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Multifunctional Oxide Heterostructures$
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Evgeny Y. Tsymbal, Elbio R. A. Dagotto, Chang-Beom Eom, and Ramamoorthy Ramesh

Print publication date: 2012

Print ISBN-13: 9780199584123

Published to Oxford Scholarship Online: January 2013

DOI: 10.1093/acprof:oso/9780199584123.001.0001

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Magnetoelectric coupling and multiferroic materials

Magnetoelectric coupling and multiferroic materials

(p.38) 2 Magnetoelectric coupling and multiferroic materials
Multifunctional Oxide Heterostructures

Gustau Catalan

James F. Scott

Oxford University Press

Magnetoelectric materials are those where the magnetism can be affected by an external electric field, or, conversely, those where electric polarization is affected by a magnetic field. Many magnetoelectric materials are multiferroic, meaning that they simultaneously possess spontaneous ferroelectric and magnetic ordering, but this is not an essential requirement. Magnetoelectrics and multiferroics have become an important area of research on account of their interesting fundamental science and potentially useful applications in memory devices and magnetovoltaic transducers. This chapter reviews the types of magnetoelectric coupling that exist, the magnitude of the effect and its limits, the types of materials that have it, and how is it measured. Throughout, the chapter emphasizes points that are usually overlooked in the literature, such as non-oxide materials, fundamental differences between linear and quadratic coupling, or experimental artifacts in measurements.

Keywords:   magnetoelectrics, multiferroics, composites, relaxors, biquadratic coupling, domain walls, experimental artifacts

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