TY - JOUR
T1 - Potential of sub-micron-sized Fe-Co particles for antenna applications
AU - Kodama, Daisuke
AU - Shinoda, Kozo
AU - Kasuya, Ryo
AU - Doi, Masaaki
AU - Tohji, Kazuyuki
AU - Jeyadevan, Balachandran
N1 - Funding Information:
This work was supported in part by the Ministry of Education, Science, Culture and Sport of Japan under the Grant-in-Aid for Basic Research (B) 22310064.
PY - 2012/4/1
Y1 - 2012/4/1
N2 - High frequency properties of (a) as-synthesized and (b) flattened by ball milling Fe-based alloys particles and their potential as antenna materials is reported. The high frequency properties of Fe-Co nanoparticles exhibited a resonance peak in the range of a few gigahertz (GHz), and the resonance peak shifted to a higher region for decreasing particle size. However, magnetic permeability was not high enough to be used as high performing electromagnetic wave absorbers. On the other hand, the permeability of Fe-Ni particles at 1 GHz was 2.5 and the magnetic loss was 0.36. However, permeability was enhanced to a value of more than 3 and the magnetic loss decreased by more than half, when the dispersibility and planular aggregates were realized through ball milling. Additional experiments suggested that the particle aggregation had greater influence in the high frequency properties than the composition and magnetic properties. Similarly, when Fe 50Co 50 particles were also subjected to ball milling, their magnetic loss decreased below the values achieved by Fe-Ni and suggested the possibility of becoming a potential candidate for antenna applications.
AB - High frequency properties of (a) as-synthesized and (b) flattened by ball milling Fe-based alloys particles and their potential as antenna materials is reported. The high frequency properties of Fe-Co nanoparticles exhibited a resonance peak in the range of a few gigahertz (GHz), and the resonance peak shifted to a higher region for decreasing particle size. However, magnetic permeability was not high enough to be used as high performing electromagnetic wave absorbers. On the other hand, the permeability of Fe-Ni particles at 1 GHz was 2.5 and the magnetic loss was 0.36. However, permeability was enhanced to a value of more than 3 and the magnetic loss decreased by more than half, when the dispersibility and planular aggregates were realized through ball milling. Additional experiments suggested that the particle aggregation had greater influence in the high frequency properties than the composition and magnetic properties. Similarly, when Fe 50Co 50 particles were also subjected to ball milling, their magnetic loss decreased below the values achieved by Fe-Ni and suggested the possibility of becoming a potential candidate for antenna applications.
UR - http://www.scopus.com/inward/record.url?scp=84861735421&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=84861735421&partnerID=8YFLogxK
U2 - 10.1063/1.3678296
DO - 10.1063/1.3678296
M3 - Article
AN - SCOPUS:84861735421
VL - 111
JO - Journal of Applied Physics
JF - Journal of Applied Physics
SN - 0021-8979
IS - 7
M1 - 07A331
ER -