Field-Induced Magnetic Order in Frustrated TbBaCo₄O₇Single Crystals

Abstract

We present results of dc magnetic susceptibility measurements in TbBaCo4O7 single crystals performed at temperatures in the range 2-300 K and in magnetic fields up to 55 kOe. The results obtained seem to suggest that the ground state of TbBaCo4O7 is composed of coexisting long-range ordered and short-range ordered clusters and is transformed into a magnetically ordered weak ferromagnetic phase by application high magnetic field along c-axis.

Structural invariance upon antiferromagnetic ordering in geometrically frustrated swedenborgite, CaBaCo2Fe2O7

“…So far, however, most investigations on transition metal based swedenborgites have been performed on polycrystalline powders. It is only recently that data have been obtained from single crystals of, for example, YBaCo 3 AlO 7 (Valldor et al, 2008), YBaCo 4 O 7+ (Manuel et al, 2009;Izquierdo et al, 2010), HoBaCo 4 O 7 (Juarez-Arellano et al, 2009), TbBaCo 4 O 7 (Szymczak et al, 2010), YBaCo 3 FeO 7 , CaBaFe 4 O 7 (Hollmann et al, 2011) and YBaMn 3 AlO 7 (Valldor & Breunig, 2011), of which all but YBaCo 4 O 7+ and CaBaFe 4 O 7 are reported as hexagonal at room temperature. A powder sample of the title compound has been reported (Valldor, 2004b), but only its crystal structure and composition were presented.…”