Publikationsdatum:
2015-05-09
Beschreibung:
Polycrystalline Ba 0.5 Sr 1.5 Co 2 (Fe 1− x Al x ) 12 O 22 ( x = 0, 0.04, 0.08, and 0.12) hexaferrites were prepared by conventional solid-state reaction method and the magnetic field dependences of magnetic and magnetoelectric properties were investigated. With Al doping ( x = 0.04, 0.08), much enhanced ferroelectric polarization and abnormal magnetodielectric properties can be observed at a low applied magnetic field and be maintained down to zero field at 200 K, which may result from the occurrence of field-induced spin transverse cone structure. The magnetoelectric coefficient increases from 500 ps/m to 1481 ps/m with increasing x value from 0.04 to 0.08. These results suggest that Al ions play an effective role in modifying the magnetoelectricity of hexaferrites.
Print ISSN:
0002-7820
Digitale ISSN:
1551-2916
Thema:
Maschinenbau
