Abstract

The first observation of magnetic resonance field shifts proportional to an applied electric field in a magnetically ordered material is reported. It involves ferromagnetic resonance experiments on lithium ferrite crystals in an applied electric field at temperatures between 4.2 and 77\ifmmode^\circ\else\textdegree\fi{}K. The observed shifts are predicted by using statically measured values of the electric field derivative of the uniaxial anisotropy energy existing in the "skin" region of these crystals.

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