Magneto‐active liquid crystal elastomers (LCEs) are accessible by the incorporation of superparamagnetic Fe 3 O 4 nanoparticles into oriented nematic side‐chain LCEs and offer a contactless activation pathway to the nematic‐to‐isotrope transition by local magnetic heating in external fields. In magneto‐mechanical measurements, a sample contraction of up to 30% is observed under field influence, with full reversibility when the field is switched off. The load evolved reaches 60 kPa and more. The ability of the materials to respond to a contactless electromagnetic stimulus with a well‐defined contraction can be of use for various actuator applications.
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Winkler et al. (2010) studied this question.
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