Unipolar electric-field-controlled nonvolatile multistate magnetic memory in FeRh/(001)PMN-PT heterostructures over a broad temperature span

• 作者: Kaiming Qiao Fengxia Hu Hu Zhang Ziyuan Yu Xianliang Liu Yuhang Liang Yi Long Jing Wang Jirong Sun Tongyun Zhao Baogen Shen
• 来源期刊: 中国科学：物理学 力学 天文学（英文版）
• 年，卷（期）: 2022,（1）
• 所属期刊栏目: Article
• 页码范围: 78-83
• 页数: 6页
• 语种: 英文

摘要

Multistate magnetic memory effect in heterostructures composed of FeRh thin films with antiferromagnetic (AFM)-ferro-magnetic (FM) phase transition and (001)-oriented PMN-PT substrates has been investigated.Utilizing a unipolar electric field,the nonvolatile change in magnetization was nearly doubled compared with that obtained utilizing a conventional bipolar bias.Four stable nonvolatile magnetic states were obtained over a broad temperature span,from 320 to 390 K,by adjusting the amplitude of the unipolar electric pulses,demonstrating the possibility of realizing a multistate nonvolatile magnetic memory in the FeRh/PMN-PT heterostructures.This work provides a new strategy for enhancing the magnetic response by utilizing unipolar electric fields and promotes the utilization of AFM-FM phase transition materials in multifunctional information storage and novel spintronic devices.