反铁磁Fe<sub>3</sub>BO<sub>6</sub>中自发交换偏置效应调控研究

doi:10.11896/cldb.25010021

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Abstract The continuous modularity of the exchange bias field is crucial to the wide application of the corresponding exchange bias effect. In this work, we found a giant spontaneous exchange bias (SEB) effect in the Fe₃BO₆ polycrystal samples and modulated it by controlling the annealing temperature. The spontaneous exchange bias field H_SEB exhibits an obvious biphasic response to the annealing temperature, i.e., increasing first and then decreasing with increasing the annealing temperature. The maximum value of the H_SEB reaches up to approximately 4.024×10⁶/(4π) A/m at 1 023 K annealing temperature. Analysis and discussions of the mechanism demonstrate that the annealing temperature-dependent H_SEB property originated from the modulation of the strength of the exchange coupling between the weak ferromagnetism of the surface state and the antiferromagnetism of the bulk state. This study will facilitate the efficient attainment of the desired value for specific devices designed following the SEB effect.

Key words： antiferromagnetic material Fe₃BO₆ spontaneous exchange bias effect exchange coupling surface state

Published: Online: 2026-02-13

CLC number:

O469

Corresponding Authors: hexiong@ctgu.edu.cn

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	Articles by authors
	WANG Lifeng
	HE Lu
	LIANG Youyuan
	SUN Jiawei
	CAI Ling
	LI Shiqi
	HE Xiong
	XU Yunli
	XIA Zhengcai
	PAN Liqing

Cite this article:

WANG Lifeng,HE Lu,LIANG Youyuan, et al. Modulation of Spontaneous Exchange Bias in Antiferromagnetic Fe₃BO₆[J]. Materials Reports, 2026, 40(3): 25010021-5.

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https://www.mater-rep.com/EN/10.11896/cldb.25010021 OR https://www.mater-rep.com/EN/Y2026/V40/I3/25010021

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