Magnetic Properties and Magnetocaloric Effect in Tb2FeCrO6 Double Perovskite Oxide

Cs2Fe2(MoO4)3─A Strongly Frustrated Magnet with Orbital Degrees of Freedom and Magnetocaloric Properties

“…These parameters are moderately lower compared to selected rare-earth containing molybdates below their spin-glass transition temperatures, e.g., RE 2 Mo 2 O 7 with RE = Er, Dy, and Gd, with − ΔS m,max (7 T, ≈ 10 K) = 12–15 J kg –1 K –1 . The double perovskite Tb 2 FeCrO 6 orders antiferromagnetically at 8.5 K and exhibits a MC effect with −Δ S m,max (0 to 7 T) = 12.9 J kg –1 K –1 . In contrast to such traditional rare-earth containing magnetocaloric materials based on cooling in the vicinity of a rather sharp phase transition, strongly frustrated magnets ensure enhanced magnetocaloric parameters smoothly changing over a broad temperature range.…”

“… 51 The double perovskite Tb 2 FeCrO 6 orders antiferromagnetically at 8.5 K and exhibits a MC effect with −Δ S m,max (0 to 7 T) = 12.9 J kg –1 K –1 . 52 In contrast to such traditional rare-earth containing magnetocaloric materials based on cooling in the vicinity of a rather sharp phase transition, strongly frustrated magnets ensure enhanced magnetocaloric parameters smoothly changing over a broad temperature range. For the trillium lattice, Na[Mn(HCOO) 3 ], MC parameters have been derived for a local maximum in the vicinity of a magnetic disorder–order transition at 220–290 mK, above T N .…”