01454nas a2200229 4500008004100000022001400041245009900055210006900154260000800223300001600231490000700247520070500254100001700959700001700976700001700993700002301010700001501033700001801048700002201066700002101088856011501109 2018 eng d a0020-166900aMetamagnetism in nanosheets of Co-II-MOF with T-N at 26 K and a giant hysteretic effect at 5 K0 aMetamagnetism in nanosheets of CoIIMOF with TN at 26 K and a gia cDEC a15044-150470 v573 aHerein, we have synthesized at room-temperature two-dimensional nanosheets of a MOF comprised of cobalt(II) ion with benzenedicarboxylic acid ligand, which exhibited unusual magnetic properties. Direct-current magnetic susceptibility revealed an anti-ferromagnetic (AFM) transition at 26 K (Neel temperature, T-N) followed by a canting of the spin moments along with the concomitant appearance of a sigmoidal-shaped magnetization versus field (M-H) curve at 15 K. Such a canted AFM ordering led to nonzero remnant magnetization with a remarkably high coercive field of similar to 10 kOe at 5 K. Metamagnetism was further: substantiated by the alternating-current magnetic susceptibility measurements.1 aGupta, Kriti1 aDadwal, Arun1 aRana, Shammi1 aJha, Plawan, Kumar1 aJain, Anil1 aYusuf, S., M.1 aJoy, Pattayil, A.1 aBallav, Nirmalya uhttps://library.ncl.res.in/content/metamagnetism-nanosheets-co-ii-mof-t-n-26-k-and-giant-hysteretic-effect-5-k02899nas a2200157 4500008004100000245005900041210005800100260004400158490000900202520236600211100001702577700001702594700001802611700002102629856009102650 2020 eng d00aMagnetism in bimetallic NiII-CoII coordination polymer0 aMagnetism in bimetallic NiIICoII coordination polymer bAmerican Institute of Physics Inc.cNOV0 v22653 a

Co-BDC ([Co2(OH)2BDC], H2BDC = 1,4-benzenedicarboxylic acid) is known to possess metamagnetism originating from the antiparallel spins and high magneto crystalline anisotropy of Co(II).1 Herein, we have introduced a bimetallic concept by incorporating Ni(II) along with Co(II) in the same coordination polymer to modulate the magneto crystalline anisotropy in the lattice which in turn, affects the overall magnetic response of the coordination polymer. The Curie-Weiss equation fit suggested antiparallel arrangement of the spins (θ ≈ -62.5 K) of Ni(II) and Co(II) arranged in alternate fashion. The cusp in magnetization was observed at 7 K (Tc) with a significant coercive field of ∼750 Oe at 5 K.

1 aGupta, Kriti1 aDadwal, Arun1 aJoy, Pattayil1 aBallav, Nirmalya uhttps://library.ncl.res.in/content/magnetism-bimetallic-niii-coii-coordination-polymer