Absorption of microwaves in La1ÀxSrxMnO3 manganese powders over a wide bandwidth

Authors

G. Li
G. G. Hu
H. D. Zhou
Xiaojuan Fan, Marshall UniversityFollow
X. G. Li

Document Type

Article

Publication Date

12-1-2001

Abstract

We present the frequency dependence of microwave-absorbing properties of La_1-xSr_xMnO₃ (x=0.4, 0.5, 0.6, and 0.7) powders at room temperature. The absorbing properties change gradually with x in the frequency range of 8–12 GHz. The optimal absorption can be achieved for a x=0.4 sample and its microwave loss peak value is about 25 dB. Further experimental results show that the absorption can be attributed to magnetic and dielectric losses and the microwave loss peak corresponds to the maximum dielectric loss tangent tan δ_e near 10.5 GHz. Furthermore, the absorbing properties of the oxides mixed with carbonic fiber and Y-type planar hexagonal ferrite have been rudimentarily studied. Results show that these additives greatly enhance the microwave-absorbing properties of the oxides.

Comments

Copyright (2001) AIP Publishing LLC. This article may be downloaded for personal use only. Any other use requires prior permission of the author and AIP Publishing. The following article appeared in Li, G., Hu, G. G., Zhou, H. D., Fan, X. J., & Li, X. G. (2001). Absorption of microwaves in La_1−xSr_xMnO₃ manganese powders over a wide bandwidth. Journal of Applied Physics, 90(11):5512-5514, and may be found at http://dx.doi.org/10.1063/1.1415053. Printed with permission. All rights reserved.

Recommended Citation

Li, G., Hu, G. G., Zhou, H. D., Fan, X. J., & Li, X. G. (2001). Absorption of microwaves in La1−xSrxMnO3 manganese powders over a wide bandwidth. Journal of Applied Physics, 90(11):5512-5514.