Reduced dimensionality effects on phonon transport
Electron paramagnetic resonance (EPR) spectroscopy has been used to study energy transport properties of both bulk and nanophosphor (nominally 30 nm) oxyorthosilicate samples, and we were able to separate the effects of crystal disorder and relaxation lifetime broadening on the EPR linewidths. The l...
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| Veröffentlicht in: | Journal of applied physics 2010-11, Vol.108 (10), p.104311-104311-7 |
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| container_end_page | 104311-7 |
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| container_issue | 10 |
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| container_title | Journal of applied physics |
| container_volume | 108 |
| creator | Blair, Michael W. Bennett, Bryan L. Tornga, Stephanie C. Smith, Nickolaus A. Muenchausen, Ross E. |
| description | Electron paramagnetic resonance (EPR) spectroscopy has been used to study energy transport properties of both bulk and nanophosphor (nominally 30 nm) oxyorthosilicate samples, and we were able to separate the effects of crystal disorder and relaxation lifetime broadening on the EPR linewidths. The low temperature linewidths
(
T
<
10
K
)
were inhomogeneously broadened and dominated by crystal disorder effects and the nanophosphors showed an order of magnitude increase in crystal disorder. Both bulk and nanophosphor samples showed significant lifetime broadening involving direct relaxation via phonons and the Orbach relaxation process. At low temperatures, the lifetimes of the bulk samples displayed the influence of the lattice-bath relaxation time as well as the spin-lattice relaxation time while the lifetimes of the nanophosphor samples were not influenced by the lattice-bath relaxation time. The results imply that reduced dimensionality in insulators does reduce the lattice-bath relaxation time, although the exact relationship cannot be confirmed by this study largely due to the nonideal nature of the materials studied. |
| doi_str_mv | 10.1063/1.3510533 |
| format | Article |
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(
T
<
10
K
)
were inhomogeneously broadened and dominated by crystal disorder effects and the nanophosphors showed an order of magnitude increase in crystal disorder. Both bulk and nanophosphor samples showed significant lifetime broadening involving direct relaxation via phonons and the Orbach relaxation process. At low temperatures, the lifetimes of the bulk samples displayed the influence of the lattice-bath relaxation time as well as the spin-lattice relaxation time while the lifetimes of the nanophosphor samples were not influenced by the lattice-bath relaxation time. The results imply that reduced dimensionality in insulators does reduce the lattice-bath relaxation time, although the exact relationship cannot be confirmed by this study largely due to the nonideal nature of the materials studied.</description><identifier>ISSN: 0021-8979</identifier><identifier>EISSN: 1089-7550</identifier><identifier>DOI: 10.1063/1.3510533</identifier><identifier>CODEN: JAPIAU</identifier><language>eng</language><publisher>American Institute of Physics</publisher><ispartof>Journal of applied physics, 2010-11, Vol.108 (10), p.104311-104311-7</ispartof><rights>2010 American Institute of Physics</rights><lds50>peer_reviewed</lds50><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c284t-1a5441240d6abd4875bae22dda60274571169a2af78f4a7c11ef987be6772fd3</citedby><cites>FETCH-LOGICAL-c284t-1a5441240d6abd4875bae22dda60274571169a2af78f4a7c11ef987be6772fd3</cites></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktohtml>$$Uhttps://pubs.aip.org/jap/article-lookup/doi/10.1063/1.3510533$$EHTML$$P50$$Gscitation$$H</linktohtml><link.rule.ids>314,780,784,794,1559,4512,27924,27925,76384,76390</link.rule.ids></links><search><creatorcontrib>Blair, Michael W.</creatorcontrib><creatorcontrib>Bennett, Bryan L.</creatorcontrib><creatorcontrib>Tornga, Stephanie C.</creatorcontrib><creatorcontrib>Smith, Nickolaus A.</creatorcontrib><creatorcontrib>Muenchausen, Ross E.</creatorcontrib><title>Reduced dimensionality effects on phonon transport</title><title>Journal of applied physics</title><description>Electron paramagnetic resonance (EPR) spectroscopy has been used to study energy transport properties of both bulk and nanophosphor (nominally 30 nm) oxyorthosilicate samples, and we were able to separate the effects of crystal disorder and relaxation lifetime broadening on the EPR linewidths. The low temperature linewidths
