Correlating the microstructure of Mn-Zn ferrite with magnetic noise for magnetic shield applications

被引：16

作者：

Sun, Bowen ^{[1
,2
]}

Ma, Danyue ^{[1
,2
,3
]}

Bai, Guohua ^{[5
]}

Lu, Jixi ^{[1
,2
]}

Yang, Ke ^{[4
]}

Wang, Kai ^{[1
,2
]}

Xu, Xueping ^{[1
,2
]}

Zhai, Yueyang ^{[1
,2
]}

Quan, Wei ^{[1
,2
]}

Han, Bangcheng ^{[1
,2
]}

机构：

[1] Beihang Univ, Sch Instrumentat & Optoelect Engn, Key Lab Ultraweak Magnet Field Measurement Technol, Minist Educ, Beijing 100191, Peoples R China

[2] Beihang Univ, Hangzhou Innovat Inst, Zhejiang Prov Key Lab Ultraweak Magnet Field Space, Hangzhou 310051, Peoples R China

[3] Beihang Univ, Sch Phys, Beijing 100191, Peoples R China

[4] Xian Modern Control Technol Res Inst, Xian 710065, Peoples R China

[5] Hangzhou Dianzi Univ, Inst Adv Magnet Mat, Coll Mat & Environm Engn, Hangzhou 310012, Peoples R China

来源：

CERAMICS INTERNATIONAL | 2023年 / 49卷 / 08期

基金：

中国国家自然科学基金;

关键词：

Ferrite; Microstructure; Grain size; Magnetic properties; Magnetic noise; COMPLEX PERMEABILITY; ATOMIC MAGNETOMETER; PERMITTIVITY; TEMPERATURE; SPECTRA;

D O I：

10.1016/j.ceramint.2022.12.045

中图分类号：

TQ174 [陶瓷工业]; TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

Many sensitive atomic devices require magnetic shield to reduce external magnetic field interference. Mn-Zn ferrites are optimistic candidates for shielding because they provide a high shielding factor and a low magnetic noise. This study evaluated the magnetic noise of Mn-Zn ferrite magnetic shield based on its grain size. The morphologies of Mn-Zn ferrite samples were characterized to establish a correlation between their grain sizes and magnetic permeability, which can be used to calculate magnetic noises. The correlation was then used to evaluate the shielding performance of another Mn-Zn ferrite, where the magnetic noise of the magnetic shield made from the ferrite was calculated to be 2.53 f -1/2fT. The magnetic noise of the magnetic shield was also measured experimentally using a spin-exchange relaxation-free atomic magnetometer. The measured magnetic noise of ferrite shield was 2.61 f -1/2fT, while the white noise of the atomic magnetometer was 0.71 fT/Hz1/2 below 100 Hz. The consistency between the experimental results and predicted values suggests the viability of the proposed approach, providing a convenient, efficient, and precise method for developing ferrite ceramics materials for low-noise magnetic shields.

引用

页码：11960 / 11967

页数：8

共 42 条

[1] High-sensitivity atomic magnetometer unaffected by spin-exchange relaxation [J].