Title
Field-induced ferromagnetism due to magneto-striction in 1-D helical chains
Author
Bikash Kumar Shaw, Mithun Das, Anik Bhattacharyya, Biswa Nath Ghosh, Susmita Roy, Prabhat Mandal, Kari Rissanen, Shouvik Chattopadhyay, Shyamal Kumar Saha
Year
2016
Journal
RSC Advances
Abstract
Two homochiral copper(II) helices, [Cu(μ1,3-N3)(L1)]n (1) and [Cu(μ1,3-NCO)(L2)]n (2), with end-to-end pseudohalide bridges, were synthesized using two N2O donor achiral Schiff bases viaspontaneous chiral resolution. Field-induced ferromagnetic ordering due to magneto-striction in homochiral 1-D helix [Cu(μ1,3-N3)(L1)]n (1) is reported for the first time. At temperatures below 5.5 K, under a magnetic field of 1 T, orthogonality between the magnetic orbitals of copper centres increases significantly due to the contraction of lattice parameters, giving rise to long-range ferromagnetic ordering in the helical chain. The magneto-dielectric results are also indicative of the observed magneto-striction effect in the present complex 1. We believe that this study will uncover a new way to invoke long-range ferromagnetic ordering in 1-D helical chains.
Instrument
J-810
Keywords
Circular dichroism, Materials, Inorganic chemistry