Exceptionally large magneto-optical response in dispersions of plate-like nanocrystallites and magnetic nanoparticles
We introduce a binary colloidal system with an exceptionally strong magneto-optical response. Its induced optical birefringence at even low magnetic fields (in the mT range) reaches a value with the same order of magnitude as that of nematic liquid crystals. This system is based on a binary mixture...
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| Main Authors: | , , , , , , , |
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| Format: | Article (Journal) |
| Language: | English |
| Published: |
1 June 2017
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| In: |
Journal of magnetism and magnetic materials
Year: 2016, Volume: 431, Pages: 79-83 |
| ISSN: | 1873-4766 |
| DOI: | 10.1016/j.jmmm.2016.07.053 |
| Online Access: | Verlag, Volltext: http://dx.doi.org/10.1016/j.jmmm.2016.07.053 Verlag, Volltext: http://www.sciencedirect.com/science/article/pii/S0304885316315670 
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| Author Notes: | Kathrin May, Alexey Eremin, Ralf Stannarius, Balázs Szabó, Tamás Börzsönyi, Ingo Appel, Silke Behrens, Susanne Klein |
| Summary: | We introduce a binary colloidal system with an exceptionally strong magneto-optical response. Its induced optical birefringence at even low magnetic fields (in the mT range) reaches a value with the same order of magnitude as that of nematic liquid crystals. This system is based on a binary mixture of plate-like, non-magnetic pigment nanoparticles and a small volume fraction (<1v%) of spherical magnetic nanoparticles. In the field-free state, the suspension is isotropic. Birefringence is caused by an alignment of the pigment platelets, commanded by shape-anisotropic agglomerates of the magnetic nanoparticles in an external magnetic field. We give a semiquantitative discussion about this. |
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| Item Description: | Available online 2 August 2016 Gesehen am 31.10.2018 |
| Physical Description: | Online Resource |
| ISSN: | 1873-4766 |
| DOI: | 10.1016/j.jmmm.2016.07.053 |