Hysteresis loss free soft magnetic ferrites based on Larmor precession

doi:10.1088/1674-1056/acbdec

Abstract A big enough transverse magnetic field applied to soft magnetic ferrite toroid can magnetize the ferrite to a saturation level in transverse direction and almost completely suppresses magnetic domain structures in the ferrite, the response to the longitudinal alternating electromagnetic field changes from the original domain wall displacements and spin rotations to the precession of magnetization around the transverse field, and the hysteresis loss disappears in the ferrites. Both theoretical and experimental results indicate that the permeability and magnetic loss in the ferrite can be controlled by adjusting the transverse magnetic field. A higher Q value with relatively low permeability can be achieved by increasing the transverse field, which ensures that the ferrite can be operated at high frequencies, with magnetic loss being very low.

Keywords: ferrites Larmor precession magnetic losses hysteresis loss free

Received: 18 November 2022
Revised: 17 February 2023
Accepted manuscript online: 22 February 2023

PACS:	75.50.Gg	(Ferrimagnetics)
	75.30.Cr	(Saturation moments and magnetic susceptibilities)

Fund: Project supported by the National Key Research and Development Program of China(Grant Nos.2022YFB3504800 and 2021YFB3502400), the Key Research and Development Plan of Anhui Province, China (Grant No.202003c08020012), and the Key Program of Education Department of Anhui Province, China (Grant No.KJ2019ZD03).

Corresponding Authors: Shuang-Jiu Feng
E-mail: fengsj@ahu.edu.cn

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Shuang-Jiu Feng(冯双久), Xin-Li Zhao(赵幸丽), Shou-Jin Zhu(朱守金),Qing-Rong Lv(吕庆荣), Xu-Cai Kan(阚绪材), and Xian-Song Liu(刘先松) Hysteresis loss free soft magnetic ferrites based on Larmor precession 2023 Chin. Phys. B 32 087503

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Hysteresis loss free soft magnetic ferrites based on Larmor precession

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