Fig. 4.
Magnetic properties of {Ln2} molecules. a Blocking temperature of magnetization in {Tb2}, {TbGd} and {TbY}; dotted lines are measurements of magnetic susceptibility χ during cooling in the field of 0.2 T, solid lines are measurements during heating in the field of 0.2 T of zero-field cooled samples (sweep rate 5 K min−1, arrows indicate direction of the measurement for each curve), vertical red dotted lines denote TB values; b magnetic hysteresis curves for {Tb2}, sweep rate 9.5 mT s−1; c alignment of Ln magnetic moments in {Ln2} according to ab initio calculations: collinear in {Tb2} and {Dy2}, tilted in {Ho2} (the arrows indicate directions of the single-ion quantization axis for each Ho), easy-plane in {Er2}, in the latter the Ln spins are visualized as ellipsoids; d low-temperature magnetization curves for {TbY}, sweep rate 2.9 mT s−1; the inset shows enhancement of the field range, in which magnetic hysteresis is observed