Thermally Excited Spin Waves of NiFe Nano-ring Arrays on Anodic Aluminum Oxide Templates

Seungha Yoon; Deayun Lim; Taewon Ha

doi:10.4283/JMAG.2021.26.3.239

주제분류

...

저널정보

한국자기학회
Journal of Magnetics 학술저널
Journal of Magnetics Vol.26 No.3
2021.9 239 - 242 (4page)
DOI : 10.4283/JMAG.2021.26.3.239

저자정보

Seungha Yoon (Korea Institute of Industrial Technology)
Deayun Lim (Korea Institute of Industrial Technology)
Taewon Ha (Korea Institute of Industrial Technology)

이용수
내서재: 0

내서재에 추가
되었습니다. 내서재에서
삭제되었습니다.

초록·키워드

오류제보하기

The patterned substrates have been widely developed for various applications in the nanotechnology. In particular, the magnetic ring arrays could be utilized to not only the magnetic devices, such as memories and logics, but also magnetic stealth films using spin wave excitations. In this works, the magnetic switching behaviors and the thermally excited spin wave properties of the NiFe (permalloy) ring arrays on the anodic aluminum oxide template with carbon nanotubes were investigated. With increasing the diameter of the rings, the larger dipole interactions induced the larger coercive field of the array films in the plane directions. At the magnetically saturation conditions, the smaller diameter of the rings produced the single and broad spin wave absorptions due to the isotropic magnetic domains in both the horizontal and the vertical directions. When the size of the ring increased, each component felt different magnetic anisotropy field so that the two spin wave excitation peaks revealed. In terms of the mass production of the magnetic nano-ring arrays on the anodic aluminum oxide template, the various size and the shapes of the magnetic ring patterns could be good candidates for the rf stealth films of the defense industries.

#magnetic ring #array #AAO