# Magnetization-polarization cross-control near room temperature in hexaferrite single crystals

## TL;DR

This study demonstrates near-room-temperature electric control of magnetization in a Y-type hexaferrite single crystal, advancing the potential for low-power multiferroic device applications.

## Contribution

The paper reports the stabilization of a ferrimagnetic and ferroelectric phase up to 450K and electric field-induced reversal of magnetization at near-room temperature in a single crystal.

## Key findings

- Magnetization can be reversed by electric field near room temperature.
- A ferrimagnetic and ferroelectric phase exists up to 450K.
- Magnetic domains manipulated by electric field visualized by magnetic force microscopy.

## Abstract

Mutual control of the electricity and magnetism in terms of magnetic (H) and electric (E) fields, the magnetoelectric (ME) effect, offers versatile low power-consumption alternatives to current data storage, logic gate, and spintronic devices. Despite its importance, E-field control over magnetization (M) with significant magnitude was observed only at low temperatures. Here we have successfully stabilized a simultaneously ferrimagnetic and ferroelectric phase in a Y-type hexaferrite single crystal up to T=450K and demonstrated the reversal of large non-volatile M by E field close to room temperature. Manipulation of the magnetic domains by E field is directly visualized at room temperature by using magnetic force microscopy. The present achievement provides an important step towards the application of bulk ME multiferroics.