Piezomagnetic Switching of Nonvolatile Antiferromagnetic States

TL;DR

This paper introduces a novel piezomagnetic switching method for antiferromagnetic states in Mn3Ir-based memory cells, enabling fast, nonvolatile, and deterministic control for spintronic applications.

Contribution

It proposes a new piezomagnetic writing scheme that overcomes speed limitations of traditional methods, utilizing interfacial interactions for robust antiferromagnetic switching.

Findings

Deterministic, nonvolatile switching of antiferromagnetic states achieved.

Switching mechanism involves piezomagnetic effect and Dzyaloshinskii-Moriya interaction.

Potential for energy-efficient, high-speed spintronic memory devices.

Abstract

Prospective spintronic memory and logic devices will benefit from the negligible stray field and ultrafast magnetic dynamics inherent to antiferromagnets [1]. However, realizing isothermal, nonvolatile, and deterministic switching of antiferromagnetic states remains a key challenge [2, 3]. Here, we propose a piezomagnetic writing scheme in triangular Mn3Ir-based memory cells, with readout achieved via the exchange bias effect. Our approach enables deterministic and nonvolatile switching of the antiferromagnetic states, which exhibit exceptional robustness against external perturbations. The switching mechanism is ascribed to piezomagnetic effect of Mn3Ir combined with the interfacial Dzyaloshinskii-Moriya interaction at the antiferromagnet-ferromagnet interface. This scheme overcomes the speed limitations imposed by conventional isothermal methods based on isothermal crystallization mechanism [4]. Our findings highlight the potential of piezomagnetic effects in designing advanced spintronic devices, providing an efficient pathway for manipulating antiferromagnetic states and developing energy-efficient memory technology.