Ferrofluids as thermal ratchets

Engel A, Muller HW, Reimann P, Jung A (2003)
PHYSICAL REVIEW LETTERS 91(6).

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Abstract
Colloidal suspensions of ferromagnetic nanoparticles, so-called ferrofluids, are shown to be suitable systems to demonstrate and investigate thermal ratchet behavior: By rectifying thermal fluctuations, angular momentum is transferred to a resting ferrofluid from an oscillating magnetic field without net rotating component. Via viscous coupling the noise driven rotation of the microscopic ferromagnetic grains is transmitted to the carrier liquid to yield a macroscopic torque. For a simple setup we analyze the rotation of the ferrofluid theoretically and show that the results are compatible with the outcome of a simple demonstration experiment.
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Engel A, Muller HW, Reimann P, Jung A. Ferrofluids as thermal ratchets. PHYSICAL REVIEW LETTERS. 2003;91(6).
Engel, A., Muller, H. W., Reimann, P., & Jung, A. (2003). Ferrofluids as thermal ratchets. PHYSICAL REVIEW LETTERS, 91(6).
Engel, A., Muller, H. W., Reimann, P., and Jung, A. (2003). Ferrofluids as thermal ratchets. PHYSICAL REVIEW LETTERS 91.
Engel, A., et al., 2003. Ferrofluids as thermal ratchets. PHYSICAL REVIEW LETTERS, 91(6).
A. Engel, et al., “Ferrofluids as thermal ratchets”, PHYSICAL REVIEW LETTERS, vol. 91, 2003.
Engel, A., Muller, H.W., Reimann, P., Jung, A.: Ferrofluids as thermal ratchets. PHYSICAL REVIEW LETTERS. 91, (2003).
Engel, A, Muller, HW, Reimann, Peter, and Jung, A. “Ferrofluids as thermal ratchets”. PHYSICAL REVIEW LETTERS 91.6 (2003).
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12 Citations in Europe PMC

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Engel A, Reimann P., Phys Rev E Stat Nonlin Soft Matter Phys 70(5 Pt 1), 2004
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Comment on "Ferrofluids as thermal ratchets".
Shliomis MI., Phys. Rev. Lett. 92(18), 2004
PMID: 15169540

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