Magnetic properties of Gd3+ ions in the spatially distributed DNA molecules

Magnetic properties of DNA liquid-crystal dispersions are experimentally investigated by SQUID magnetometer. The magnetic susceptibility of pure DNA and DNA doped by La, and Gd is measured in the region 4.2-300 K. The total magnetic moment is represented as a sum of: the paramagnetic part and negati...

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Bibliographic Details
Published in:arXiv.org 2013-09
Main Authors: Nikiforov, V N, Kuznetsov, V D, Yevdokimov, Yu M, V Yu Irkhin
Format: Article
Language:English
Subjects:
Deoxyribonucleic acid
Diamagnetism
DNA
Gadolinium
Magnetic moments
Magnetic permeability
Magnetic properties
Magnetism
Superconducting quantum interference devices
Temperature dependence
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Summary:Magnetic properties of DNA liquid-crystal dispersions are experimentally investigated by SQUID magnetometer. The magnetic susceptibility of pure DNA and DNA doped by La, and Gd is measured in the region 4.2-300 K. The total magnetic moment is represented as a sum of: the paramagnetic part and negative diamagnetic part. The number of paramagnetic Gd3+ ions is calculated in a good agreement with the number of phosphate complexes. The temperature dependence of magnetic susceptibility indicates the presence of interaction between Gd3+ magnetic moments, which is discussed in terms of long-range RKKY-type exchange in one-dimensional metals.
ISSN:2331-8422
DOI:10.48550/arxiv.1309.4281