Journal of the American Chemical Society, Vol.130, No.1, 24-24, 2008
Giant coercivity in a one-dimensional cobalt-radical coordination magnet
A metal-radical polymer (Co(hfac)(2) BPNN] showed a very large coercive field of 52 kOe (4.1 MA m(-1)) at 6 K, indicating that it is the hardest magnet ever reported. Above 10 K, a soft character appeared, owing to the fast dynamics of magnetization reorientation.