The transport properties of the mixed Ni–Cu ferrite
The transport properties of mixed Ni–Cu ferrite are measured as ac electrical conductivity and thermoelectric power with a function of temperature and frequency. The results obtained for these materials reveal a semiconductor–metallic–semiconductor behavior as Cu content increase. All studied compos...
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| Veröffentlicht in: | Journal of alloys and compounds 2008-10, Vol.465 (1), p.291-295 |
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| container_title | Journal of alloys and compounds |
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| creator | Roumaih, Kh |
| description | The transport properties of mixed Ni–Cu ferrite are measured as ac electrical conductivity and thermoelectric power with a function of temperature and frequency. The results obtained for these materials reveal a semiconductor–metallic–semiconductor behavior as Cu content increase. All studied compositions exhibit a transition with the conductivity versus temperature. This transition temperature is found to decrease with increasing Cu content. The dielectric parameter (
ɛ′) and loss (tan
δ) are measured for all the compositions Ni
1−
x
Cu
x
Fe
2O
4 with
x
=
0.0, 0.2, 0.5, 0.8, and 1.0 as a function of temperature at frequency range 200–100
kHz. The conduction mechanism is discussed on the basis of the hopping model. The thermoelectric power
φ is positive at room temperature for most samples, and the values of
φ tend towards negative values, indicating n-type behavior at high temperature. |
| doi_str_mv | 10.1016/j.jallcom.2007.10.073 |
| format | Article |
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ɛ′) and loss (tan
δ) are measured for all the compositions Ni
1−
x
Cu
x
Fe
2O
4 with
x
=
0.0, 0.2, 0.5, 0.8, and 1.0 as a function of temperature at frequency range 200–100
kHz. The conduction mechanism is discussed on the basis of the hopping model. The thermoelectric power
φ is positive at room temperature for most samples, and the values of
φ tend towards negative values, indicating n-type behavior at high temperature.</description><identifier>ISSN: 0925-8388</identifier><identifier>EISSN: 1873-4669</identifier><identifier>DOI: 10.1016/j.jallcom.2007.10.073</identifier><language>eng</language><publisher>Lausanne: Elsevier B.V</publisher><subject>Condensed matter: electronic structure, electrical, magnetic, and optical properties ; Dielectric constant ; Dielectric loss and relaxation ; Dielectric properties of solids and liquids ; Dielectrics, piezoelectrics, and ferroelectrics and their properties ; Electrical conductivity ; Electronic transport in condensed matter ; Exact sciences and technology ; Mixed conductivity and conductivity transitions ; Ni–Cu ferrite ; Permittivity (dielectric function) ; Physics ; Thermoelectric power ; Transport properties</subject><ispartof>Journal of alloys and compounds, 2008-10, Vol.465 (1), p.291-295</ispartof><rights>2007 Elsevier B.V.</rights><rights>2008 INIST-CNRS</rights><lds50>peer_reviewed</lds50><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c370t-65e81d3f042f21b47e1a5075681a1a29a15bba4d8f704b94ad440f394f0d4f323</citedby><cites>FETCH-LOGICAL-c370t-65e81d3f042f21b47e1a5075681a1a29a15bba4d8f704b94ad440f394f0d4f323</cites></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktohtml>$$Uhttps://www.sciencedirect.com/science/article/pii/S0925838807020208$$EHTML$$P50$$Gelsevier$$H</linktohtml><link.rule.ids>314,776,780,3537,27901,27902,65306</link.rule.ids><backlink>$$Uhttp://pascal-francis.inist.fr/vibad/index.php?action=getRecordDetail&idt=20697691$$DView record in Pascal Francis$$Hfree_for_read</backlink></links><search><creatorcontrib>Roumaih, Kh</creatorcontrib><title>The transport properties of the mixed Ni–Cu ferrite</title><title>Journal of alloys and compounds</title><description>The transport properties of mixed Ni–Cu ferrite are measured as ac electrical conductivity and thermoelectric power with a function of temperature and frequency. The results obtained for these materials reveal a semiconductor–metallic–semiconductor behavior as Cu content increase. All studied compositions exhibit a transition with the conductivity versus temperature. This transition temperature is found to decrease with increasing Cu content. The dielectric parameter (
ɛ′) and loss (tan
δ) are measured for all the compositions Ni
1−
x
Cu
x
Fe
2O
4 with
x
=
0.0, 0.2, 0.5, 0.8, and 1.0 as a function of temperature at frequency range 200–100
kHz. The conduction mechanism is discussed on the basis of the hopping model. The thermoelectric power
φ is positive at room temperature for most samples, and the values of
