2009/01/01 by Christian Gollwitzer, Marina Krekhova, Günter Lattermann +2 · 1 citation
Chemistry · Engineering · Materials Science · Mathematics · Physics and Astronomy · #Characterization and Applications of Magnetic Nanoparticles #Chemistry #Condensed matter physics #Geology #Geometry #Material Dynamics and Properties #Materials science #Mathematics #Physical chemistry #Physics #Soft matter #Surface (topology) #Theoretical and Computational Physics
paper · doi:10.1039/b820090d
openalex publication_date 2009/01/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/15
We report on the formation of surface instabilities in a layer of thermoreversible ferrogel when exposed to a vertical magnetic field. Both static and time dependent magnetic fields are employed. Under variations of temperature, the viscoelastic properties of our soft magnetic matter can be tuned. Stress relaxation experiments unveil a stretched exponential scaling of the shear modulus, with an exponent of β = 1/3. The resulting magnetic threshold for the formation of Rosensweig-cusps is measured for different temperatures, and compared with theoretical predictions by S. Bohlius, H. Pleiner and H. R. Brand, J. Phys.: Condens. Matter., 2006, 18, S2671–S2684.