Hydrothermally synthesized oxalate and phenanthroline based ferrimagnetic one-dimensional spin chain molecular magnets [{Fe(Δ)Fe(Λ)}1−x{Cr(Δ)Cr(Λ)}x(ox)2(phen)2]n (x = 0, 0.1 and 0.5) with giant coercivity of 3.2 Tesla

Abstract

Hydrothermally synthesized oxalate and phenanthroline based ferrimagnetic one-dimensional spin chain molecular magnets [{Fe(D)Fe(L)} 1Àx {Cr(D) Cr(L)} x (ox) 2 (phen) 2 ] n (x ¼ 0, 0.1 and 0.5) with giant coercivity of 3.2 Tesla

Octahedral Lattice Distortion-Driven Ferroelectricity and Canted Antiferromagnetism in Oxalate and Phenanthrolin Ligand-Based Chain Molecular Magnets [{Fe(Δ)Fe(Λ)}1–x{Cr(Δ)Cr(Λ)}x(ox)2(phen)2]n (x = 0, 0.1, and 0.5)

“…Well-defined Bragg peaks are observed in the neutron diffraction patterns. No significant change is observed in the intensities of the Bragg peaks down to 15 K. The magnetization data also suggest that the compound is paramagnetic at 15 K. However, the diffraction pattern at 2 K, when the compound is in the magnetic state, shows an extra peak (001) around ∼13° along with enhancement in the other Bragg peak intensities. Therefore, the neutron diffraction patterns of the compound up to 15 K belong to the paramagnetic state, and an enhancement of Bragg peaks will appear in the neutron diffraction patterns after the magnetic ordering sets below the transition temperature of the compounds which is 8.7 K for the x = 0 compound.…”

“…The room-temperature X-ray and neutron diffraction studies revealed the 1D nature of chains comprising alternating Fe 1 (Δ)- and Fe 2 (Λ)-assembled building units. The dc magnetization measurements showed spontaneous magnetization below ∼9 K. The transition temperatures were found to be ∼8.7, 8.2, and 4.0 K for x = 0, 0.1, and 0.5 compounds, respectively . However, the magnetization versus magnetic field curves for all these compounds did not show any saturation even under an applied magnetic field of 9 T and could be associated with a canted AFM behavior.…”

“…The hydrothermal synthesis of compounds [{Fe­(Δ)­Fe­(Λ)} 1– x {Cr­(Δ)­Cr­(Λ)} x (ox) 2 (phen) 2 ] n with x = 0, 0.1, and 0.5 was reported previously . Hydrothermal synthesis methods are commonly used for preparation of nanomaterials or nanocrystals.…”

“…In our previous work, we reported the synthesis of the oxalate and π-functional (phenanthroline) ligand-based molecular magnets [{Fe­(Δ)­Fe­(Λ)} 1– x {Cr­(Δ)­Cr­(Λ)} x (ox) 2 (phen) 2 ] n ( x = 0, 0.1, and 0.5) using the hydrothermal method and investigated their structural and magnetic properties . The room-temperature X-ray and neutron diffraction studies revealed the 1D nature of chains comprising alternating Fe 1 (Δ)- and Fe 2 (Λ)-assembled building units.…”

Magnetic Exchange Interaction in Nitronyl Nitroxide Radical-Based Single Crystals of 3d Metal Complexes: A Combined Experimental and Theoretical Study

“…For example, the compounds synthesized using nitronyl nitroxides, imino nitroxides, and butyl nitroxide ligands with metal ions {metal­(II) bis-hexafluoroacetylacetonate} form chains (1-D), layers (2-D), and bulk networks (3-D). In this regard, we have synthesized molecule-based magnets of Prussian blue analogues, chain molecular magnets, and single-molecule magnets using coprecipitation and hydrothermal methods. − …”