φ tend towards negative values, indicating n-type behavior at high temperature.</description><subject>Condensed matter: electronic structure, electrical, magnetic, and optical properties</subject><subject>Dielectric constant</subject><subject>Dielectric loss and relaxation</subject><subject>Dielectric properties of solids and liquids</subject><subject>Dielectrics, piezoelectrics, and ferroelectrics and their properties</subject><subject>Electrical conductivity</subject><subject>Electronic transport in condensed matter</subject><subject>Exact sciences and technology</subject><subject>Mixed conductivity and conductivity transitions</subject><subject>Ni–Cu ferrite</subject><subject>Permittivity (dielectric function)</subject><subject>Physics</subject><subject>Thermoelectric power</subject><subject>Transport properties</subject><issn>0925-8388</issn><issn>1873-4669</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2008</creationdate><recordtype>article</recordtype><recordid>eNqFkMtKxDAUhoMoOI4-gtCN7lpPLm3alcjgDQbdjOuQpieY0k5r0hHd-Q6-oU9ihhncujrwn_8_l4-QcwoZBVpctVmru84MfcYAZNQykPyAzGgpeSqKojokM6hYnpa8LI_JSQgtANCK0xnJV6-YTF6vwzj4KRn9MKKfHIZksMkUe737wCZ5cj9f34tNYtF7N-EpObK6C3i2r3Pycne7Wjyky-f7x8XNMjVcwpQWOZa04RYEs4zWQiLVOci8KKmmmlWa5nWtRVNaCaKuhG6EAMsrYaERljM-J5e7ufGutw2GSfUuGOw6vcZhExTPGeWMFdGY74zGDyF4tGr0rtf-U1FQW0iqVXtIagtpK0dIMXexX6CD0Z2NIIwLf2EGRSWLikbf9c6H8dt3h14F43BtsHEezaSawf2z6RcxYX9o</recordid><startdate>20081006</startdate><enddate>20081006</enddate><creator>Roumaih, Kh</creator><general>Elsevier B.V</general><general>Elsevier</general><scope>IQODW</scope><scope>AAYXX</scope><scope>CITATION</scope><scope>8BQ</scope><scope>8FD</scope><scope>JG9</scope></search><sort><creationdate>20081006</creationdate><title>The transport properties of the mixed Ni–Cu ferrite</title><author>Roumaih, Kh</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c370t-65e81d3f042f21b47e1a5075681a1a29a15bba4d8f704b94ad440f394f0d4f323</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2008</creationdate><topic>Condensed matter: electronic structure, electrical, magnetic, and optical properties</topic><topic>Dielectric constant</topic><topic>Dielectric loss and relaxation</topic><topic>Dielectric properties of solids and liquids</topic><topic>Dielectrics, piezoelectrics, and ferroelectrics and their properties</topic><topic>Electrical conductivity</topic><topic>Electronic transport in condensed matter</topic><topic>Exact sciences and technology</topic><topic>Mixed conductivity and conductivity transitions</topic><topic>Ni–Cu ferrite</topic><topic>Permittivity (dielectric function)</topic><topic>Physics</topic><topic>Thermoelectric power</topic><topic>Transport properties</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Roumaih, Kh</creatorcontrib><collection>Pascal-Francis</collection><collection>CrossRef</collection><collection>METADEX</collection><collection>Technology Research Database</collection><collection>Materials Research Database</collection><jtitle>Journal of alloys and compounds</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Roumaih, Kh</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>The transport properties of the mixed Ni–Cu ferrite</atitle><jtitle>Journal of alloys and compounds</jtitle><date>2008-10-06</date><risdate>2008</risdate><volume>465</volume><issue>1</issue><spage>291</spage><epage>295</epage><pages>291-295</pages><issn>0925-8388</issn><eissn>1873-4669</eissn><abstract>The transport properties of mixed Ni–Cu ferrite are measured as ac electrical conductivity and thermoelectric power with a function of temperature and frequency. The results obtained for these materials reveal a semiconductor–metallic–semiconductor behavior as Cu content increase. All studied compositions exhibit a transition with the conductivity versus temperature. This transition temperature is found to decrease with increasing Cu content. The dielectric parameter (
ɛ′) and loss (tan
δ) are measured for all the compositions Ni
1−
x
Cu
x
Fe
2O
4 with
x
=
0.0, 0.2, 0.5, 0.8, and 1.0 as a function of temperature at frequency range 200–100
kHz. The conduction mechanism is discussed on the basis of the hopping model. The thermoelectric power
φ is positive at room temperature for most samples, and the values of
φ tend towards negative values, indicating n-type behavior at high temperature.</abstract><cop>Lausanne</cop><pub>Elsevier B.V</pub><doi>10.1016/j.jallcom.2007.10.073</doi><tpages>5</tpages></addata></record> |
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| identifier | ISSN: 0925-8388 |
| ispartof | Journal of alloys and compounds, 2008-10, Vol.465 (1), p.291-295 |
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| language | eng |
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| source | Elsevier ScienceDirect Journals |
| subjects | Condensed matter: electronic structure, electrical, magnetic, and optical properties Dielectric constant Dielectric loss and relaxation Dielectric properties of solids and liquids Dielectrics, piezoelectrics, and ferroelectrics and their properties Electrical conductivity Electronic transport in condensed matter Exact sciences and technology Mixed conductivity and conductivity transitions Ni–Cu ferrite Permittivity (dielectric function) Physics Thermoelectric power Transport properties |
| title | The transport properties of the mixed Ni–Cu ferrite |
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