Giant Magneto-impedance Effect in Nanocrystalline Fe73.5CuNb3Si13.5B9 Ribbons
CHEN Chen1,2, GUO Hui-qun1, ZHAO Tong-yun1, LI Min2, LUAN Kai-zheng2, SHEN Bao-gen1, LIU Yi-hua2, ZHAO Jian-gao1, ME1 Liang-mo2
1State Key Laboratory of Magnetism, Institute of Physics & Center of Condensed Matter Physics, Chinese Academy of Sciences, Beijing 100080
2Department of Physics, Shandong University, Ji’nan 250100
Giant Magneto-impedance Effect in Nanocrystalline Fe73.5CuNb3Si13.5B9 Ribbons
1State Key Laboratory of Magnetism, Institute of Physics & Center of Condensed Matter Physics, Chinese Academy of Sciences, Beijing 100080
2Department of Physics, Shandong University, Ji’nan 250100
Abstract： Magneto-impedance (MI) effects have been observed in amorphous and nanocrystalline Fe73.5CuNb3Si13.5B9 ribbons. Large MI values have been obtained in nanocrystalline samples (NCS), but not in as-quenched samples (AQS). The magnetic responses of impedance of nanocrystalline samples share some common features with that of Co-based amorphous wire and ribbon samples. The field dependencies of effective permeability for nanocrystalline samples have shown a sharp change at the anisotropy field. The effective permeability and the hysteresis loops for AQS and NCS have been shown to be responsible for their MI effects. The sensitivity of the magnetic responses in the nanocrystalline sample can reach 50%/Oe.
1996, Vol. 13 
