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  • 2019 Conference on Lasers and Electro-Optics Europe and European Quantum Electronics Conference
  • OSA Technical Digest (Optica Publishing Group, 2019),
  • paper ee_p_17

Spins dynamics across metal-insulator transition in Fe3O4 films

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Abstract

Metal insulator transitions (MIT) are an interesting phenomenon occurring in metal oxide characterized by the change of conductivity by orders of magnitude. Hence, such correlated systems are intensively studied due to potential application in oxide electronics but also due to fundamental questions arising from the interplay between their different degrees of freedom. In case of Fe3O4, the MIT at the so-called Verwey temperature (Tv~120K) has been hardly debated. In this framework, a recent picture of the insulating phase has been proposed based on the existence of trimerons network [1]. To go deeper in the mechanisms underlying such transitions, out of equilibrium studies are well suited. De Jong et al. demonstrate, by X-ray resonant diffraction, the trimerons network partial destruction upon laser pulses excitation [2]. Another paper focused on the electrons dynamics at Verwey neighborhood which confirms the appearance of phase separation in a specific excitation regime [3]. To our knowledge, we propose here the first magnetization dynamics study across Verwey transition.

© 2019 IEEE

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