Syntheses, crystal structures and magnetic properties of a series of ZnII2LnIII2 compounds (Ln = Gd, Tb, Dy, Ho and Er): contrasting structural and magnetic features

2018 ◽  
Vol 42 (19) ◽  
pp. 15917-15929 ◽  
Author(s):  
Sagar Ghosh ◽  
Nairita Hari ◽  
Dawid Pinkowicz ◽  
Magdalena Fitta ◽  
Sasankasekhar Mohanta
Keyword(s):  
Magnetic Properties ◽  
Bond Length ◽  
Crystal Structures ◽  
Atomic Number ◽  
Slow Relaxation ◽  
Magnetic Features

In the five ZnII2LnIII2 compounds – (i) the TbIII and ErIII analogues show slow relaxation of the magnetization, while the HoIII system and, surprisingly, the DyIII analogue don’t; (ii) the GdIII system shows the MCE; and (iii) interestingly, the Ln–O bond length increases with the increase of atomic number.

scholarly journals New Cyanido-Bridged Heterometallic 3d-4f 1D Coordination Polymers: Synthesis, Crystal Structures and Magnetic Properties

2021 ◽  
Vol 7 (5) ◽  
pp. 57
Author(s):  
Diana Dragancea ◽  
Ghenadie Novitchi ◽  
Augustin M. Mădălan ◽  
Marius Andruh
Keyword(s):  
Magnetic Properties ◽  
Crystal Structures ◽  
Coordination Polymers ◽  
Building Block ◽  
Condensation Reaction ◽  
Slow Relaxation ◽  
Block Approach

Three new 1D cyanido-bridged 3d-4f coordination polymers, {[Gd(L)(H2O)2Fe(CN)6]·H2O}n (1GdFe), {[Dy(L)(H2O)2Fe(CN)6]·3H2O}n (2DyFe), and {[Dy(L)(H2O)2Co(CN)6]·H2O}n (3DyCo), were assembled following the building-block approach (L = pentadentate bis-semicarbazone ligand resulting from the condensation reaction between 2,6-diacetyl-pyridine and semicarbazide). The crystal structures consist of crenel-like LnIII-MIII alternate chains, with the LnIII ions connected by the hexacyanido metalloligands through two cis cyanido groups. The magnetic properties of the three complexes have been investigated. Field-induced slow relaxation of the magnetization was observed for compounds 2DyFe and 3DyCo. Compound 3DyCo is a new example of chain of Single Ion Magnets.

Preparation, Crystal Structures, and Magnetic Features for a Series of Dinuclear [NiIILnIII] Schiff-Base Complexes: Evidence for Slow Relaxation of the Magnetization for the DyIIIDerivative

2011 ◽  
Vol 50 (13) ◽  
pp. 5890-5898 ◽  
Author(s):  
Traian D. Pasatoiu ◽  
Jean-Pascal Sutter ◽  
Augustin M. Madalan ◽  
Fatima Zohra Chiboub Fellah ◽  
Carine Duhayon ◽  
...  
Keyword(s):  
Schiff Base ◽  
Crystal Structures ◽  
Slow Relaxation ◽  
Schiff Base Complexes ◽  
Magnetic Features

Synthesis, structures and magnetic properties of dysprosium(III) complexes based on amino-bis(benzotriazole phenolate) and nitrophenolates: influence over the slow relaxation of the magnetization.

CrystEngComm ◽  
2021 ◽  
Author(s):  
Bo-Yi Chen ◽  
Mim-Yem Tsai ◽  
Yu-Chia Su ◽  
Po-Heng Lin ◽  
Jérôme Long
Keyword(s):  
Magnetic Properties ◽  
Crystal Structures ◽  
Slow Relaxation ◽  
Pentagonal Bipyramid

We report the synthesis and crystal structures of four dysprosium(III) complexes based on the amino-bis(benzotriazole phenolate) ligand (C1NNBiBTP-H2). Whereas a pentagonal bipyramid complex [Dy(C1NNBiBTP-H)Cl2DMF]•THF (1•THF) is obtained in the absence...

scholarly journals Impact of Iron on the Fe–Co–Ni Ternary Nanocomposites Structural and Magnetic Features Obtained via Chemical Precipitation Followed by Reduction Process for Various Magnetically Coupled Devices Applications

Nanomaterials ◽  
2021 ◽  
Vol 11 (2) ◽  
pp. 341
Author(s):  
Tien Hiep Nguyen ◽  
Gopalu Karunakaran ◽  
Yu.V. Konyukhov ◽  
Nguyen Van Minh ◽  
D.Yu. Karpenkov ◽  
...  
Keyword(s):  
Particle Size ◽  
Magnetic Properties ◽  
Reduction Process ◽  
Chemical Precipitation ◽  
Precipitation Method ◽  
Magnetic Characteristics ◽  
Reduction Temperature ◽  
Fe Content ◽  
Magnetic Features ◽  
Co Precipitation

This paper presents the synthesis of Fe–Co–Ni nanocomposites by chemical precipitation, followed by a reduction process. It was found that the influence of the chemical composition and reduction temperature greatly alters the phase formation, its structures, particle size distribution, and magnetic properties of Fe–Co–Ni nanocomposites. The initial hydroxides of Fe–Co–Ni combinations were prepared by the co-precipitation method from nitrate precursors and precipitated using alkali. The reduction process was carried out by hydrogen in the temperature range of 300–500 °C under isothermal conditions. The nanocomposites had metallic and intermetallic phases with different lattice parameter values due to the increase in Fe content. In this paper, we showed that the values of the magnetic parameters of nanocomposites can be controlled in the ranges of MS = 7.6–192.5 Am2/kg, Mr = 0.4–39.7 Am2/kg, Mr/Ms = 0.02–0.32, and HcM = 4.72–60.68 kA/m by regulating the composition and reduction temperature of the Fe–Co–Ni composites. Due to the reduction process, drastic variations in the magnetic features result from the intermetallic and metallic face formation. The variation in magnetic characteristics is guided by the reduction degree, particle size growth, and crystallinity enhancement. Moreover, the reduction of the surface spins fraction of the nanocomposites under their growth induced an increase in the saturation magnetization. This is the first report where the influence of Fe content on the Fe–Co–Ni ternary system phase content and magnetic properties was evaluated. The Fe–Co–Ni ternary nanocomposites obtained by co-precipitation, followed by the hydrogen reduction led to the formation of better magnetic materials for various magnetically coupled device applications.

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