Studies on dielectric and electrical properties of Ruddlesden-Popper oxide Sr^sub 2^SnO^sub 4
Ruddlesden Popper (RP) oxide Sr2SnO4 has been synthesized via a solid state reaction route by calcination at 1000 °C for 8 h. The Rietveld refinement of X-ray diffraction (XRD) pattern suggested tetragonal structure; I4/mmm space group and unit cell parameters a = b = 4.05084(5) Å, c = 12.59040(2) Å...
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| Veröffentlicht in: | Materials letters 2018-09, Vol.227, p.100 |
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| creator | Kumar, Upendra Upadhyay, Shail |
| description | Ruddlesden Popper (RP) oxide Sr2SnO4 has been synthesized via a solid state reaction route by calcination at 1000 °C for 8 h. The Rietveld refinement of X-ray diffraction (XRD) pattern suggested tetragonal structure; I4/mmm space group and unit cell parameters a = b = 4.05084(5) Å, c = 12.59040(2) Å. Dielectric properties, electric modulus and ac conductivity have been studied as a function of both frequency (20 Hz–2 MHz) and temperature (70–600 °C) in air atmosphere. Dielectric constant and dissipation factor remains constant upto 600 °C above 1 KHz. AC conduction mechanism has been explained using Johnscher’s Power law. The value of the activation energy for conduction, Econd (obtained from DC conductivity) and dielectric relaxation, Erelax (obtained from modulus) is found to be the same indicating similar mechanism for both the processes. Based on the numerical value of activation energy, the conduction and relaxation processes are attributed to transfer of electron from Sn2+ to Sn4+ through the thermally assisted quantum mechanical tunneling process. |
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The Rietveld refinement of X-ray diffraction (XRD) pattern suggested tetragonal structure; I4/mmm space group and unit cell parameters a = b = 4.05084(5) Å, c = 12.59040(2) Å. Dielectric properties, electric modulus and ac conductivity have been studied as a function of both frequency (20 Hz–2 MHz) and temperature (70–600 °C) in air atmosphere. Dielectric constant and dissipation factor remains constant upto 600 °C above 1 KHz. AC conduction mechanism has been explained using Johnscher’s Power law. The value of the activation energy for conduction, Econd (obtained from DC conductivity) and dielectric relaxation, Erelax (obtained from modulus) is found to be the same indicating similar mechanism for both the processes. Based on the numerical value of activation energy, the conduction and relaxation processes are attributed to transfer of electron from Sn2+ to Sn4+ through the thermally assisted quantum mechanical tunneling process.</description><identifier>ISSN: 0167-577X</identifier><identifier>EISSN: 1873-4979</identifier><language>eng</language><publisher>Amsterdam: Elsevier BV</publisher><subject>Activation energy ; Chemical synthesis ; Dielectric properties ; Dielectric relaxation ; Diffraction patterns ; Dissipation factor ; Electric properties ; Electrical properties ; Electrical resistivity ; Heat conductivity ; Materials science ; Quantum mechanics ; Unit cell ; X-ray diffraction</subject><ispartof>Materials letters, 2018-09, Vol.227, p.100</ispartof><rights>Copyright Elsevier BV Sep 15, 2018</rights><lds50>peer_reviewed</lds50><woscitedreferencessubscribed>false</woscitedreferencessubscribed></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><link.rule.ids>314,776,780</link.rule.ids></links><search><creatorcontrib>Kumar, Upendra</creatorcontrib><creatorcontrib>Upadhyay, Shail</creatorcontrib><title>Studies on dielectric and electrical properties of Ruddlesden-Popper oxide Sr^sub 2^SnO^sub 4</title><title>Materials letters</title><description>Ruddlesden Popper (RP) oxide Sr2SnO4 has been synthesized via a solid state reaction route by calcination at 1000 °C for 8 h. The Rietveld refinement of X-ray diffraction (XRD) pattern suggested tetragonal structure; I4/mmm space group and unit cell parameters a = b = 4.05084(5) Å, c = 12.59040(2) Å. Dielectric properties, electric modulus and ac conductivity have been studied as a function of both frequency (20 Hz–2 MHz) and temperature (70–600 °C) in air atmosphere. Dielectric constant and dissipation factor remains constant upto 600 °C above 1 KHz. AC conduction mechanism has been explained using Johnscher’s Power law. The value of the activation energy for conduction, Econd (obtained from DC conductivity) and dielectric relaxation, Erelax (obtained from modulus) is found to be the same indicating similar mechanism for both the processes. Based on the numerical value of activation energy, the conduction and relaxation processes are attributed to transfer of electron from Sn2+ to Sn4+ through the thermally assisted quantum mechanical tunneling process.