Thermally mediated multiferroic composites for the magnetoelectric materials

Lu, S. G.; Fang, Z.; Furman, E.; Wang, Y.; Zhang, Q. M.; Mudryk, Y.; Gschneidner, K. A.; Pecharsky, V. K.; Nan, C. W.
March 2010
Applied Physics Letters;3/8/2010, Vol. 96 Issue 10, p102902
Academic Journal
A magnetoelectric (ME) composite through thermal mediation is presented, which is different from the traditional strain/stress mediated ME composites. The ME laminate uses the large magnetocaloric effect, that is, a temperature change induced in the ferromagnetic Gd crystal by a magnetic field, and a large pyroelectric response in the relaxor ferroelectric polymer. Consequently, a simple laminate composite can produce a ME response ∼0.5 V/(cm Oe). The ME coefficient was further enhanced to ∼0.9 V/(cm Oe) by exploiting the magnetic flux concentration effect. The approach opens up an avenue in developing ME materials for broad range of applications.


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