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Magnetic field dependence of the effective permittivity in BaTiO3/Ni nanocomposites observed via microwave spectroscopy

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2 Author(s)
Castel, V. ; Laboratoire d’Electronique et Systèmes de Télécommunications, Université de Bretagne Occidentale, 29238 Brest, France ; Brosseau, C.

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We demonstrate large increases of the real and imaginary parts of the microwave effective complex permittivity of a series of (piezoelectric)BaTiO3/(magnetostrictive) Ni nanocomposites under the action of a magnetic field, by about 10% at 2 kOe and 300% at 5 kOe, respectively. We suggest that the magnetic field dependence of the effective permittivity is consistent with a magnetoelectric effect which can be qualitatively understood within a model in which the piezoelectric phase is mechanically coupled to the magnetostrictive phase.

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Applied Physics Letters  (Volume:92 ,  Issue: 23 )