Multiferroic phase of doped delafossite identified using inelastic neutron scattering
Physical Review B—Condensed Matter and Materials Physics, 2010•APS
We report inelastic neutron scattering measurements that provide a distinct dynamical
“fingerprint” for the multiferroic ground state of 3.5% Ga-doped CuFeO 2. The complex
ground state is stabilized by the displacement of the oxygen atoms, which contribute to the
multiferroic coupling predicted in the “spin-driven” model. By comparing the observed and
calculated spectrum of spin excitations, we conclude that the magnetic ground state is a
distorted screw-type spin configuration with a distribution of turn angles.
“fingerprint” for the multiferroic ground state of 3.5% Ga-doped CuFeO 2. The complex
ground state is stabilized by the displacement of the oxygen atoms, which contribute to the
multiferroic coupling predicted in the “spin-driven” model. By comparing the observed and
calculated spectrum of spin excitations, we conclude that the magnetic ground state is a
distorted screw-type spin configuration with a distribution of turn angles.
We report inelastic neutron scattering measurements that provide a distinct dynamical “fingerprint” for the multiferroic ground state of 3.5% Ga-doped . The complex ground state is stabilized by the displacement of the oxygen atoms, which contribute to the multiferroic coupling predicted in the “spin-driven” model. By comparing the observed and calculated spectrum of spin excitations, we conclude that the magnetic ground state is a distorted screw-type spin configuration with a distribution of turn angles.
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