TY - JOUR
T1 - Ultrasound attenuation in ferrofluids
AU - Shliomis, Mark
AU - Mond, Michael
AU - Morozov, Konstantin
PY - 2008/8/15
Y1 - 2008/8/15
N2 - The absorption of acoustic energy by internal degrees of freedom of short chains is proposed as a new viable mechanism of ultrasound attenuation in ferrofluids. It is demonstrated that even though the volume fraction of the chains may be quite small, such an effect may reach the order of magnitude of viscous damping. In addition, by investigating the statistical properties of dimers in ferrofluids, it is shown that an applied magnetic field modifies the sound attenuation in a highly anisotropic manner. The proposed mechanism provides new insight into the fundamental issue of colloidal response, and, in particular, may lead to its utilization in novel experimental concepts.
AB - The absorption of acoustic energy by internal degrees of freedom of short chains is proposed as a new viable mechanism of ultrasound attenuation in ferrofluids. It is demonstrated that even though the volume fraction of the chains may be quite small, such an effect may reach the order of magnitude of viscous damping. In addition, by investigating the statistical properties of dimers in ferrofluids, it is shown that an applied magnetic field modifies the sound attenuation in a highly anisotropic manner. The proposed mechanism provides new insight into the fundamental issue of colloidal response, and, in particular, may lead to its utilization in novel experimental concepts.
UR - http://www.scopus.com/inward/record.url?scp=49749088858&partnerID=8YFLogxK
U2 - 10.1103/PhysRevLett.101.074505
DO - 10.1103/PhysRevLett.101.074505
M3 - Article
C2 - 18764543
AN - SCOPUS:49749088858
SN - 0031-9007
VL - 101
JO - Physical Review Letters
JF - Physical Review Letters
IS - 7
M1 - 074505
ER -