(
T
<
10
K
)
were inhomogeneously broadened and dominated by crystal disorder effects and the nanophosphors showed an order of magnitude increase in crystal disorder. Both bulk and nanophosphor samples showed significant lifetime broadening involving direct relaxation via phonons and the Orbach relaxation process. At low temperatures, the lifetimes of the bulk samples displayed the influence of the lattice-bath relaxation time as well as the spin-lattice relaxation time while the lifetimes of the nanophosphor samples were not influenced by the lattice-bath relaxation time. The results imply that reduced dimensionality in insulators does reduce the lattice-bath relaxation time, although the exact relationship cannot be confirmed by this study largely due to the nonideal nature of the materials studied.</description><issn>0021-8979</issn><issn>1089-7550</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2010</creationdate><recordtype>article</recordtype><recordid>eNp1z0tLxDAYheEgCtbRhf-gWxcdvy-XJtkIMniDAUFmH9JcsDLTliQu5t9bmS7cuDqblwMPIbcIa4SW3eOaCQTB2BmpEJRupBBwTioAio3SUl-Sq5y_ABAV0xWhH8F_u-Br3x_CkPtxsPu-HOsQY3Al1-NQT5_jME9JdsjTmMo1uYh2n8PNsiuye37abV6b7fvL2-Zx2ziqeGnQCs6RcvCt7TxXUnQ2UOq9bYFKLiRiqy21UarIrXSIIWolu9BKSaNnK3J3unVpzDmFaKbUH2w6GgTzazVoFuvcPpza7Ppiy6z4P17A5i-Y_QC6rVt_</recordid><startdate>20101115</startdate><enddate>20101115</enddate><creator>Blair, Michael W.</creator><creator>Bennett, Bryan L.</creator><creator>Tornga, Stephanie C.</creator><creator>Smith, Nickolaus A.</creator><creator>Muenchausen, Ross E.</creator><general>American Institute of Physics</general><scope>AAYXX</scope><scope>CITATION</scope></search><sort><creationdate>20101115</creationdate><title>Reduced dimensionality effects on phonon transport</title><author>Blair, Michael W. ; Bennett, Bryan L. ; Tornga, Stephanie C. ; Smith, Nickolaus A. ; Muenchausen, Ross E.</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c284t-1a5441240d6abd4875bae22dda60274571169a2af78f4a7c11ef987be6772fd3</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2010</creationdate><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Blair, Michael W.</creatorcontrib><creatorcontrib>Bennett, Bryan L.</creatorcontrib><creatorcontrib>Tornga, Stephanie C.</creatorcontrib><creatorcontrib>Smith, Nickolaus A.</creatorcontrib><creatorcontrib>Muenchausen, Ross E.</creatorcontrib><collection>CrossRef</collection><jtitle>Journal of applied physics</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Blair, Michael W.</au><au>Bennett, Bryan L.</au><au>Tornga, Stephanie C.</au><au>Smith, Nickolaus A.</au><au>Muenchausen, Ross E.</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Reduced dimensionality effects on phonon transport</atitle><jtitle>Journal of applied physics</jtitle><date>2010-11-15</date><risdate>2010</risdate><volume>108</volume><issue>10</issue><spage>104311</spage><epage>104311-7</epage><pages>104311-104311-7</pages><issn>0021-8979</issn><eissn>1089-7550</eissn><coden>JAPIAU</coden><abstract>Electron paramagnetic resonance (EPR) spectroscopy has been used to study energy transport properties of both bulk and nanophosphor (nominally 30 nm) oxyorthosilicate samples, and we were able to separate the effects of crystal disorder and relaxation lifetime broadening on the EPR linewidths. The low temperature linewidths
(
T
<
10
K
)
were inhomogeneously broadened and dominated by crystal disorder effects and the nanophosphors showed an order of magnitude increase in crystal disorder. Both bulk and nanophosphor samples showed significant lifetime broadening involving direct relaxation via phonons and the Orbach relaxation process. At low temperatures, the lifetimes of the bulk samples displayed the influence of the lattice-bath relaxation time as well as the spin-lattice relaxation time while the lifetimes of the nanophosphor samples were not influenced by the lattice-bath relaxation time. The results imply that reduced dimensionality in insulators does reduce the lattice-bath relaxation time, although the exact relationship cannot be confirmed by this study largely due to the nonideal nature of the materials studied.</abstract><pub>American Institute of Physics</pub><doi>10.1063/1.3510533</doi></addata></record> |
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| source | AIP Journals Complete; AIP Digital Archive; Alma/SFX Local Collection |
| title | Reduced dimensionality effects on phonon transport |
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