Article ID Journal Published Year Pages File Type
5491072 Journal of Magnetism and Magnetic Materials 2017 6 Pages PDF
Abstract
We investigated slow relaxations of the magnetostriction and residual magnetostriction of the phase-separated system (Eu1−xGdx)0.6Sr0.4MnO3, in which the metamagnetic transition from a paramagnetic insulating state to a ferromagnetic metallic state is accompanied by a lattice shrinkage. The relaxations are well fitted by a stretched exponential function, suggesting the strong frustration between the double exchange interaction and Jahn-Teller effect. We have revealed that the Gd substitution suppresses the frozen phase-separated phase at low temperatures and stabilizes the paramagnetic insulating state in the dynamic phase-separated phase at intermediate temperatures. The former origin would be the randomness effect and the latter would be the suppression of the double exchange interaction.
Related Topics
Physical Sciences and Engineering Physics and Astronomy Condensed Matter Physics
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