坡莫合金纳米粉的恒导磁性及其磁导率的压力、频率特性

苏昉; 谢斌; 陈允鸿

doi:10.11858/gywlxb.1995.04.002

坡莫合金纳米粉的恒导磁性及其磁导率的压力、频率特性

doi: 10.11858/gywlxb.1995.04.002

苏昉^1,2,,
谢斌¹,
陈允鸿³

1.
中国科学院结构分析开放实验室，安徽合肥 230026；
2.
中国科学技术大学基础物理中心，安徽合肥 230026；
3.
扬州大学师范学院物理系，江苏扬州 225002

详细信息

通讯作者:
苏昉

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出版历程
- 收稿日期: 1995-02-22
- 修回日期: 1995-04-20
- 刊出日期: 1995-12-05

Constant Magnetic Permeability and Its Both Pressure and Frequency Characteristic in Nanometer－Scale Ultramicron of Pormalloy

SU Fang^{1,2
,},
XIE Bin¹,
CHEN Yun-Hong³

1.
Structure Research Laboratory, USTC, Academia Sinica, Hefei 230026, China;
2.
Center of Fundamental Physics, University of Science and Technology of China, Hefei 230026, China;
3.
Department of Physics, Normal College, University of Yangzhou, Yangzhou 225002, China

More Information

Corresponding author: SU Fang

摘要

摘要: 用蒸发冷凝法制备了Fe-50wt%Ni和Fe-84wt%Ni坡莫合金的纳米微粉。经透射电镜X光能谱微区成分分析证实：微粉的成分与原材料的一致；微粉的平均粒径分别为16 nm（Fe-50Ni）和19 nm（Fe-84Ni）。在室温和36个不同的流体静压力（0.000 1~2.205 GPa）下原位测量了它们的磁化和起始磁化曲线。结果表明：（1）Fe-50wt%Ni和Fe-84wt%Ni合金纳米微粉均具有恒导滋特性；（2）这两种纳米粉的起始磁导率随静水压的变化分别为i=8.16+18.2p-24.7p2+18.1p3-6.55p4+0.908p5（Fe-50Ni合金）和i=5.38-0.169p+0.232p2-0.0786p3（Fe-84Ni合金）；（3）纳米粉的起始磁导率i在频率高于10 MHz才降低，而Fe-50Ni合金片的i在频率高于1 MHz，Fe-84Ni高于100 kHz时就开始下降，故纳米压粉磁芯可应用的频率范围可以比相应组分合金片的大1~2个数量级。
- 镍铁合金 /
- 超微粉 /
- 磁导率 /
- 流体静压力 /
- 频率特性
Abstract: By means of vacuum evaporation and condensation technique, nanometer-scale ultramicrons of Pormalloy (Fe-50wt%Ni, Fe-84wt%Ni) were prepared. It is found out with the method of TEM and X-ray diffraction that the composition of the ultramicron coincides with that of its mother alloy, and the average grain size is 16 nm (Fe-50Ni) and 19 nm (Fe-84Ni). Under room temperature and hydrostatic pressure of 36 various magnitudes ranging from 0.000 1 to 2.205 GPa the magnetization curve and initial magnetization curve were measured to reveal their relation with pressure. It is concluded: (1) The nanometer-scale ultramicron of both Pormalloy Fe-50wt%Ni and Fe-84wt%Ni possesses constant magnetic permeability; (2) Initial differential magnetic permeability, i varies with the pressure as follows: i=8.16+18.2p-24.7p2+18.1p3-6.55p4+0.908p5 (for Fe-50wt%Ni), i=5.38-0.169p+0.232p2-0.0786p3 (for Fe-84wt%Ni); (3) i of these ultramicrons decreases when f10 MHz, but i of alloy Fe-50Ni goes down when f1 MHz, i of alloy Fe-84Ni drops when f100 kHz, so applied frequency range of magnetic ultramicron core is one-two order of magnitude more than that of Pormalloy with the same composition.
- nickel-ferro alloys /
- super-fine grain /
- magnetic permeability /
- hydrostatic pressure /
- frequency characteristic