On the correlation of the magnetic properties with the structural parameters in Fe-doped europium chromite

In the present work, the dynamics of the spins and the structural parameters of thermal treated samples of Eu1−xFexCrO3 (x = 0, 0.1 and 0.2) were investigated. The ac-magnetic susceptibility (χac) was measured near TN for frequencies (f) in the range 10 - 104 Hz, magnitude of the ac magnetic field o...

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Bibliographic Details
Published in:AIP advances 2021-03, Vol.11 (3), p.035205-035205-5
Main Authors: Ratkovski, D. R., Ramírez, J. M. Marín, França, E. L. T., Franco, A., Machado, F. L. A.
Format: Article
Language:English
Subjects:
Chromite
Europium
Lattice parameters
Magnetic permeability
Magnetic properties
Relaxation time
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Summary:In the present work, the dynamics of the spins and the structural parameters of thermal treated samples of Eu1−xFexCrO3 (x = 0, 0.1 and 0.2) were investigated. The ac-magnetic susceptibility (χac) was measured near TN for frequencies (f) in the range 10 - 104 Hz, magnitude of the ac magnetic field of 10 Oe and for 5 ≤ T ≤ 300 K. X-ray diffraction data were used for determining the lattice parameters and the bonding angle θB (Cr– O(2) – Cr) for 100 ≤ T ≤ 300 K. The maximum in χac was found to shift to higher values of T for increasing values of f. The Vogel-Fulcher law was used for analyzing χac yielding values for the characteristic relaxation time τ0, activation energy Ea/kB and glassy temperature TG, respectively, in the ranges 2.10 - 3.96 ps, 46.5 - 47.2 K and 169.9 -176.1 K. The super-exchange parameter J∼cos4180−θB/2/d7, where d is the length of the bound Cr-O(2), was also obtained yielding a good correlation with the corresponding values of TN.
ISSN:2158-3226
2158-3226
DOI:10.1063/9.0000010