Negative thermal expansion induced by intermetallic charge transfer.
Negative thermal expansion induced by intermetallic charge transfer.
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DOI:
10.1088/1468-6996/16/3/034904
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发表时间:
2015-06
影响因子:
5.5
通讯作者:
Nabetani K
中科院分区:
文献类型:
--
作者:
Azuma M;Oka K;Nabetani K
Suppression of thermal expansion is of great importance for industry. Negative thermal expansion (NTE) materials which shrink on heating and expand on cooling are therefore attracting keen attention. Here we provide a brief overview of NTE induced by intermetallic charge transfer in A-site ordered double perovskites SaCu3Fe4O12 and LaCu3Fe4−xMnxO12, as well as in Bi or Ni substituted BiNiO3. The last compound shows a colossal dilatometric linear thermal expansion coefficient exceeding −70 × 10−6 K−1 near room temperature, in the temperature range which can be controlled by substitution.
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