Flexible paramagnetic membranes in fast precessing fields
- Northwestern Univ., Evanston, IL (United States). Dept. of Materials Science and Engineering; Univ. Autónoma de Yucatán, Mérida (Mexico). Faculty of Mathematics; Univ. Nacional Autonoma de Mexico (UNAM), Mexico City (Mexico). Inst. of Mathematics
- Northwestern Univ., Evanston, IL (United States). Dept. of Materials Science and Engineering. Dept. of Physics and Astronomy
Elastic membranes composed of paramagnetic beads offer the possibility of assembling versatile actuators operated autonomously by external magnetic fields. Here we develop a theoretical framework to study shapes of such paramagnetic membranes under the influence of a fast precessing magnetic field. Their conformations are determined by the competition of the elastic and magnetic energies, arising as a result of their bending and the induced dipolar interactions between nearest-neighbors beads. In the harmonic approximation, the elastic energy is quadratic in the surface curvatures. To account for the magnetic energy we introduce a continuum limit energy, quadratic in the projections of the surface tangents onto the precession axis. We derive the Euler-Lagrange equation governing the equilibria of these membranes, as well as the corresponding stresses. We apply this framework to examine paramagnetic membranes with quasiplanar, cylindrical, and helicoidal geometries. In all cases we found that their shape, energy, and stresses can be modified by means of the parameters of the magnetic field, mainly by the angle of precession.
- Research Organization:
- Energy Frontier Research Centers (EFRC) (United States). Center for Bio-Inspired Energy Science (CBES); Northwestern Univ., Evanston, IL (United States)
- Sponsoring Organization:
- USDOE Office of Science (SC), Basic Energy Sciences (BES)
- Grant/Contract Number:
- SC0000989
- OSTI ID:
- 1541216
- Alternate ID(s):
- OSTI ID: 1469266
- Journal Information:
- Physical Review. E, Vol. 98, Issue 3; ISSN 2470-0045
- Publisher:
- American Physical Society (APS)Copyright Statement
- Country of Publication:
- United States
- Language:
- English
Web of Science
Actuation of magnetoelastic membranes in precessing magnetic fields
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journal | January 2019 |
Spontaneous deformation of flexible ferromagnetic ribbons induced by Dzyaloshinskii-Moriya interaction
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journal | October 2019 |
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