Frozen‐In Magnetic Order in Uniaxial Magnetic Gels: Preparation and Physical Properties | Zendy

Collin Dominique | Zendy; Auernhammer Günter K. | Zendy; Gavat Odile | Zendy; Martinoty Philippe | Zendy; Brand Helmut R. | Zendy

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Frozen‐In Magnetic Order in Uniaxial Magnetic Gels: Preparation and Physical Properties

Author(s) -

Collin Dominique,

Auernhammer Günter K.,

Gavat Odile,

Martinoty Philippe,

Brand Helmut R.

Publication year - 2003

Publication title -

macromolecular rapid communications

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 1.348

H-Index - 154

eISSN - 1521-3927

pISSN - 1022-1336

DOI - 10.1002/marc.200350016

Subject(s) - anisotropy , isotropy , materials science , magnetic field , homogeneous , shear modulus , ferromagnetism , magnetic anisotropy , magnetic nanoparticles , magnetization , characterization (materials science) , condensed matter physics , elastic modulus , orientation (vector space) , magnetostatics , nuclear magnetic resonance , composite material , optics , nanotechnology , physics , nanoparticle , thermodynamics , geometry , quantum mechanics , mathematics

We describe the preparation and characterization of uniaxial magnetic gels. Fibril formation of the embedded magnetic particles generates easily detectable magnetic and optical anisotropies. A finite magnetization is frozen‐in and leads to a ferromagnetic‐like response in small homogeneous external magnetic fields. We present, for the first time, frequency dependent measurements of the shear modulus G ′. Despite their optical and magnetic anisotropy, the gels are mechanically isotropic.The time‐dependent G ′ for a ferrogel in the parallel orientation in a homogeneous field of 200 mT.

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