Journal of Siberian Federal University. Mathematics & Physics / Day Plots of Bacterial Magnetite from Sediments of Shira Lake (Khakassia, Russia)

Full text (.pdf)
Issue
Journal of Siberian Federal University. Mathematics & Physics. 2017 10 (2)
Authors
Semenov, Sergey V.; Balaev, Dmitry A.; Shaykhutdinov, Kirill A.; Rogozin, Denis Yu.
Contact information
Semenov, Sergey V.: Kirensky Institute of Physics SB RAS Akademgorodok, 50/38, Krasnoyarsk, 660036; Siberian Federal University Svobodny, 79, Krasnoyarsk, 660041; ; Balaev, Dmitry A.: Kirensky Institute of Physics SB RAS Akademgorodok, 50/38, Krasnoyarsk, 660036; Siberian Federal University Svobodny, 79, Krasnoyarsk, 660041 Russia; Shaykhutdinov, Kirill A.: Kirensky Institute of Physics SB RAS Akademgorodok, 50/38, Krasnoyarsk, 660036 Russia; Rogozin, Denis Yu.: Institute of Biophysics SB RAS Akademgorodok, 50/50, Krasnoyarsk, 660036 Siberian Federal University Svobodny, 79, Krasnoyarsk, 660041 Russia
Keywords
nanoparticles; magnetic hysteresis; bacterial magnetite
Abstract

The domain state of magnetite detected in sediments of Shira lake (Khakassia, Russia) was examined by means of magnetic hysteresis. Analysis of experimental data obtained on samples from different parts of bottom sediment cores in terms of Day plots allowed us to conclude that magnetite particles are in the pseudo-single-domain state. This indicates respectively small size of magnetite particles (< 100 nm) and reveals their bacterial origin. Biogenic magnetite buried in the bottom sediments can indicate the climatic changes in the Shira lake level in the Late Holocene

Pages
252–256
Paper at repository of SibFU
https://elib.sfu-kras.ru/handle/2311/32138