The Influence of Morphology on Magnetic Properties of Magnetosomes
A. Hashima, M. Molčana, J. Kovača, Z. Varchulováb, H. Gojzewskic, M. Makowskic, d, P. Kopčanskya, Z. Tomoria and M. Timkoa
aInstitute of Experimental Physics, SAS, Watsonova 47, 040 01 Kosice, Slovakia
bInstitute of Medical Biology and Genetics, Faculty of Medicine UK, Sasinkova 4, 811 08 Bratislava, Slovakia
cInstitute of Physics, Poznań University of Technology, Nieszawska 13A, 60-965 Poznań, Poland
dMax Planck Institute for Polymer Research, Ackermannweg 10, 55128 Mainz, Germany
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Cultivation process was changed three times. The culture medium was enriched by more amount ferric quinate (FQ magnetosomes sample) and more amounts Wolfe's vitamin solution (WVS magnetosomes sample) comparing to normal culture medium (NP magnetosomes sample). NP sample of magnetosomes shows zero coercivity and behaves superparamagnetically. The increase of coercivity (6.5 Oe for WVS and 20 Oe for FQ) may be caused by higher value of shape anisotropy and reveals stronger magnetic correlations between particles of magnetite chains.
DOI: 10.12693/APhysPolA.121.1250
PACS numbers: 47.65.Cb, 51.60.+a, 75.30.Gw, 75.50.Tt, 75.60.Nt, 75.60.Ej