Improved room-temperature magnetoelectric effect and crystal structure in polycrystalline BaSrCo2Fe11AlO22
- 8 February 2021
- journal article
- research article
- Published by AIP Publishing in Applied Physics Letters
- Vol. 118 (6), 062407
- https://doi.org/10.1063/5.0037741
Abstract
The crystal structure and the magnetoelectric (ME) effect were investigated in highly c-axis oriented polycrystalline samples of Y-type hexaferrite, BaSrCo2Fe11AlO22, fabricated using a rotating magnetic field. A detailed crystal structure was determined using a combination of scanning transmission electron microscopy and single crystal x-ray diffraction. It was revealed that Co and Al ions, which play important roles in the performance of the ME effect, reside mainly on the Fe site in the S block of the Y-type hexaferrite. In the oriented samples, electric polarization induced by applying a magnetic field reached 140 μC/m2 at 200 K and 51 μC/m2 at 300 K; consequently, the ME coefficient αH was estimated to be 7200 ps/m at 300 K. The ME performance of the oriented samples is superior to that of nonoriented polycrystalline samples and comparable with that of single crystals. Furthermore, the oriented samples allow the control of magnetization by an electric field up to 325 K. These results facilitate further investigations on room-temperature multiferroics and their practical applications.Funding Information
- Japan Society for the Promotion of Science (JP17H01143)
- Japan Society for the Promotion of Science (JP19H05823)
This publication has 38 references indexed in Scilit:
- The evolution of multiferroicsNature Reviews Materials, 2016
- Multiferroics of spin originReports on Progress in Physics, 2014
- Room-temperature multiferroic magnetoelectricsNPG Asia Materials, 2013
- Magnetoelectric effects at microwave frequencies on Z-type hexaferriteApplied Physics Letters, 2012
- Multiferroic-Type Hexaferrites with a Room-Temperature Conical State and Magnetically Controllable Spin HelicityPhysical Review Letters, 2010
- Electrostatically tunable magnetoelectric inductors with large inductance tunabilityApplied Physics Letters, 2009
- Towards a magnetoelectric memoryNature Materials, 2008
- Multiferroics: a magnetic twist for ferroelectricityNature Materials, 2007
- Electric Polarization Rotation in a Hexaferrite with Long-Wavelength Magnetic StructuresPhysical Review Letters, 2005
- Magnetic control of ferroelectric polarizationNature, 2003