</description><subject>Activation energy</subject><subject>Chemical synthesis</subject><subject>Dielectric properties</subject><subject>Dielectric relaxation</subject><subject>Diffraction patterns</subject><subject>Dissipation factor</subject><subject>Electric properties</subject><subject>Electrical properties</subject><subject>Electrical resistivity</subject><subject>Heat conductivity</subject><subject>Materials science</subject><subject>Quantum mechanics</subject><subject>Unit cell</subject><subject>X-ray diffraction</subject><issn>0167-577X</issn><issn>1873-4979</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2018</creationdate><recordtype>article</recordtype><recordid>eNqNjL0KwjAYRYMoWH_e4QPnQNqmJp1FcVOsg4sttUmhJSQ1acDHN4juTvdezuFOUBRzlmKas3yKIhJvGc4Yu83RwrmeEEJzQiN0L0YvOunAaAipZDParoFaC_iNWsFgzSDt-PFauHghlHRCanw2QwBgXp2QUNjS-QckZaFPn0ZXaNbWysn1N5doc9hfd0ccDp9eurHqjbc6oCohnPM4oxlP_7PeTh9FEA</recordid><startdate>20180915</startdate><enddate>20180915</enddate><creator>Kumar, Upendra</creator><creator>Upadhyay, Shail</creator><general>Elsevier BV</general><scope>7SR</scope><scope>8BQ</scope><scope>8FD</scope><scope>JG9</scope></search><sort><creationdate>20180915</creationdate><title>Studies on dielectric and electrical properties of Ruddlesden-Popper oxide Sr^sub 2^SnO^sub 4</title><author>Kumar, Upendra ; Upadhyay, Shail</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-proquest_journals_20888154583</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2018</creationdate><topic>Activation energy</topic><topic>Chemical synthesis</topic><topic>Dielectric properties</topic><topic>Dielectric relaxation</topic><topic>Diffraction patterns</topic><topic>Dissipation factor</topic><topic>Electric properties</topic><topic>Electrical properties</topic><topic>Electrical resistivity</topic><topic>Heat conductivity</topic><topic>Materials science</topic><topic>Quantum mechanics</topic><topic>Unit cell</topic><topic>X-ray diffraction</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Kumar, Upendra</creatorcontrib><creatorcontrib>Upadhyay, Shail</creatorcontrib><collection>Engineered Materials Abstracts</collection><collection>METADEX</collection><collection>Technology Research Database</collection><collection>Materials Research Database</collection><jtitle>Materials letters</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Kumar, Upendra</au><au>Upadhyay, Shail</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Studies on dielectric and electrical properties of Ruddlesden-Popper oxide Sr^sub 2^SnO^sub 4</atitle><jtitle>Materials letters</jtitle><date>2018-09-15</date><risdate>2018</risdate><volume>227</volume><spage>100</spage><pages>100-</pages><issn>0167-577X</issn><eissn>1873-4979</eissn><abstract>Ruddlesden Popper (RP) oxide Sr2SnO4 has been synthesized via a solid state reaction route by calcination at 1000 °C for 8 h. The Rietveld refinement of X-ray diffraction (XRD) pattern suggested tetragonal structure; I4/mmm space group and unit cell parameters a = b = 4.05084(5) Å, c = 12.59040(2) Å. Dielectric properties, electric modulus and ac conductivity have been studied as a function of both frequency (20 Hz–2 MHz) and temperature (70–600 °C) in air atmosphere. Dielectric constant and dissipation factor remains constant upto 600 °C above 1 KHz. AC conduction mechanism has been explained using Johnscher’s Power law. The value of the activation energy for conduction, Econd (obtained from DC conductivity) and dielectric relaxation, Erelax (obtained from modulus) is found to be the same indicating similar mechanism for both the processes. Based on the numerical value of activation energy, the conduction and relaxation processes are attributed to transfer of electron from Sn2+ to Sn4+ through the thermally assisted quantum mechanical tunneling process.</abstract><cop>Amsterdam</cop><pub>Elsevier BV</pub></addata></record> |
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| source | Elsevier ScienceDirect Journals |
| subjects | Activation energy Chemical synthesis Dielectric properties Dielectric relaxation Diffraction patterns Dissipation factor Electric properties Electrical properties Electrical resistivity Heat conductivity Materials science Quantum mechanics Unit cell X-ray diffraction |
| title | Studies on dielectric and electrical properties of Ruddlesden-Popper oxide Sr^sub 2^SnO^sub 4 |
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