Electric-Potential-Induced Complete Control of Magnetization in MnZnSb Metallic Ferromagnets

Greve, MM and Das, B and Issac, I and Witte, R and Wang, D and Kruk, R and Hahn, H and Dasgupta, S (2021) Electric-Potential-Induced Complete Control of Magnetization in MnZnSb Metallic Ferromagnets. In: Advanced Electronic Materials, 7 (1).

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Abstract

Magnetoelectric coupling refers to electric-field control of magnetism, which may offer low-power memory and beyond-CMOS electronics. However, contenders of magnetic phase change materials, such as the dilute magnetic semiconductors (DMS), show weak ferromagnetism whereas the ultra-small screening lengths of robust metallic magnets in artificially stacked thin film heterostructures reduce the extent of controllable magnetization to sub-atomic distances, thereby diminishing the sheer magnitude of the tunable magnetization. In contrast, an electrochemical control of magnetization has recently been proposed where reversible electrochemistry/ion-exchange is used to control magnetism in bulk ferromagnets. However, so far, ionic control of magnetism is limited to spinel ferrites and highly correlated oxide systems. Here, it is reported that the ionic control of magnetism can be extended to metallic ferromagnets; complete and reversible switching of ferromagnetism is demonstrated in bulk MnZnSb intermetallic compounds at room temperature. An electrochemically controlled reversible tuning of magnetization across the magnetic phase transition temperature is demonstrated. The observed phenomenon can be explained by the distortion of the crystal lattice, upon Li-ion insertion into the MnZnSb interstitial sites, accompanied by a change in the magnetic moment of the manganese ions; acting together, both these effects lead to the collapse of the ferromagnetic order in MnZnSb. © 2020 Wiley-VCH GmbH

Item Type:	Journal Article
Publication:	Advanced Electronic Materials
Publisher:	Blackwell Publishing Ltd
Additional Information:	The copyright for this article belongs to Blackwell Publishing Ltd.
Keywords:	Antimony compounds; Diluted magnetic semiconductors; Electric fields; Electric potential; Electrochemistry; Ferromagnetic materials; Lithium compounds; Magnetic moments; Magnetization; Magnets; Manganese compounds; Phase change materials; Zinc compounds, Dilute magnetic semiconductors; Electric-field control; Electrochemical control; Ferromagnetic orderings; Magnetic phase transitions; Magnetoelectric couplings; Metallic ferromagnets; Reversible switching, Ferromagnetism
Department/Centre:	Division of Mechanical Sciences > Materials Engineering (formerly Metallurgy)
Date Deposited:	09 Mar 2023 06:36
Last Modified:	09 Mar 2023 06:36
URI:	https://eprints.iisc.ac.in/id/eprint/80892

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