Quantitative Imaging of Exotic Antiferromagnetic Spin Cycloids in <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline" overflow="scroll"><mml:msub><mml:mrow><mml:mi>Bi</mml:mi><mml:mi>Fe</mml:mi><mml:mi mathvariant="normal">O</mml:mi></mml:mrow><mml:mn>3</mml:mn></mml:msub></mml:math> Thin Films - Archive ouverte HAL Access content directly
Journal Articles Physical Review Applied Year : 2022

Quantitative Imaging of Exotic Antiferromagnetic Spin Cycloids in BiFeO3 Thin Films

Hai Zhong
Aurore Finco
Johanna Fischer
Angela Haykal
Florian Godel
Patrick Maletinsky
  • Function : Author
Mathieu Munsch
  • Function : Author
V Garcia


BiFeO3 is a rich room-temperature multiferroic material in which noncollinear antiferromagnetic spin cycloids can be deterministically controlled by an electric field through the magnetoelectric interaction, opening perspectives for low-power reconfigurable antiferromagnetic spintronics. Using a commercial scanning nitrogen-vacancy (N-V) magnetometer, we are able to image two different types of spin cycloids stabilized in strain-engineered BiFeO3 epitaxial thin films. We show that, in these samples harboring two ferroelectric variants, each ferroelectric domain is coupled to a single spin cycloid, giving rise to a zigzag magnetic pattern. These ferroelectric domains can be manipulated at the local scale by piezoresponse force microscopy, allowing the design of micron-sized single domains. Thanks to its coupled optical microscope and fast-imaging capabilities, the scanning N-V magnetometer enables a quick repositioning in such areas of interest. Finally, quantitative imaging on single ferroelectric domains provides insights into the physical parameters of each spin-cycloid type and their impact on the magnetic-stray-field measurements.
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hal-03656679 , version 1 (02-05-2022)



Hai Zhong, Aurore Finco, Johanna Fischer, Angela Haykal, Karim Bouzehouane, et al.. Quantitative Imaging of Exotic Antiferromagnetic Spin Cycloids in BiFeO3 Thin Films. Physical Review Applied, 2022, 17, ⟨10.1103/physrevapplied.17.044051⟩. ⟨hal-03656679⟩
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