Target Bubbles in Fe<sub>3</sub>Sn<sub>2</sub> Nanodisks at Zero Magnetic Field.
basic_science · Level V
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- Record sourced from PubMed, PMID 32806036.
- Also identified by DOI 10.1021/acsnano.0c04036.
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Abstract
We report a vortex-like magnetic configuration in uniaxial ferromagnet Fe<sub>3</sub>Sn<sub>2</sub> nanodisks using differential phase contrast scanning transmission electron microscopy. This magnetic configuration is transferred from a conventional magnetic vortex using a zero-magnetic-field warming process and is characterized by a series of concentric cylinder domains. We termed them as "target bubbles" that are identified as three-dimensional depth-modulated magnetic objects in combination with numerical simulations. Target bubbles have room-temperature stability even at zero magnetic field and multiple stable magnetic configurations. These advantages render the target bubble an ideal bit to be an information carrier and can advance magnetic target bubbles toward functionalities in the long term by incorporating emergent degrees of freedom and purely electrically controllable magnetism.