Biasing a ferronematic - a new way to detect weak magnetic field.
basic_science · Level V
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- Record sourced from PubMed, PMID 27296792.
- Also identified by DOI 10.1039/c6sm00354k.
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Abstract
The magnetic properties of a ferronematic, i.e., a nematic liquid crystal doped with magnetic nanoparticles in low volume concentration are studied, with the focus on the ac magnetic susceptibility. A weak dc bias magnetic field (a few Oe) applied to the ferronematic in its isotropic phase increases the ac magnetic susceptibility considerably. Passage of the isotropic-to-nematic phase transition resets this enhancement irreversibly (unless the dc bias field is applied again in the isotropic phase).