| Title |
The Magnetic Properties of Ultrathin Fe-based Nanocrystalline Alloy Subjected to Flash Annealing |
| Authors |
박진영(Jin Young Park) ; 서수정(Su Jung Suh) ; 김광윤(Kwang Youn Kim) ; 노태환(Tae Hwan Non) |
| Abstract |
In an effort to obtain soft magnetic materials with excellent high-frequency characteristics, effects of flash annealing on magnetic properties and microstructure in melt-spun Fe-B-Nb-Cu and Fe-Al-Nb-B-Cu alloy with ultrathin ribbon shape less than 10㎛ thickness were investigated. The Fe-B-Nb-Cu alloy subjected to optimum flash annealing treatment showed higher effective permeability and smaller magnetic core loss at 1 MHz than conventionally annealed alloy. The enhanced magnetic properties of the flash-annealed alloy were attributed to the reduced a-Fe phase grain size to 6㎚ and the lower remanence ratio of about 0.3 comparing to the conventionally annealed alloy with the values of 9㎚ and 0.7, respectively. These showed that the flash annealing technique was effective in improving the high-frequency soft magnetic properties of Fe-B-Nb-Cu nanocrystalline alloy. However, in flash-annealed Fe-Al-Nb-B-Cu alloy, improvement of the magnetic properties was not observec. |