Spin-lattice coupling in multiferroic Pb(Fe1/2Nb1/2)O3 thin films

Abstract

We have made magnetization and x-ray diffraction measurements on an epitaxial Pb(Fe1/2Nb1/2)O3 200 nm film. From the temperature dependence of the out-of-plane lattice parameter we can assign a Burns' temperature at Td ~ 640 K, a temperature at T* ~ 510 K, related to the appearance of static polar nanoregions, and an anomaly occurring at 200 K. The latter is precisely the Néel temperature TN determined from magnetization and points to spin-lattice coupling at TN ~ 200 K. We also observe "weak ferromagnetism" up to 300K and propose superantiferromagnetic clusters as a plausible scenario to explain this hysteresis above TN.

12 pages, 4 figures

References in corpus (1)

• Spin-Orbit Coupling and Ion Displacements in Multiferroic TbMnO3

Cited by in corpus (6)

• Multifunctional Magnetoelectric Materials for Device Applications
• Magnetic and magnetoelectric studies in pure and cation doped BiFeO3
• Room-temperature paramagnetoelectric effect in magnetoelectric multiferroics Pb(Fe1/2Nb1/2)O3 and its solid solution with PbTiO3
• Magnetoelectric effect in antiferromagnetic multiferroic Pb(Fe1/2Nb1/2)O3 and its solid solutions with PbTiO3
• Epitaxial growth and magnetoelectric relaxor behavior in multiferroic 0.8Pb(Fe1/2Nb1/2)O3-0.2Pb(Mg1/2W1/2)O3 thin films
• Geometrical origin of ferrimagnetism and superparamagnetism in Fe-based double perovskite multiferroics