Attractive microwave-absorbing properties of La1-xSrxMnO3 manganite powders
Attractive microwave-absorbing properties of La1-xSrxMnO3 manganite powders
复制标题
DOI：
10.1016/s0254-0584(02)00039-1
复制
发表时间：
2002-04-28
影响因子：
4.6
通讯作者：
Li, XG
中科院分区：
文献类型：
--
作者：
Li, G;Hu, GG;Li, XG
研究了La_（1-x）Sr_xMnO_3（x = 0.4，0.5，0.6和0.7）粉末在室温下8-12 GHz频率范围内的微波吸收性能。当x = 0.4时，样品的微波损耗峰值在25 dB处。tan 6和tan 5的测量结果表明，吸收可以归因于磁和介电损耗。微波损耗峰值对应于10.5GHz附近的最大介电损耗角正切tan δ（e）。具有较低电阻率的样品表现出较大的微波吸收能力，这可以被认为是微波吸收的另一个来源。(C)2002 Elsevier Science B. V.保留所有权利。
The microwave-absorbing properties of La1-xSrxMnO3 (x = 0.4, 0.5, 0.6 and 0.7) powders have been studied in the frequency range of 8-12 GHz at room temperature. The optimal absorption can be achieved and microwave loss peak is at 25 dB for x = 0.4 sample. Both tan 6, and tan 5 measurements show that the absorption can be attributed to magnetic and dielectric losses. The microwave loss peak corresponds to the maximum dielectric loss tangent tan delta(e) near 10.5 GHz. The sample having lower resistivity exhibits a larger microwave-absorbing ability, which can be considered as another origin for the microwave absorption. (C) 2002 Elsevier Science B.V. All rights reserved.