| Title |
Magnetic Properties of ultrathin FeAlNbBCu Nanocrystalline Alloys Subjected to Magnetic Field Annealing |
| Authors |
박진영(Jin Young Park) ; 서수정(Su Jung Suh) ; 김광윤(Kwang Youn Kim) ; 노태환(Tae Hwan Noh) |
| Abstract |
Ultrathin Fe_(78)Al₄B_(12)Nb_5Cu_t nanocrystalline ribbon alloys with 8㎛ in thickness were annealed in longitudinal or transverse magnetic field, and then the high-frequency soft magnetic properties were investigated. High remanence ratio(B₁/B_10) of 0.83 was obtained when annealed in longitudinal magnetic field at 450℃. In case of transverse magnetic field annealing, very high effective permeability and excellent magnetic core loss characteristics in ㎒ range were obtained by transeverse magnetic field annealing. Moreover, for the ultrathin ribbon alloy with 5㎛ in thickness annealed in transverse field, much improved soft magnetic properties in the high frequency range were revealed. The effective permeability at 1㎒ and core loss at 1kG and 1㎒ were 9,000, 1.3W/cc, respectively. Thus, the reduction in ribbon thickness was very effective in improving the high-frequency magnetic properties upon transverse magnetic field annealing |