Paramagnetic properties of Cuban red mud at low temperatures

Authors

DOI:

https://doi.org/10.7494/geol.2018.44.4.373

Keywords:

iron ores, metals oxides, ESR, low temperatures

Abstract

The electron spin resonance (ESR) spectra of Cuban red mud have been measured at three different temperatures: 295 K, 150 K and 77 K. The broad absorption line with resonance fields ∼(1.7–1.8) kOe was observed at all temperatures with values of g-factor from 3.602 to 4.020. The temperature decrease resulted in an absorption line appearance with resonance fields of 3.252 kOe (g = 2.067) at 150 K and 3.339 kOe (g = 2.086) at 77 K. The ESR-signal amplitude with resonance fields ∼(1.7–1.8) kOe decreases and the ESR-signal amplitude in the field ∼3.3 kОе increases with reduction in temperature.

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Author Biography

Valentyna Shvets, Institute of Vocational Education

Education

1980 - Diploma with honors in mathematics and physics from the State Pedagogical Institute (Г-II № № 048504, Kryywyi Rih, Ukraine). After completing my second-degree studies, I received a referral for third degree, doctoral studies.
1980-1984 - Doctoral studies in physical chemistry at the Institute of General and Inorganic Chemistry M.S. Kurnakowa (Moscow, Russia).
1988 - Doctoral dissertation "Electronic structure and electronic spectra of transition metal dimers" (diploma № 020420).
1994 - Assistant professor of physics title (diploma № 005528).

Experience:

Lecturer in physics and mathematics at the universities of Ukraine (technical and pedagogical);
Deputy director of the Television University;
Head of the Distance Education Center.
Last position occupied: Leading laboratory scientist with the creation of electronic textbooks of the Institute for Vocational and Technical Education of the Academy of Pedagogical Sciences of Ukraine (Kiev).

Publications:

I am the author of 20 scientific publications in the field of physics and physical chemistry
The publications were published in international journals from the Journal's list
Citation Reports:
Chemical Physics Letters, Journal of Molecular Structure THEOCHEM, Journal of
Structural Chemistry, Russian Chemical Bulletin, Chemical Engineering Journal.

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Published

2018-12-06

How to Cite

Shvets, V. (2018). Paramagnetic properties of Cuban red mud at low temperatures. Geology, Geophysics and Environment, 44(4), 373. https://doi.org/10.7494/geol.2018.44.4.373

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