Layered transition metal molecular magnets studied with implanted muons

We have carried out magnetic measurements on the layered magnets Ni 2 (OH) 3 (N(CN) 2 ) ( NiAM ), Co 5 (OH) 8 (N(CN) 2 ) 2 ·6H 2 O ( CoAM ), Co 5 (OH) 8 (C 12 H 25 SO 4 ) 2 ·2NH 3 ( CoDOS ), and Co 5 (OH) 8 (C 7 H 15 CO 2 ) 2 ·4H 2 O ( CoCAP ), using various experimental methods, including muon spin relaxation (μSR). We find phase transitions at temperatures T m in all the samples, characterized by a change in the magnetic susceptibilty and loss of initial muon spin polarization.