Influence of ultrasonic treatment on magnetotransport of CrO2 granular compacts
The transport properties of ultrasonic-treated CrO2 particles are studied. The experimental results indicate that the ultrasonic treatment not only leads to an increase in the resistivity, but also reduces the saturation magnetization of CrO2 powders. These modifications are attributed to a change i...
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| Veröffentlicht in: | Journal of magnetism and magnetic materials 2005-01, Vol.285 (3), p.353-358 |
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| container_issue | 3 |
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| container_title | Journal of magnetism and magnetic materials |
| container_volume | 285 |
| creator | Fan, L.N. Chen, Y.J. Zhang, X.Y. Yao, D.L. |
| description | The transport properties of ultrasonic-treated CrO2 particles are studied. The experimental results indicate that the ultrasonic treatment not only leads to an increase in the resistivity, but also reduces the saturation magnetization of CrO2 powders. These modifications are attributed to a change in the surface state of the CrO2 particles. Furthermore, a modified surface state can yield a decreasing magnetoresistance of CrO2 granular compacts. XPS analysis provides supports that the surface nature of CrO2 particles is altered after ultrasonic treatment. The reduced saturation magnetization is related to the existence of a magnetic dead layer, which is estimated to be of a few nanometers thick. This work reveals that our ultrasonic technique is a method to control magnetotransport of granular materials by altering the surface state of the particles. |
| doi_str_mv | 10.1016/j.jmmm.2004.07.053 |
| format | Article |
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The experimental results indicate that the ultrasonic treatment not only leads to an increase in the resistivity, but also reduces the saturation magnetization of CrO2 powders. These modifications are attributed to a change in the surface state of the CrO2 particles. Furthermore, a modified surface state can yield a decreasing magnetoresistance of CrO2 granular compacts. XPS analysis provides supports that the surface nature of CrO2 particles is altered after ultrasonic treatment. The reduced saturation magnetization is related to the existence of a magnetic dead layer, which is estimated to be of a few nanometers thick. This work reveals that our ultrasonic technique is a method to control magnetotransport of granular materials by altering the surface state of the particles.</description><identifier>ISSN: 0304-8853</identifier><identifier>DOI: 10.1016/j.jmmm.2004.07.053</identifier><identifier>CODEN: JMMMDC</identifier><language>eng</language><publisher>Amsterdam: Elsevier B.V</publisher><subject>Condensed matter: electronic structure, electrical, magnetic, and optical properties ; Conductivity phenomena in semiconductors and insulators ; Electronic transport in condensed matter ; Exact sciences and technology ; Galvanomagnetic and other magnetotransport effects ; Magnetoresistance ; Physics ; Spin-dependent tunneling ; Ultrasound</subject><ispartof>Journal of magnetism and magnetic materials, 2005-01, Vol.285 (3), p.353-358</ispartof><rights>2004 Elsevier B.V.</rights><rights>2005 INIST-CNRS</rights><lds50>peer_reviewed</lds50><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c361t-e2d73988bc5260b74ce2c29e94cb5e1b6841a876567b2671946baae23188123e3</citedby><cites>FETCH-LOGICAL-c361t-e2d73988bc5260b74ce2c29e94cb5e1b6841a876567b2671946baae23188123e3</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.2004.07.053$$EHTML$$P50$$Gelsevier$$H</linktohtml><link.rule.ids>314,780,784,3550,4024,27923,27924,27925,45995</link.rule.ids><backlink>$$Uhttp://pascal-francis.inist.fr/vibad/index.php?action=getRecordDetail&idt=16416499$$DView record in Pascal Francis$$Hfree_for_read</backlink></links><search><creatorcontrib>Fan, L.N.</creatorcontrib><creatorcontrib>Chen, Y.J.</creatorcontrib><creatorcontrib>Zhang, X.Y.</creatorcontrib><creatorcontrib>Yao, D.L.