| Autor: |
Johannes Boy, Rüdiger Mitdank, Zbigniew Galazka, Saskia F Fischer |
| Jazyk: |
angličtina |
| Rok vydání: |
2022 |
| Předmět: |
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| Zdroj: |
Materials Research Express, Vol 9, Iss 6, p 065902 (2022) |
| Druh dokumentu: |
article |
| ISSN: |
2053-1591 |
| DOI: |
10.1088/2053-1591/ac5f8a |
| Popis: |
This work provides the first experimental determination of the low-temperature thermal properties for novel highly pure single-crystalline ZnGa _2 O _4 . The temperature dependence of the thermal conductivity, diffusivity and specific heat capacity of as-grown, degenerated ZnGa _2 O _4 single crystals is measured using the 2 ω -method between T = 27 K and room temperature. At room temperature the thermal diffusivity is D ≈ 6.9 · 10 ^−6 m ^2 s, the thermal conductivity is λ ≈ 22.9 W mK ^−1 and the specific heat capacity is C _V ≈ 537 J kgK ^−1 . The thermal conductivity increases with decreasing temperatures due to reduced phonon-phonon Umklapp scattering down to T = 50 K. For lower temperatures the thermal conductivity is limited by boundary scattering. |
| Databáze: |
Directory of Open Access Journals |
| Externí odkaz: |
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