOJIC, Dušan</creator><general>Springer US</general><general>Springer</general><general>Springer Nature B.V</general><scope>IQODW</scope><scope>AAYXX</scope><scope>CITATION</scope><scope>8FE</scope><scope>8FG</scope><scope>ABJCF</scope><scope>AFKRA</scope><scope>BENPR</scope><scope>BGLVJ</scope><scope>CCPQU</scope><scope>D1I</scope><scope>DWQXO</scope><scope>HCIFZ</scope><scope>KB.</scope><scope>L6V</scope><scope>M7S</scope><scope>PDBOC</scope><scope>PQEST</scope><scope>PQQKQ</scope><scope>PQUKI</scope><scope>PRINS</scope><scope>PTHSS</scope><scope>7SR</scope><scope>8FD</scope><scope>JG9</scope></search><sort><creationdate>20120701</creationdate><title>Magnetic properties of Co1+yAl2−yO4–SiO2 nanocomposites synthesized by sol–gel method</title><author>MILIVOJEVIC, Dušan ; BABIC-STOJIC, Branka ; JOKANOVIC, Vukoman ; JAGLICIC, Zvonko ; BRANKOVIC, Dušan ; JOVIC, Nataša ; CUPIC, Svetlana ; KOJIC, Dušan</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c294t-4da89f56ebb05c290a59f8802ff0389a44ec569bbd7f18c629c30fb86a46f25d3</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2012</creationdate><topic>Antiferromagnetism</topic><topic>Ceramics</topic><topic>Chemistry</topic><topic>Chemistry and Materials Science</topic><topic>Colloidal gels. Colloidal sols</topic><topic>Colloidal state and disperse state</topic><topic>Composites</topic><topic>Exact sciences and technology</topic><topic>Freezing</topic><topic>Frozen</topic><topic>Frozen ground</topic><topic>General and physical chemistry</topic><topic>Glass</topic><topic>Grain size</topic><topic>Grain size distribution</topic><topic>Ground state</topic><topic>Inorganic Chemistry</topic><topic>Magnetic measurement</topic><topic>Magnetic permeability</topic><topic>Magnetic properties</topic><topic>Magnetism</topic><topic>Materials Science</topic><topic>Nanocomposites</topic><topic>Nanotechnology</topic><topic>Natural Materials</topic><topic>Optical and Electronic Materials</topic><topic>Original Paper</topic><topic>Particle size distribution</topic><topic>Silicon dioxide</topic><topic>Sol-gel processes</topic><topic>Spin glasses</topic><topic>Spinel</topic><topic>Synthesis</topic><topic>Temperature dependence</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>MILIVOJEVIC, Dušan</creatorcontrib><creatorcontrib>BABIC-STOJIC, Branka</creatorcontrib><creatorcontrib>JOKANOVIC, Vukoman</creatorcontrib><creatorcontrib>JAGLICIC, Zvonko</creatorcontrib><creatorcontrib>BRANKOVIC, Dušan</creatorcontrib><creatorcontrib>JOVIC, Nataša</creatorcontrib><creatorcontrib>CUPIC, Svetlana</creatorcontrib><creatorcontrib>KOJIC, Dušan</creatorcontrib><collection>Pascal-Francis</collection><collection>CrossRef</collection><collection>ProQuest SciTech Collection</collection><collection>ProQuest Technology Collection</collection><collection>Materials Science & Engineering Collection</collection><collection>ProQuest Central UK/Ireland</collection><collection>ProQuest Central</collection><collection>Technology Collection</collection><collection>ProQuest One Community College</collection><collection>ProQuest Materials Science Collection</collection><collection>ProQuest Central Korea</collection><collection>SciTech Premium Collection</collection><collection>Materials Science Database</collection><collection>ProQuest Engineering Collection</collection><collection>Engineering Database</collection><collection>Materials Science Collection</collection><collection>ProQuest One Academic Eastern Edition (DO NOT USE)</collection><collection>ProQuest One Academic</collection><collection>ProQuest One Academic UKI Edition</collection><collection>ProQuest Central China</collection><collection>Engineering Collection</collection><collection>Engineered Materials Abstracts</collection><collection>Technology Research Database</collection><collection>Materials Research Database</collection><jtitle>Journal of sol-gel science and technology</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>MILIVOJEVIC, Dušan</au><au>BABIC-STOJIC, Branka</au><au>JOKANOVIC, Vukoman</au><au>JAGLICIC, Zvonko</au><au>BRANKOVIC, Dušan</au><au>JOVIC, Nataša</au><au>CUPIC, Svetlana</au><au>KOJIC, Dušan</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Magnetic properties of Co1+yAl2−yO4–SiO2 nanocomposites synthesized by sol–gel method</atitle><jtitle>Journal of sol-gel science and technology</jtitle><stitle>J Sol-Gel Sci Technol</stitle><date>2012-07-01</date><risdate>2012</risdate><volume>63</volume><issue>1</issue><spage>56</spage><epage>64</epage><pages>56-64</pages><issn>0928-0707</issn><eissn>1573-4846</eissn><abstract>Nanocomposites made of magnetic spinel oxide Co
1+y
Al
2−y
O
4
particles dispersed in an amorphous SiO
2
matrix were synthesized by a sol–gel technique. Samples with various mass fractions of Co
1+y
Al
2−y
O
4
in composite
x
, and with various Co concentrations in spinel
y
were studied. The grain sizes were below 100 nm with a large size distribution. The paper represents thorough investigation of magnetic properties, but special attention was given to peculiar effects and low temperature magnetic frozen states. Magnetic measurements reveal multiple magnetic ground states at the lowest temperature. The frequency dependent
ac
susceptibility measurements indicate spin-glass behavior of these ground states at low temperatures. The samples, with higher concentration
x
of Co
1+y
Al
2−y
O
4
in SiO
2
, showed very similar Curie–Weiss paramagnetic behavior with antiferromagnetically interacting Co ions (
θ
≈ −100 K). Other samples, with lower
x
, showed complex behavior, spin-glass magnetic freezing at the lowest temperatures and lower absolute value of
θ
and consequently lower exchange constant.</abstract><cop>Boston</cop><pub>Springer US</pub><doi>10.1007/s10971-012-2763-1</doi><tpages>9</tpages></addata></record> |
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| issn | 0928-0707 1573-4846 |
| language | eng |
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| source | SpringerLink Journals - AutoHoldings |
| subjects | Antiferromagnetism Ceramics Chemistry Chemistry and Materials Science Colloidal gels. Colloidal sols Colloidal state and disperse state Composites Exact sciences and technology Freezing Frozen Frozen ground General and physical chemistry Glass Grain size Grain size distribution Ground state Inorganic Chemistry Magnetic measurement Magnetic permeability Magnetic properties Magnetism Materials Science Nanocomposites Nanotechnology Natural Materials Optical and Electronic Materials Original Paper Particle size distribution Silicon dioxide Sol-gel processes Spin glasses Spinel Synthesis Temperature dependence |
| title | Magnetic properties of Co1+yAl2−yO4–SiO2 nanocomposites synthesized by sol–gel method |
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