Chirality and Magnetocaloricity in GdFeTeO6 as Compared to GdGaTeO6
authors Zvereva, E; Vasilchikova, T; Evstigneeva, M; Tyureva, A; Nalbandyan, V; Goncalves, J; Barone, P; Stroppa, A; Vasiliev, A
nationality International
author keywords chirality; magnetocaloricity; metaloxide
keywords PBSB2O6; CO
abstract GdFeTeO6 and GdGaTeO6 have been prepared and their structures refined by the Rietveld method. Both are superstructures of the rosiaite type (space group P3 over bar 1c). Their thermodynamic properties have been investigated by means of magnetization M and specific heat C-p measurements, evidencing the formation of the long-range antiferromagnetic order at T-N = 2.4 K in the former compound and paramagnetic behavior down to 2 K in the latter compound. Large magnetocaloric effect allows considering GdFeTeO6 for the magnetic refrigeration at liquid hydrogen stage. Density functional theory calculations produce estimations of leading Gd-Gd, Gd-Fe and Fe-Fe interactions suggesting unique chiral 120 & DEG; magnetic structure of Fe3+ (S = 5/2) moments and Gd3+ (J = 7/2) moments rotating in opposite directions (clockwise/anticlockwise) within weakly coupled layers of the rosiaite type crystal structure.

publisher MDPI
isbn 1996-1944
year published 2021
volume 14
issue 20
digital object identifier (doi) 10.3390/ma14205954
web of science category 11
subject category Chemistry, Physical; Materials Science, Multidisciplinary; Metallurgy & Metallurgical Engineering; Physics, Applied; Physics, Condensed Matter
unique article identifier WOS:000712873500001
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journal impact factor 3.057
5 year journal impact factor 3.424
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