Overview
Research has identified multiferroicity and voltage-controlled magnetism at room temperature in stacked two-dimensional (2D) materials. Multiferroics are defined as materials that concurrently exhibit two or more ferroic orders, which are stable arrangements of physical properties. These orders are distinguished by their capacity for switching via an external stimulus. The identified properties suggest potential applications across various technological domains.
Research Context
Multiferroic materials are recognized for their intrinsic capability to host multiple ferroic orders simultaneously. This characteristic positions them as candidates for advanced technological development. Specific areas where multiferroic properties could be advantageous include non-volatile, low-power memory devices; spintronic devices; miniaturized electronics; neuromorphic hardware; sensors; and magnetoelectric devices.
Findings
The investigation of stacked 2D materials revealed the presence of multiferroicity. This multiferroicity was observed at room temperature. A significant associated finding was the demonstration of voltage-controlled magnetism within these materials. The simultaneous exhibition of multiple ferroic orders, which can be switched using an external stimulus, is a defining characteristic of multiferroics. The properties observed in the stacked 2D materials align with this definition, particularly at room temperature.
Why This Matters
The identification of multiferroicity, coupled with voltage-controlled magnetism, in stacked 2D materials at room temperature is relevant for the development of various technologies. These include non-volatile, low-power memory devices; spintronic devices; miniaturized electronics; neuromorphic hardware; sensors; and magnetoelectric devices. The ability of these materials to simultaneously exhibit and switch multiple ferroic orders under external stimuli under ambient conditions directly addresses requirements for these advanced applications.