Electromagnetic and microwave absorption properties of Er-Ho-Fe alloys

The Er-Ho-Fe has an excellent absorbing performance. The Er0.3Ho1.7Fe17 powder could achieve the minimum RL of −24.07 dB at 6.96 GHz with a thickness of 2.0 mm and the minimum RL was less than −20 dB at the thickness range from 2.0 to 3.0 mm. The minimum RL of Er0.3Ho1.7Fe17 was −37.26 dB at 5.68 GHz and the frequency bandwidth of R < −10 dB reached about 1.2 GHz with a thickness of 2.4 mm.262