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Nature of the cubic to rhombohedral structural transformation in ( Ag Sb Te 2 ) 15 ( Ge Te ) 85 thermoelectric material
The existence of a large thermoelectric figure of merit in ( Ag Sb Te 2 ) 15 ( Ge Te ) 85 has been known for many years. However, the nature of the crystallographic transformation in these materials from a high-temperature cubic to a low-temperature rhombohedral polymorph and its effect on electrica...
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| Published in: | Journal of applied physics 2007-03, Vol.101 (5), p.053715-053715-6 |
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| Main Authors: | , , , , |
| Format: | Article |
| Language: | English |
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| cited_by | cdi_FETCH-LOGICAL-c290t-bbac4d16058954e77590580905df43bbf0bdf97fbc08bc6980caca4728c21dea3 |
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| cites | cdi_FETCH-LOGICAL-c290t-bbac4d16058954e77590580905df43bbf0bdf97fbc08bc6980caca4728c21dea3 |
| container_end_page | 053715-6 |
| container_issue | 5 |
| container_start_page | 053715 |
| container_title | Journal of applied physics |
| container_volume | 101 |
| creator | Cook, B. A. Kramer, M. J. Wei, X. Harringa, J. L. Levin, E. M. |
| description | The existence of a large thermoelectric figure of merit in
(
Ag
Sb
Te
2
)
15
(
Ge
Te
)
85
has been known for many years. However, the nature of the crystallographic transformation in these materials from a high-temperature cubic to a low-temperature rhombohedral polymorph and its effect on electrical transport has not been clearly established. Transmission electron microscopy studies were performed that show extensive twinning in the low-temperature structure, resulting from lattice strain during the dilation along the (111) crystallographic direction. Analysis of differential scanning calorimetric studies indicates that the transformation is of second order, so that the high-temperature cubic phase is nonquenchable. High-temperature x-ray diffraction was performed to establish the transformation temperature, which was found to be complete upon heating at a temperature of
510
K
. Results of electrical conductivity measurements as a function of temperature on as-cast samples are discussed in terms of the observed twinning. |
| doi_str_mv | 10.1063/1.2645675 |
| format | article |
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(
Ag
Sb
Te
2
)
15
(
Ge
Te
)
85
has been known for many years. However, the nature of the crystallographic transformation in these materials from a high-temperature cubic to a low-temperature rhombohedral polymorph and its effect on electrical transport has not been clearly established. Transmission electron microscopy studies were performed that show extensive twinning in the low-temperature structure, resulting from lattice strain during the dilation along the (111) crystallographic direction. Analysis of differential scanning calorimetric studies indicates that the transformation is of second order, so that the high-temperature cubic phase is nonquenchable. High-temperature x-ray diffraction was performed to establish the transformation temperature, which was found to be complete upon heating at a temperature of
510
K
. Results of electrical conductivity measurements as a function of temperature on as-cast samples are discussed in terms of the observed twinning.</description><identifier>ISSN: 0021-8979</identifier><identifier>EISSN: 1089-7550</identifier><identifier>DOI: 10.1063/1.2645675</identifier><identifier>CODEN: JAPIAU</identifier><language>eng</language><publisher>United States: American Institute of Physics</publisher><subject>AMES LABORATORY ; INORGANIC, ORGANIC, PHYSICAL AND ANALYTICAL CHEMISTRY ; THERMOELECTRIC MATERIALS ; TRANSFORMATIONS</subject><ispartof>Journal of applied physics, 2007-03, Vol.101 (5), p.053715-053715-6</ispartof><rights>2007 American Institute of Physics</rights><lds50>peer_reviewed</lds50><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c290t-bbac4d16058954e77590580905df43bbf0bdf97fbc08bc6980caca4728c21dea3</citedby><cites>FETCH-LOGICAL-c290t-bbac4d16058954e77590580905df43bbf0bdf97fbc08bc6980caca4728c21dea3</cites></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><link.rule.ids>230,314,776,780,881,27901,27902</link.rule.ids><backlink>$$Uhttps://www.osti.gov/biblio/907729$$D View this record in Osti.gov$$Hfree_for_read</backlink></links><search><creatorcontrib>Cook, B. A.</creatorcontrib><creatorcontrib>Kramer, M. J.</creatorcontrib><creatorcontrib>Wei, X.</creatorcontrib><creatorcontrib>Harringa, J. L.</creatorcontrib><creatorcontrib>Levin, E. M.</creatorcontrib><creatorcontrib>Ames Laboratory (AMES), Ames, IA</creatorcontrib><title>Nature of the cubic to rhombohedral structural transformation in ( Ag Sb Te 2 ) 15 ( Ge Te ) 85 thermoelectric material</title><title>Journal of applied physics</title><description>The existence of a large thermoelectric figure of merit in
(
Ag
Sb
Te
2
)
15
(
Ge
Te
)
85
