Room Temperature Magnetoelectric Effects on Single Slabs of Z-type Hexaferrites

Details Room Temperature Magnetoelectric Effects on Single Slabs of Z-type Hexaferrites Room Temperature Magnetoelectric Effects on Single Slabs of Z-type Hexaferrites

2011-11-23

arxiv.org/abs/1111.5556v1

MRS 2011 Proceeding-Boston, MA

Physics

Condensed Matter

Materials Science

5 pages, 3 figures

Scientific paper

In this paper, magnetoelectric effects of Sr Z-type hexaferrite, Sr3Fe24Co2O41, at room temperature is measured. The change in remanence magnetization was measured by applying a DC voltage or electric field across a slab of hexaferrite. Changes of ~ 18% in remanence was observed in an electric field of 10,000V/cm implying a similar change in the microwave permeability at frequencies below 3GHz. In these types of measurements high resistivity is critical in order to reduce current flow in the hexaferrite. The resistivity of the hexaferrite was raised to 4.28x10^8 ohm?-cm by annealing under oxygen pressure. The measurements indicate that indeed electric polarization and magnetization changes were induced by the application of magnetic and electric fields, respectively. The implications for microwave applications appear to be very promising at room temperature.

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