Direct observation of temperature dependent magnetic domain structure of the multiferroic La0.66Sr0.34MnO3/BiFeO3 bilayer system by x-ray linear dichroism- and x-ray magnetic circular dichroism-photoemission electron microscopy | Zendy

Christian Mix | Zendy; Simone Finizio | Zendy; M. Buzzi | Zendy; Florian Kronast | Zendy; F. Nolting | Zendy; G. Jakob | Zendy; Mathias Kläui | Zendy

Open Access

Direct observation of temperature dependent magnetic domain structure of the multiferroic La0.66Sr0.34MnO3/BiFeO3 bilayer system by x-ray linear dichroism- and x-ray magnetic circular dichroism-photoemission electron microscopy

Author(s) -

Christian Mix,

Simone Finizio,

M. Buzzi,

Florian Kronast,

F. Nolting,

G. Jakob,

Mathias Kläui

Publication year - 2014

Publication title -

journal of applied physics

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.699

H-Index - 319

eISSN - 1089-7550

pISSN - 0021-8979

DOI - 10.1063/1.4876300

Subject(s) - photoemission electron microscopy , magnetic circular dichroism , linear dichroism , multiferroics , ferromagnetism , materials science , condensed matter physics , bilayer , magnetic domain , thin film , photoemission spectroscopy , crystallography , circular dichroism , nuclear magnetic resonance , electron microscope , ferroelectricity , x ray photoelectron spectroscopy , magnetization , optics , chemistry , nanotechnology , optoelectronics , physics , magnetic field , membrane , dielectric , spectral line , biochemistry , quantum mechanics , astronomy

Low-thickness La0.66Sr0.34MnO3 (LSMO)/BiFeO3 (BFO) thin film samples deposited on SrTiO3 were imaged by high resolution x-ray microscopy at different temperatures. The ultra-thin thickness of the top layer allows to image both the ferromagnetic domain structure of LSMO and the multiferroic domain structure of the buried BFO layer, opening a path to a direct observation of coupling at the interface on a microscopic level. By comparing the domain size and structure of the BFO and LSMO, we observed that, in contrast to LSMO single layers, LSMO/BFO multilayers show a strong temperature dependence of the ferromagnetic domain structure of the LSMO. Particularly, at 40 K, a similar domain size for BFO and LSMO is observed. This indicates a persistence of exchange coupling on the microscopic scale at a temperature, where the exchange bias as determined by magnetometer measurements is vanishing.

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