Synthesis and room temperature four-state memory prototype of Sr₃Co₂Fe₂₄O₄₁ multiferroics

Abstract

Multiferroics exhibit both ferroelectricity and ferromagnetism. The combination of ferroelectricity and ferromagnetism in single phase offers the ability to obtain four physical polarization states, i.e., two electric polarization combined with two magnetic polarization states, achieving four-state memory devices. The four-state memory devices can exponentially increase data storage capacity. In this letter, we synthesized single phase Sr3Co2Fe24O41, which exhibits ferroelectricity, ferromagnetism, and magnetoelectric coupling effect at room temperature. The as-prepared Sr3Co2Fe24O41 was used as a four-state memory prototype. The information was written by electric and magnetic fields, and read out by magnetoelectric coefficient (alpha(E)) with the help of a small bias magnetic field. (C) 2012 American Institute of Physics. [http://dx.doi.org/10.1063/1.4753973]National Basic Research Program of China [2011CBA00508]; National Natural Science Foundation of China [91022020, 21021061, 21073145

Spin reorientation transition and near room-temperature multiferroic properties in a W-type hexaferrite SrZn1.15Co0.85Fe16O27

“…10 Up to now, multiferroic properties have been found in Y-, Z-, M-, and U-type hexaferrites. [11][12][13][14][15][16][17][18][19][20][21][22] Noticeably, large magnetoelectric effects are even observed around room temperature in some M-, U-, and Z-type hexaferrites, which sheds light on the practical applications of magnetoelectric multiferroics. 13,14,17,22 However, to our best knowledge, there are few reports about the multiferroic properties in W-type hexaferrites.…”

Dielectric relaxation, resonance and scaling behaviors in Sr3Co2Fe24O41 hexaferrite

“…Although the magnetic and magnetoelectric properties of the Z-type hexaferrites have been intensively studied in the recent years23457891011, only few works have been reported on the dielectric properties of Z-type hexaferrites. The composition dependent dielectric properties of Z-type hexaferrite Ba 3 Co 2 Fe 24 O 41 have been reported121314.…”

Multiferroic and Magnetoelectric Hexagonal Ferrites

“…7.25) [97]. Other authors have suggested that a four state memory could be achieved with SCZ using two oppositely polarised magnetic and two oppositely polarised electrical states to act as a four state memory [98].…”