Structure, stoichiometry, and properties of the chimney-ladder phases Ru2Ge3+x (0 < x < 1)
The preparation and physical characterization of non-stoichiometric Ru2Ge3+x (0 ≤ x ≤ 1) are reported for the first time. The defect TiSi2-type chimney-ladder structure is maintained for the full stoichiometry range. The resistivity of Ru2Ge3+x increases systematically with x from 300 m Ω cm, x = 0-...
| Main Authors: | , , |
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| Format: | Journal article |
| Language: | English |
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2002
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| _version_ | 1797074253131022336 |
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| author | Hayward, M Ramirez, A Cava, R |
| author_facet | Hayward, M Ramirez, A Cava, R |
| author_sort | Hayward, M |
| collection | OXFORD |
| description | The preparation and physical characterization of non-stoichiometric Ru2Ge3+x (0 ≤ x ≤ 1) are reported for the first time. The defect TiSi2-type chimney-ladder structure is maintained for the full stoichiometry range. The resistivity of Ru2Ge3+x increases systematically with x from 300 m Ω cm, x = 0-3 Ω cm, x = 1 at 300 K. The temperature dependence is consistent with a variable range-hopping mechanism for x ≥ 0.6. The Seebeck coefficients of samples do not evolve simply with x. A low thermal conductivity (κ300 K = 0.03 W/K cm) suggests that Ru2Ge3 has some of the properties of a phonon-glass-electron-crystal. The low value of the thermoelectric figure of merit ZT = 3.2 × 10-3 (T = 300 K) calculated for Ru2Ge3 is due primarily to a low conductivity. © 2002 Elsevier Science (USA). |
| first_indexed | 2024-03-06T23:33:28Z |
| format | Journal article |
| id | oxford-uuid:6cd69449-cf9d-4fb5-87d4-c658c237d14a |
| institution | University of Oxford |
| language | English |
| last_indexed | 2024-03-06T23:33:28Z |
| publishDate | 2002 |
| record_format | dspace |
| spelling | oxford-uuid:6cd69449-cf9d-4fb5-87d4-c658c237d14a2022-03-26T19:13:49ZStructure, stoichiometry, and properties of the chimney-ladder phases Ru2Ge3+x (0 < x < 1)Journal articlehttp://purl.org/coar/resource_type/c_dcae04bcuuid:6cd69449-cf9d-4fb5-87d4-c658c237d14aEnglishSymplectic Elements at Oxford2002Hayward, MRamirez, ACava, RThe preparation and physical characterization of non-stoichiometric Ru2Ge3+x (0 ≤ x ≤ 1) are reported for the first time. The defect TiSi2-type chimney-ladder structure is maintained for the full stoichiometry range. The resistivity of Ru2Ge3+x increases systematically with x from 300 m Ω cm, x = 0-3 Ω cm, x = 1 at 300 K. The temperature dependence is consistent with a variable range-hopping mechanism for x ≥ 0.6. The Seebeck coefficients of samples do not evolve simply with x. A low thermal conductivity (κ300 K = 0.03 W/K cm) suggests that Ru2Ge3 has some of the properties of a phonon-glass-electron-crystal. The low value of the thermoelectric figure of merit ZT = 3.2 × 10-3 (T = 300 K) calculated for Ru2Ge3 is due primarily to a low conductivity. © 2002 Elsevier Science (USA). |
| spellingShingle | Hayward, M Ramirez, A Cava, R Structure, stoichiometry, and properties of the chimney-ladder phases Ru2Ge3+x (0 < x < 1) |
| title | Structure, stoichiometry, and properties of the chimney-ladder phases Ru2Ge3+x (0 < x < 1) |
| title_full | Structure, stoichiometry, and properties of the chimney-ladder phases Ru2Ge3+x (0 < x < 1) |
| title_fullStr | Structure, stoichiometry, and properties of the chimney-ladder phases Ru2Ge3+x (0 < x < 1) |
| title_full_unstemmed | Structure, stoichiometry, and properties of the chimney-ladder phases Ru2Ge3+x (0 < x < 1) |
| title_short | Structure, stoichiometry, and properties of the chimney-ladder phases Ru2Ge3+x (0 < x < 1) |
| title_sort | structure stoichiometry and properties of the chimney ladder phases ru2ge3 x 0 lt x lt 1 |
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