Abstract
The RE2Fe17 (RE = Ce, Pr, Nd, Sm) and LaxPr2−xFe17 (x = 0.0, 0.1, 0.2, 0.3, 0.4) alloys were synthesized by arc smelting and high-energy ball milling methods. The phase structure, morphology, magnetic properties and electromagnetic parameters of the powders were characterized by x-ray diffraction, scanning electron microscopy, vibrating sample magnetometer and vector network analyzer, respectively. The results reveal that the lattice parameters a and c and unit-cell volume V of the LaxPr2−xFe17 alloys increase linearly upon the La content. The minimum absorption peak frequency shifts towards a lower-frequency region upon the La content. And the minimum reflection loss and saturation magnetization of the LaxPr2−xFe17 alloys decrease upon the La content, while the minimum reflection loss of Pr2Fe17 and La0.4Pr1.6Fe17 alloy of the 2.0 mm coating thickness reaches about −13.65 dB and −7.15 dB at 5.92 GHz and 3.6 GHz, respectively.
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