Skip to Main content Skip to Navigation
Journal articles

Magnetoelastic and magnetoelectric couplings across the antiferromagnetic transition in multiferroic BiFeO 3

Abstract : Clear anomalies in the lattice thermal expansion (deviation from linear variation) and elastic properties (soft-ening of the sound velocity) at the antiferromagnetic-to-paramagnetic transition are observed in the prototypical multiferroic BiFeO 3 using a combination of picosecond acoustic pump-probe and high-temperature x-ray-diffraction experiments. Similar anomalies are also evidenced using second-principles calculations supporting our experimental findings. Those calculations, in addition to a simple Landau-like model we also developed, allow us to understand the elastic softening and lattice change at T N as a result of magnetostriction combined with electrostrictive and magnetoelectric couplings, which renormalize the elastic constants of the high-temperature reference phase when the critical T N temperature is reached.
Complete list of metadatas

Cited literature [55 references]  Display  Hide  Download

https://hal-centralesupelec.archives-ouvertes.fr/hal-02108984
Contributor : Christine Vinée-Jacquin <>
Submitted on : Monday, September 21, 2020 - 2:29:32 PM
Last modification on : Thursday, September 24, 2020 - 7:34:33 AM

File

spinphononBFO_v6.pdf
Files produced by the author(s)

Identifiers

Citation

Mariusz Lejman, Charles Paillard, Vincent Juvé, Gwenäelle Vaudel, Nicolas Guiblin, et al.. Magnetoelastic and magnetoelectric couplings across the antiferromagnetic transition in multiferroic BiFeO 3. Physical Review B: Condensed Matter and Materials Physics, American Physical Society, 2019, 99 (10), ⟨10.1103/PhysRevB.99.104103⟩. ⟨hal-02108984⟩

Share

Metrics

Record views

397

Files downloads

4