Field‐Dependent Magnetoelectric Effects in Polycrystalline Co2Y‐Type Ba0.5Sr1.5Co2(Fe1−xAlx)12O22 Hexaferrites. Issue 8 (8th May 2015)

• Record Type: Journal Article
• Authors: Wu, Meixia; Gao, Xingsen; Liu, Zhongwu; Joy, P.
• Is Part Of: Journal of the American Ceramic Society. Volume 98:Issue 8(2015)
• Page Start: 2498
• Page End: 2502
• Publication Date: 2015-05-08
• Subjects: Ceramics -- Periodicals; 620.1405
• DOI: 10.1111/jace.13637
• Languages: English
• ISSNs: 0002-7820

Abstract

<abstract abstract-type="main" id="jace13637-abs-0001"> <title> <x xml:space="preserve">Abstract</x> </title> <p>Polycrystalline Ba_0.5Sr_1.5Co₂(Fe_{1−<italic>x</italic>}Al_{<italic>x</italic>})₁₂O₂₂ (<italic>x </italic>=<italic> </italic>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 (<italic>x </italic>=<italic> </italic>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 <italic>x</italic> value from 0.04 to 0.08. These results suggest that Al ions play an effective role in modifying the magnetoelectricity of hexaferrites.</p> </abstract>