Vibrational spectroscopic studies of phase transition in ferroelectric TAAP
Tellurc acid ammonium phosphate (TAAP) is a new class m ferroelectric with a transition temperature of 45°C. Structural data and preliminary spectroscopic studies confirmed the presence of NH…O hydrogen bonds. Raman spectroscopic studies on this crystal were carried out in the temperature range 20–...
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| Veröffentlicht in: | Journal of Raman spectroscopy 1989-06, Vol.20 (6), p.351-357 |
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| container_end_page | 357 |
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| container_issue | 6 |
| container_start_page | 351 |
| container_title | Journal of Raman spectroscopy |
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| creator | Shashikala, M. N. Raghunatha Chary, B. Bhat, H. L. Narayanan, P. S. |
| description | Tellurc acid ammonium phosphate (TAAP) is a new class m ferroelectric with a transition temperature of 45°C. Structural data and preliminary spectroscopic studies confirmed the presence of NH…O hydrogen bonds. Raman spectroscopic studies on this crystal were carried out in the temperature range 20–80 °C to look for possible spectral changes as a result of phase transition. A detailed analysis of the line width and frequencies was carried out across the phase transition in order to understand the nature of the phase transition. From the spectral features of the bands in different regions it is inferred that the groups TeO6, PO4 and NH4 do not undergo changes that could trigger the phase transition. On the other hand, the broadening of the bands in the range 2600–3400 cm−1 suggests the possibility of an order–disorder type of transition phenomenon involving hydrogen bonds. This is further supported by the shift of the transition temperature from 45 to 87°C on deuteration. |
| doi_str_mv | 10.1002/jrs.1250200603 |
| format | Article |
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N. ; Raghunatha Chary, B. ; Bhat, H. L. ; Narayanan, P. S.</creator><creatorcontrib>Shashikala, M. N. ; Raghunatha Chary, B. ; Bhat, H. L. ; Narayanan, P. S.</creatorcontrib><description>Tellurc acid ammonium phosphate (TAAP) is a new class m ferroelectric with a transition temperature of 45°C. Structural data and preliminary spectroscopic studies confirmed the presence of NH…O hydrogen bonds. Raman spectroscopic studies on this crystal were carried out in the temperature range 20–80 °C to look for possible spectral changes as a result of phase transition. A detailed analysis of the line width and frequencies was carried out across the phase transition in order to understand the nature of the phase transition. From the spectral features of the bands in different regions it is inferred that the groups TeO6, PO4 and NH4 do not undergo changes that could trigger the phase transition. On the other hand, the broadening of the bands in the range 2600–3400 cm−1 suggests the possibility of an order–disorder type of transition phenomenon involving hydrogen bonds. This is further supported by the shift of the transition temperature from 45 to 87°C on deuteration.</description><identifier>ISSN: 0377-0486</identifier><identifier>EISSN: 1097-4555</identifier><identifier>DOI: 10.1002/jrs.1250200603</identifier><identifier>CODEN: JRSPAF</identifier><language>eng</language><publisher>Chichester, UK: John Wiley & Sons, Ltd</publisher><subject>Atomic and molecular physics ; Exact sciences and technology ; Molecular properties and interactions with photons ; Molecular spectra ; Physics ; Raman and rayleigh spectra (including optical scattering)</subject><ispartof>Journal of Raman spectroscopy, 1989-06, Vol.20 (6), p.351-357</ispartof><rights>Copyright © 1989 John Wiley & Sons Ltd.</rights><rights>1990 INIST-CNRS</rights><lds50>peer_reviewed</lds50><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c3873-dd7023a8b40a4f67ea550f6fa56b1fd37cb95e22e4e55782aedaf6be5d8876ab3</citedby><cites>FETCH-LOGICAL-c3873-dd7023a8b40a4f67ea550f6fa56b1fd37cb95e22e4e55782aedaf6be5d8876ab3</cites></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktopdf>$$Uhttps://onlinelibrary.wiley.com/doi/pdf/10.1002%2Fjrs.1250200603$$EPDF$$P50$$Gwiley$$H</linktopdf><linktohtml>$$Uhttps://onlinelibrary.wiley.com/doi/full/10.1002%2Fjrs.1250200603$$EHTML$$P50$$Gwiley$$H</linktohtml><link.rule.ids>314,780,784,1417,27924,27925,45574,45575</link.rule.ids><backlink>$$Uhttp://pascal-francis.inist.fr/vibad/index.php?action=getRecordDetail&idt=6583568$$DView record in Pascal Francis$$Hfree_for_read</backlink></links><search><creatorcontrib>Shashikala, M. N.</creatorcontrib><creatorcontrib>Raghunatha Chary, B.