has been known for many years. However, the nature of the crystallographic transformation in these materials from a high-temperature cubic to a low-temperature rhombohedral polymorph and its effect on electrical transport has not been clearly established. Transmission electron microscopy studies were performed that show extensive twinning in the low-temperature structure, resulting from lattice strain during the dilation along the (111) crystallographic direction. Analysis of differential scanning calorimetric studies indicates that the transformation is of second order, so that the high-temperature cubic phase is nonquenchable. High-temperature x-ray diffraction was performed to establish the transformation temperature, which was found to be complete upon heating at a temperature of
510
K
. Results of electrical conductivity measurements as a function of temperature on as-cast samples are discussed in terms of the observed twinning.</description><subject>AMES LABORATORY</subject><subject>INORGANIC, ORGANIC, PHYSICAL AND ANALYTICAL CHEMISTRY</subject><subject>THERMOELECTRIC MATERIALS</subject><subject>TRANSFORMATIONS</subject><issn>0021-8979</issn><issn>1089-7550</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2007</creationdate><recordtype>article</recordtype><recordid>eNp1kEFPwyAYhonRxDk9-A_w5g6dH20p5eBhMTpNFj04zwQo2JquGGAx_nvpuqsXeL8vD2_Ig9A1gSWBqrgjy7wqacXoCZoRqHnGKIVTNAPISVZzxs_RRQhfAITUBZ-hn1cZ995gZ3FsDdZ71WkcHfat2ynXmsbLHofo9zphKUYvh2Cd38nYuQF3A77Fq0_8rvDW4BwvMKFpszbjuMA1HVv9zpne6OhTdXpnfCf7S3RmZR_M1fGeo4-nx-3Dc7Z5W788rDaZzjnETCmpy4ZUQGtOS8MY5SlCOhpbFkpZUI3lzCoNtdIVr0FLLUuW1zonjZHFHN1MvS7ETgTdRaNb7YYh_UdwYCzniVlMjPYuBG-s-PbdTvpfQUCMVgURR6uJvZ_Yserg4H94UiucFUmCOKgt_gBuWn0O</recordid><startdate>20070314</startdate><enddate>20070314</enddate><creator>Cook, B. A.</creator><creator>Kramer, M. J.</creator><creator>Wei, X.</creator><creator>Harringa, J. L.</creator><creator>Levin, E. M.</creator><general>American Institute of Physics</general><scope>AAYXX</scope><scope>CITATION</scope><scope>OTOTI</scope></search><sort><creationdate>20070314</creationdate><title>Nature of the cubic to rhombohedral structural transformation in ( Ag Sb Te 2 ) 15 ( Ge Te ) 85 thermoelectric material</title><author>Cook, B. A. ; Kramer, M. J. ; Wei, X. ; Harringa, J. L. ; Levin, E. M.</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c290t-bbac4d16058954e77590580905df43bbf0bdf97fbc08bc6980caca4728c21dea3</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2007</creationdate><topic>AMES LABORATORY</topic><topic>INORGANIC, ORGANIC, PHYSICAL AND ANALYTICAL CHEMISTRY</topic><topic>THERMOELECTRIC MATERIALS</topic><topic>TRANSFORMATIONS</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Cook, B. A.</creatorcontrib><creatorcontrib>Kramer, M. J.</creatorcontrib><creatorcontrib>Wei, X.</creatorcontrib><creatorcontrib>Harringa, J. L.</creatorcontrib><creatorcontrib>Levin, E. M.</creatorcontrib><creatorcontrib>Ames Laboratory (AMES), Ames, IA</creatorcontrib><collection>CrossRef</collection><collection>OSTI.GOV</collection><jtitle>Journal of applied physics</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Cook, B. A.</au><au>Kramer, M. J.</au><au>Wei, X.</au><au>Harringa, J. L.</au><au>Levin, E. M.</au><aucorp>Ames Laboratory (AMES), Ames, IA</aucorp><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Nature of the cubic to rhombohedral structural transformation in ( Ag Sb Te 2 ) 15 ( Ge Te ) 85 thermoelectric material</atitle><jtitle>Journal of applied physics</jtitle><date>2007-03-14</date><risdate>2007</risdate><volume>101</volume><issue>5</issue><spage>053715</spage><epage>053715-6</epage><pages>053715-053715-6</pages><issn>0021-8979</issn><eissn>1089-7550</eissn><coden>JAPIAU</coden><abstract>The existence of a large thermoelectric figure of merit in
(
Ag
Sb
Te
2
)
15
(
Ge
Te
)
85
has been known for many years. However, the nature of the crystallographic transformation in these materials from a high-temperature cubic to a low-temperature rhombohedral polymorph and its effect on electrical transport has not been clearly established. Transmission electron microscopy studies were performed that show extensive twinning in the low-temperature structure, resulting from lattice strain during the dilation along the (111) crystallographic direction. Analysis of differential scanning calorimetric studies indicates that the transformation is of second order, so that the high-temperature cubic phase is nonquenchable. High-temperature x-ray diffraction was performed to establish the transformation temperature, which was found to be complete upon heating at a temperature of
510
K
. Results of electrical conductivity measurements as a function of temperature on as-cast samples are discussed in terms of the observed twinning.</abstract><cop>United States</cop><pub>American Institute of Physics</pub><doi>10.1063/1.2645675</doi></addata></record> |
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| identifier | ISSN: 0021-8979 |
| ispartof | Journal of applied physics, 2007-03, Vol.101 (5), p.053715-053715-6 |
| issn | 0021-8979 1089-7550 |
| language | eng |
| recordid | cdi_osti_scitechconnect_907729 |
| source | American Institute of Physics:Jisc Collections:Transitional Journals Agreement 2021-23 (Reading list) |
| subjects | AMES LABORATORY INORGANIC, ORGANIC, PHYSICAL AND ANALYTICAL CHEMISTRY THERMOELECTRIC MATERIALS TRANSFORMATIONS |
| title | Nature of the cubic to rhombohedral structural transformation in ( Ag Sb Te 2 ) 15 ( Ge Te ) 85 thermoelectric material |
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