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| Giant magnetoimpedance effect in Fe-Zr-Nb-Cu-B nanocrystalline ribbons | |
| 作者姓名： | ANKang HUJifan QINHongwei HANTao WANGYizhong YUXiaojun LIBo |
| 作者单位： | [1]SchoolofPhysicsandMicroelectronics,StateKeyLaboratoryforCrystalMaterials,ShandongUniversity,Jinan250100,China [2]InstituteofPhysics,ChineseAcademyofSciences,Beijing100080,China [3]DepartmentofFunctionalMaterials,CentralIron＆SteelResearchInstitute,Beijing100081,China |
| 基金项目： | This work was financially supported by the National Natural Science Foundation of China (No. 50271036) |
| 摘 要： | The giant magnetoimpedance effect of the nanocrystalline ribbon Fe84Zr2.08Nb1.92Cu1B11 (atom fraction in %) was investigated. There is an optimum annealing temperature (TA=998 K) for obtaining the largest GMI (giant magneto-impedance) effect in the ribbon Fe84Zr2.08Nb1.92Cu1B11. The ribbon with longer ribbon length has stronger GMI effect, which may be connected with the demagnetization effect of samples. The frequency fmax, where the maximum magnetoimpedance GMI(Z)max =(Z(H)-Z(O)/Z(O)]max occurs, is near the intersecting frequency fi of the curves of GMI(R), GMI(X), and GMI(Z) versus frequency. The magnetoreactance GMI(X) decreases monotonically with increasing frequency, which may be due to the decrease of permeability. In contrast, with the AC (alternating current) frequency increasing, the magnetore-sistance GMI(R) increases at first, undergoes a peak, and under then drops. The increase of the magnetoresistance may result from the enhancement of the skin effect with frequency. The maximum magnetoimpedance value GMI(Z)max under H=7.2 kA/m is about -56.18% at f= 0.3 MHz for the nanocrystalline ribbon Fe84Zr2.08Nb1.92Cu1B11 with the annealing temperature TA=998K and the ribbon length L=6cm. |
| 关 键 词： | 纳米晶体带状物 磁导率 退火处理 磁阻抗 铁合金 锆 钕 铜 硼 磁性材料 |
Giant magnetoimpedance effect in Fe-Zr-Nb-Cu-B nanocrystalline ribbons |
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| ANKang HUJifan QINHongwei HANTao WANGYizhong YUXiaojun LIBo.Giant magnetoimpedance effect in Fe-Zr-Nb-Cu-B nanocrystalline ribbons[J].Rare Metals,2004,23(3):235-240. | |
| Authors: | AN Kang HU Jifan Qin Hongwei HAN Tao Wang Yizhong YU Xiaojun LI Bo |
| Affiliation: | 1. School of Physics and Microelectronics, State Key Laboratory for Crystal Materials, Shandong University, Jinan 250100, China 2. Institute of Physics, Chinese Academy of Sciences, Beijing 100080, China 3. Depa1tment of Functional Materials, Central Iron & Steel Research Institute, Beijing 100081, China |
| Abstract: | The giant magnetoimpedance effect of the nanocrystalline ribbon Fe84Zr2.08Nb1.92Cu1B11 (atom fraction in %) was investigated. There is an optimum annealing temperature (TA≈ 998 K) for obtaining the largest GMI (giant magneto impedance) effect in the ribbon Fes4Zr2.08Nb1.92Cu1B 11. The ribbon with longer ribbon length has stronger GMI effect, which may be connected with the demagnetization effect of samples. The frequencyfmax, where the maximum magnetoimpedance GMI(Z)max = (Z(H) - Z(0))/Z(0)]max occurs, is near the intersecting frequency fi of the curves of GMI(R), GMI(X), and GMI(Z) versus frequency. The magnetoreactance GMI(X) decreases monotonically with increasing frequency, which may be due to the decrease of permeability. In contrast, with the AC (alternating current) frequency increasing, the magnetore sistance GMI(R) increases at first, undergoes a peak, and under then drops. The increase of the magnetoresistance may result from the enhancement of the skin effect with frequency. The maximum magnetoimpedance value GMI(Z)max under H = 7.2 kA/m is about -56.18% at f= 0.3 MHz for the nanocrystalline ribbon Fe84Zr2.08Nb1.92Cu1B11 with the annealing temperature TA= 998 K and the ribbon length L = 6 cm. |
| Keywords: | magnetic materials nanocrystalline ribbon giant magnetoimpedance effect permeability annealing |
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