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Your search keyword '"Iafarova, A. F."' showing total 4 results
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4 results on '"Iafarova, A. F."'

2. Microscopic spin Hamiltonian for a dipolar-Heisenberg magnet LiGdF4 from EPR measurements

Author

Sosin, S. S., Iafarova, A. F., Romanova, I. V., Morozov, O. A., Korableva, S. L., Batulin, R. G., Zhitomirsky, M., and Glazkov, V. N.

Subjects
Condensed Matter - Strongly Correlated Electrons
Abstract

Low-temperature electron paramagnetic resonance measurements are performed on single crystals of LiY_{1-x}Gd_xF_4 with weak x=0.005 and moderate x=0.05 concentration of Gd ions. Modeling of the experimental spectra allows us to precisely determine microscopic parameters of the spin Hamiltonian of the parent LiGdF4 material, including the nearest-neighbor exchange constant. The obtained parameters are further tested by comparing a strongly anisotropic Curie-Weiss temperature obtained for LiGdF4 in our static magnetization measurements with theoretically computed values. We find a fine balance between principal magnetic interactions in LiGdF4, which results in a hidden magnetic frustration presumably leading to a delayed magnetic ordering and an enhanced magnetocaloric effect at low temperatures., Comment: 6 pages, 6 figures

Published
2022
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4. Microscopic Spin Hamiltonian for a Dipolar Heisenberg Magnet LiGdF4 from EPR Measurements.

Author

Sosin, S. S., Iafarova, A. F., Romanova, I. V., Morozov, O. A., Korableva, S. L., Batulin, R. G., Zhitomirsky, M., and Glazkov, V. N.

Subjects
MAGNETOCALORIC effects, ELECTRON paramagnetic resonance, MAGNETIZATION measurement, SINGLE crystals, LOW temperatures, HYPERFINE structure
Abstract

Low-temperature electron paramagnetic resonance measurements are performed on single crystals of LiY1 ‒xGdxF4 with low and moderate concentration of Gd ions. Modeling of the experimental spectra allows us to precisely determine microscopic parameters of the spin Hamiltonian of the parent LiGdF4 material, including the nearest-neighbor exchange constant. The obtained parameters are further tested by comparing a strongly anisotropic Curie–Weiss temperature obtained for LiGdF4 in our static magnetization measurements with theoretically computed values. We find a fine balance between principal magnetic interactions in LiGdF4, which results in a hidden magnetic frustration presumably leading to a delayed magnetic ordering and an enhanced magnetocaloric effect at low temperatures. [ABSTRACT FROM AUTHOR]

Published
2022
Full Text
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