</creatorcontrib><title>Influence of ultrasonic treatment on magnetotransport of CrO2 granular compacts</title><title>Journal of magnetism and magnetic materials</title><description>The transport properties of ultrasonic-treated CrO2 particles are studied. The experimental results indicate that the ultrasonic treatment not only leads to an increase in the resistivity, but also reduces the saturation magnetization of CrO2 powders. These modifications are attributed to a change in the surface state of the CrO2 particles. Furthermore, a modified surface state can yield a decreasing magnetoresistance of CrO2 granular compacts. XPS analysis provides supports that the surface nature of CrO2 particles is altered after ultrasonic treatment. The reduced saturation magnetization is related to the existence of a magnetic dead layer, which is estimated to be of a few nanometers thick. This work reveals that our ultrasonic technique is a method to control magnetotransport of granular materials by altering the surface state of the particles.</description><subject>Condensed matter: electronic structure, electrical, magnetic, and optical properties</subject><subject>Conductivity phenomena in semiconductors and insulators</subject><subject>Electronic transport in condensed matter</subject><subject>Exact sciences and technology</subject><subject>Galvanomagnetic and other magnetotransport effects</subject><subject>Magnetoresistance</subject><subject>Physics</subject><subject>Spin-dependent tunneling</subject><subject>Ultrasound</subject><issn>0304-8853</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2005</creationdate><recordtype>article</recordtype><recordid>eNp9kE1LxDAQQHNQcF39A5560VtrkqZpCl5k8WNhYS96Dml2uqS0SU1SwX9vyi54EwYGZt7MMA-hO4ILggl_7It-HMeCYswKXBe4Ki_QCpeY5UJU5RW6DqHHGBMm-Artt7YbZrAaMtdl8xC9Cs4anUUPKo5gY-ZsNqqjhehS04bJ-biwG7-n2TFV5kH5TLtxUjqGG3TZqSHA7Tmv0efry8fmPd_t37ab512uS05iDvRQl40Qra4ox23NNFBNG2iYbisgLReMKFHzitct5TVpGG-VAloSIQgtoVyjh9PeybuvGUKUowkahkFZcHOQVHDMMGMJpCdQexeCh05O3ozK_0iC5eJL9nLxJRdfEtcy-UpD9-ftKmg1dOlLbcLfJGcpmiZxTycO0qvfBrwM2iwyD8aDjvLgzH9nfgGoNoMl</recordid><startdate>200501</startdate><enddate>200501</enddate><creator>Fan, L.N.</creator><creator>Chen, Y.J.</creator><creator>Zhang, X.Y.</creator><creator>Yao, D.L.</creator><general>Elsevier B.V</general><general>Elsevier Science</general><scope>IQODW</scope><scope>AAYXX</scope><scope>CITATION</scope><scope>7QQ</scope><scope>7SP</scope><scope>7U5</scope><scope>8FD</scope><scope>JG9</scope><scope>L7M</scope></search><sort><creationdate>200501</creationdate><title>Influence of ultrasonic treatment on magnetotransport of CrO2 granular compacts</title><author>Fan, L.N. ; Chen, Y.J. ; Zhang, X.Y. ; Yao, D.L.</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c361t-e2d73988bc5260b74ce2c29e94cb5e1b6841a876567b2671946baae23188123e3</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2005</creationdate><topic>Condensed matter: electronic structure, electrical, magnetic, and optical properties</topic><topic>Conductivity phenomena in semiconductors and insulators</topic><topic>Electronic transport in condensed matter</topic><topic>Exact sciences and technology</topic><topic>Galvanomagnetic and other magnetotransport effects</topic><topic>Magnetoresistance</topic><topic>Physics</topic><topic>Spin-dependent tunneling</topic><topic>Ultrasound</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Fan, L.N.</creatorcontrib><creatorcontrib>Chen, Y.J.</creatorcontrib><creatorcontrib>Zhang, X.Y.</creatorcontrib><creatorcontrib>Yao, D.L.</creatorcontrib><collection>Pascal-Francis</collection><collection>CrossRef</collection><collection>Ceramic Abstracts</collection><collection>Electronics & Communications 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>Journal of magnetism and magnetic materials</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Fan, L.N.</au><au>Chen, Y.J.</au><au>Zhang, X.Y.</au><au>Yao, D.L.</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Influence of ultrasonic treatment on magnetotransport of CrO2 granular compacts</atitle><jtitle>Journal of magnetism and magnetic materials</jtitle><date>2005-01</date><risdate>2005</risdate><volume>285</volume><issue>3</issue><spage>353</spage><epage>358</epage><pages>353-358</pages><issn>0304-8853</issn><coden>JMMMDC</coden><abstract>The transport properties of ultrasonic-treated CrO2 particles are studied. 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| subjects | Condensed matter: electronic structure, electrical, magnetic, and optical properties Conductivity phenomena in semiconductors and insulators Electronic transport in condensed matter Exact sciences and technology Galvanomagnetic and other magnetotransport effects Magnetoresistance Physics Spin-dependent tunneling Ultrasound |
| title | Influence of ultrasonic treatment on magnetotransport of CrO2 granular compacts |
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