Journal
IEEE TRANSACTIONS ON MAGNETICS
Volume 55, Issue 2, Pages -Publisher
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/TMAG.2018.2869683
Keywords
Composite; impedance match; microwave absorption; permeability; qualified bandwidth (QB); rare-earth transition-metal intermetallic
Funding
- National Natural Science Foundation of China [51731001, 51371009, 11504348, 11675006]
- National Key Research and Development Program of China [2016YFB0700901, 2017YFA0401502, 2017YFA0206303]
- Foundation of Key Laboratory of Neutron Physics of CAEP [2014BB02]
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The magnetic and microwave absorption properties of Nd2Co16.5Si0.5 and Nd2Co16.5Si0.5-paraffin composite have been investigated. The Nd2Co16.5Si0.5 compound shows a planar anisotropy with a saturation magnetization of 114 emu/g at room temperature. The Nd2Co16.5Si0.5-paraffin composite exhibits a permeability of 2.1 at a frequency of 100 MHz, together with a microwave reflection loss (RL) up to -38 dB at a frequency of 4 GHz with a thickness of 2.8 mm and a qualified bandwidth (QB, RL <= -10 dB) of 3.2 GHz at a frequency of 14 GHz with a thickness of 1 mm. This composite exhibits both high working frequency and permeability due to its high saturation magnetization. A strong microwave absorption was achieved for the composite through a better impedance match. Hence, it is possible that this composite can be used as a high-performance thin-layer microwave absorber.
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