Dresden 2026 – scientific programme

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MA: Fachverband Magnetismus

MA 3: Complex Magnetic Oxides

MA 3.5: Talk

Monday, March 9, 2026, 10:30–10:45, POT/0112

Unveiling the Origins of Strong Magnetostriction in Cobalt Ferrite using neutron scattering. — •Guratinder Kaur — School of Physics and Astronomy, The University of Edinburgh, UK

Cobalt ferrite (CoFe2O4, CFO) stands out among advanced functional materials due to its exceptional magnetostrictive behaviour. This property allows its shape to be influenced by its magnetic state, making it desirable for various technological applications such as electronic devices, ferrofluids, magnetic drug delivery, microwave devices, and high-density information storage1-3. The present study provides a comprehensive investigation using neutron diffraction to explore the interplay between CFO's nuclear and magnetic structures4 across varying temperatures. This study complements our recent inelastic neutron scattering (INS) experiments on single crystal and powder samples. The combined data, along with our INS findings and developed excitonic theory, will provide a deeper understanding of the underlying mechanism responsible for CFO's strong magnetostrictive effect5. This knowledge will be valuable for designing novel materials with precisely controlled magnetostrictive properties for applications in areas like sensors and actuators6. References: 1)*Slonczewski J C, Phys. Rev. 110 1341 (1958). 2)*Zheng H et al., Science 303 661 (2004). 3)*Bhame S D et al., J. Appl. Phys. 100 113911 (2006). 4)*Teillet et al., J. Mag. Magn. Mater. 123, 93 (1993). 5)*Lane et al., Adv. Funct. Mater. 2025, e16830. 6)*Chen Y, et al., IEEE Trans. Magn. 35 3652 (1999).

Keywords: magnetostriction; Spinel; Neutron scattering; X ray diffraction; Magnetoelastic coupling