Synergistic Co 2 O 3 /Bi 2 O 3 co-doping in MnZn ferrites for ultra-low magnetic noise shielding in quantum precision measurements
Abstract
MnZn ferrite, characterized by the low power loss, the high electrical resistivity, and the high magnetic permeability, is a promising candidate for the low-noise magnetic shielding applications. However, as the dissipative material, MnZn ferrites inherently generate a magnetic noise, which fundamentally limits the sensitivity of the magnetometers operating in the spin-exchange relaxation-free (SERF) regime. Herein, we report a synergistic co-doping strategy using Co2O3 and Bi2O3 to effectively suppress the intrinsic magnetic noise of MnZn ferrites. By systematically tuning the concentrations of Co2O3 and Bi2O3, the power loss, complex magnetic permeability, and microstructural evolution of undoped, singly doped, and co-doped MnZn ferrites are comprehensively investigated. Notably, co-doping with 1600 ppm Co2O3 and 400 ppm Bi2O3 reduces the low-frequency magnetic noise by more than 50%, which is attributed to refined grain boundary structures and suppressed hysteresis losses. The optimized MnZn ferrite is further employed to fabricate a magnetic shield for a SERF magnetometer, achieving a single-channel sensitivity of 0.25 fT/Hz1/2. This study paves an effective materials-engineering route to minimize magnetic noise in ferrite-based shielding systems, providing a solid foundation for the development of next-generation ultra low-noise platforms for the quantum precision measurements.
Related
- Doping effect of Ho on the structural, optical, ac electrical transport and magnetic properties of Mg–Zn ferrites nanoparticles
- Ultrasonic chemical synthesis of zinc-manganese ferrites with improved magnetic properties.
- Carbon Nanotube-Induced Magnetic Shielding Effects on 129Xe NMR from Equivariant Neural Networks
- Synergistic enhancement of magnetic, dielectric, and optical properties in vanadium-substituted LaMnO3 multiferroics
- Pluronic F-127-functionalized magnetic ternary hybrid nanoparticles for co-delivery of paclitaxel and psoralen: a synergistic strategy to overcome multidrug resistance in triple-negative breast cancer
BibTeX
@article{sun2026synergistic,
title = {{Synergistic Co 2 O 3 /Bi 2 O 3 co-doping in MnZn ferrites for ultra-low magnetic noise shielding in quantum precision measurements}},
author = {Bowen Sun and Yueyang Zhai and Sateesh Bandaru and Tianshi Cheng and Yongsen Huang and Kun Chen and Shiqiang Zheng and Bangcheng Han and Jianli Li and Danyue Ma and Fan Wu and Wenhuan Huang},
journal = {Nano Research},
year = {2026},
month = may,
doi = {10.26599/nr.2026.94908875},
url = {https://doi.org/10.26599/nr.2026.94908875},
note = {CC BY},
}
RIS
TY - JOUR
TI - Synergistic Co 2 O 3 /Bi 2 O 3 co-doping in MnZn ferrites for ultra-low magnetic noise shielding in quantum precision measurements
AU - Bowen Sun
AU - Yueyang Zhai
AU - Sateesh Bandaru
AU - Tianshi Cheng
AU - Yongsen Huang
AU - Kun Chen
AU - Shiqiang Zheng
AU - Bangcheng Han
AU - Jianli Li
AU - Danyue Ma
AU - Fan Wu
AU - Wenhuan Huang
PY - 2026
DA - 2026/05/28
JO - Nano Research
DO - 10.26599/nr.2026.94908875
UR - https://doi.org/10.26599/nr.2026.94908875
AB - MnZn ferrite, characterized by the low power loss, the high electrical resistivity, and the high magnetic permeability, is a promising candidate for the low-noise magnetic shielding applications. However, as the dissipative material, MnZn ferrites inherently generate a magnetic noise, which fundamentally limits the sensitivity of the magnetometers operating in the spin-exchange relaxation-free (SERF) regime. Herein, we report a synergistic co-doping strategy using Co2O3 and Bi2O3 to effectively suppress the intrinsic magnetic noise of MnZn ferrites. By systematically tuning the concentrations of Co2O3 and Bi2O3, the power loss, complex magnetic permeability, and microstructural evolution of undoped, singly doped, and co-doped MnZn ferrites are comprehensively investigated. Notably, co-doping with 1600 ppm Co2O3 and 400 ppm Bi2O3 reduces the low-frequency magnetic noise by more than 50%, which is attributed to refined grain boundary structures and suppressed hysteresis losses. The optimized MnZn ferrite is further employed to fabricate a magnetic shield for a SERF magnetometer, achieving a single-channel sensitivity of 0.25 fT/Hz1/2. This study paves an effective materials-engineering route to minimize magnetic noise in ferrite-based shielding systems, providing a solid foundation for the development of next-generation ultra low-noise platforms for the quantum precision measurements.
SN - 1998-0000
SN - 1998-0124
ER -