Insight into magnetic, ferroelectric and elastic properties of strained BiFeO{sub 3} thin films through Mössbauer spectroscopy

Journal Article · Mon Jul 25 00:00:00 EDT 2016 · Applied Physics Letters

DOI:https://doi.org/10.1063/1.4959790· OSTI ID:22594444

Agbelele, A.; Jouen, S.; Le Breton, J. -M.; Sando, D. ^[1]; Infante, I. C.; Dkhil, B. ^[2]; Carrétéro, C.; Barthélémy, A.; Bibes, M. ^[1]

---

1. Unité Mixte de Physique CNRS/Thales, 1 av. Fresnel, 91767 Palaiseau & Université Paris-Sud, 91405 Orsay (France)
2. Laboratoire SPMS, Centrale-Supélec, CNRS-UMR 8580, Université Paris-Saclay, 92290 Châtenay-Malabry (France)

We have studied the magnetic order of highly strained (001)-oriented BiFeO{sub 3} (BFO) thin films using {sup 57}Fe Conversion Electron Mössbauer Spectrometry. From 90 K to 620 K the films exhibit a collinear antiferromagnetic structure, in contrast with the cycloidal structure observed in bulk BFO. Moreover, we find that both the planar magnetic anisotropy for compressive strain and out-of-plane anisotropy for tensile strain persist from 90 K up to the Néel temperature (T{sub N}), which itself shows only a weak strain dependence. An analysis of the line asymmetry of the paramagnetic doublet for temperatures above T{sub N} is used to reveal the strain-dependent rotation of the polarization direction, consistent with previous observations. Our results show that the lattice dynamics in BFO films are strongly strain-dependent, offering avenues toward acoustic phonon devices. Finally, we use the versatility of Mössbauer spectroscopy technique to reveal various multi-property features including magnetic states, polarization direction and elastic strain.

• OSTI ID: 22594444
• Journal Information: Applied Physics Letters, Vol. 109, Issue 4; Other Information: (c) 2016 Author(s); Country of input: International Atomic Energy Agency (IAEA); ISSN 0003-6951
• Country of Publication: United States
• Language: English

Related Subjects

71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
ANISOTROPY
ANTIFERROMAGNETISM
ASYMMETRY
BISMUTH COMPOUNDS
CONVERSION
ELASTICITY
ELECTRON SPECTROSCOPY
FERROELECTRIC MATERIALS
IRON 57
IRON OXIDES
MOESSBAUER EFFECT
PARAMAGNETISM
PHONONS
POLARIZATION
ROTATION
STRAINS
THIN FILMS