</creatorcontrib><creatorcontrib>Bhat, H. L.</creatorcontrib><creatorcontrib>Narayanan, P. S.</creatorcontrib><title>Vibrational spectroscopic studies of phase transition in ferroelectric TAAP</title><title>Journal of Raman spectroscopy</title><addtitle>J. Raman Spectrosc</addtitle><description>Tellurc acid ammonium phosphate (TAAP) is a new class m ferroelectric with a transition temperature of 45°C. Structural data and preliminary spectroscopic studies confirmed the presence of NH…O hydrogen bonds. Raman spectroscopic studies on this crystal were carried out in the temperature range 20–80 °C to look for possible spectral changes as a result of phase transition. A detailed analysis of the line width and frequencies was carried out across the phase transition in order to understand the nature of the phase transition. From the spectral features of the bands in different regions it is inferred that the groups TeO6, PO4 and NH4 do not undergo changes that could trigger the phase transition. On the other hand, the broadening of the bands in the range 2600–3400 cm−1 suggests the possibility of an order–disorder type of transition phenomenon involving hydrogen bonds. This is further supported by the shift of the transition temperature from 45 to 87°C on deuteration.</description><subject>Atomic and molecular physics</subject><subject>Exact sciences and technology</subject><subject>Molecular properties and interactions with photons</subject><subject>Molecular spectra</subject><subject>Physics</subject><subject>Raman and rayleigh spectra (including optical scattering)</subject><issn>0377-0486</issn><issn>1097-4555</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>1989</creationdate><recordtype>article</recordtype><recordid>eNqFkE1P20AQhlcVSA3QK2cfqt4cxl7vrn2MUAkfUYooX7fVeD2rLjWx2XFU8u_rKIiqJ05zeZ539L5CHGcwzQDyk6fI0yxXkANokJ_EJIPKpIVSak9MQBqTQlHqz-KA-QkAqkpnE3F1H-qIQ-hW2Cbckxtix67rg0t4WDeBOOl80v9CpmSIuOKwZZOwSjzF2FG7NUb4dja7PhL7HlumL2_3UNydfb89PU8XP-YXp7NF6mRpZNo0BnKJZV0AFl4bQqXAa49K15lvpHF1pSjPqSClTJkjNeh1TaopS6Oxlofi2y63j93Lmniwz4EdtS2uqFuzlWocoJB6BKc70I2lOJK3fQzPGDc2A7vdzI6b2X-bjcLXt2Rkh60fC7vA75ZWpVS6HLFqh_0JLW0-CLWXNz__e5Hu3MADvb67GH9bbaRR9mE5t4vH-6ulnF9aLf8CVPyNVg</recordid><startdate>198906</startdate><enddate>198906</enddate><creator>Shashikala, M. 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S.</creatorcontrib><collection>Istex</collection><collection>Pascal-Francis</collection><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 Raman spectroscopy</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Shashikala, M. N.</au><au>Raghunatha Chary, B.</au><au>Bhat, H. L.</au><au>Narayanan, P. S.</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Vibrational spectroscopic studies of phase transition in ferroelectric TAAP</atitle><jtitle>Journal of Raman spectroscopy</jtitle><addtitle>J. Raman Spectrosc</addtitle><date>1989-06</date><risdate>1989</risdate><volume>20</volume><issue>6</issue><spage>351</spage><epage>357</epage><pages>351-357</pages><issn>0377-0486</issn><eissn>1097-4555</eissn><coden>JRSPAF</coden><abstract>Tellurc acid ammonium phosphate (TAAP) is a new class m ferroelectric with a transition temperature of 45°C. Structural data and preliminary spectroscopic studies confirmed the presence of NH…O hydrogen bonds. Raman spectroscopic studies on this crystal were carried out in the temperature range 20–80 °C to look for possible spectral changes as a result of phase transition. A detailed analysis of the line width and frequencies was carried out across the phase transition in order to understand the nature of the phase transition. From the spectral features of the bands in different regions it is inferred that the groups TeO6, PO4 and NH4 do not undergo changes that could trigger the phase transition. On the other hand, the broadening of the bands in the range 2600–3400 cm−1 suggests the possibility of an order–disorder type of transition phenomenon involving hydrogen bonds. This is further supported by the shift of the transition temperature from 45 to 87°C on deuteration.</abstract><cop>Chichester, UK</cop><pub>John Wiley & Sons, Ltd</pub><doi>10.1002/jrs.1250200603</doi><tpages>7</tpages></addata></record> |
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| language | eng |
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| subjects | Atomic and molecular physics Exact sciences and technology Molecular properties and interactions with photons Molecular spectra Physics Raman and rayleigh spectra (including optical scattering) |
| title | Vibrational spectroscopic studies of phase transition in ferroelectric TAAP |
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