Showing papers by "Miguel A. Novak published in 2015"
TL;DR: Two isostructural 1D complexes, M(hfac)2NaphNN and NaphNN, were synthesized and exhibit very strong antiferromagnetic metal-radical exchange coupling.
Abstract: Two isostructural 1D complexes, [M(hfac)2NaphNN]n [M = Mn(II) (1) or Co(II) (2); NaphNN = 1-naphthyl nitronylnitroxide], were synthesized and exhibit very strong antiferromagnetic metal-radical exchange coupling Compound 2 shows slow magnetic relaxation behavior with a high blocking temperature (TB ≈ 132 K) and a very high coercive field of 49 kOe at 40 K
60 citations
TL;DR: In this article, aqueous solution formed by different molar ratios between the nickel and manganese chlorides led to the formation of antiferromagnetic NiO/ferrimagnetic NiMn2O4 oxide composites, as determined by X-ray powder diffraction technique and Rietveld refinement.
11 citations
TL;DR: In this paper, the structure of a coordination polymer was solved by using synchrotron X-ray powder diffraction and the knowledge of the structure allowed the quantification of the intrachain magnetic interaction.
Abstract: In this work we describe the structure of a coordination polymer, which was solved by using synchrotron X-ray powder diffraction. The heterometallic CuII–MnII compound, [Cu2Mn2(bopba)(DMSO)7]·DMSO, was assembled from a binuclear oxamato copper(II) complex and manganese(II) ions, generating a Mn–Cu–Mn–Cu– chain motif. Each chain is connected to two others, resulting in a folded two-dimensional coordination network where the uncoordinated DMSO molecule is located in the space between the layers. The loss of the DMSO molecules leads to the loss of both crystallinity and long range magnetic order. The knowledge of the structure allowed the quantification of the intrachain magnetic interaction.
5 citations
TL;DR: The 5d-4f compound shows an extended 1D structure and the AC magnetic measurements reveal frequency dependence at low temperature suggesting slow relaxation of the magnetization.
Abstract: The use of the mononuclear rhenium(IV) precursor [ReBr5(H2pydc)]− (H2pydc=3,5-pyridinedicarboxylic acid) as a metalloligand towards dysprosium(III) afforded the first heterobimetallic ReIV–DyIII complex. Crystal structures and static and dynamic magnetic properties of both rhenium-containing species are reported herein. The 5d–4f compound shows an extended 1D structure and the AC magnetic measurements reveal frequency dependence at low temperature suggesting slow relaxation of the magnetization.
4 citations