Cross-linking of cyanide magnetic coordination polymers by rational insertion of formate, cyanide or azide

2018 ◽  
Vol 47 (34) ◽  
pp. 11888-11894 ◽  
Author(s):  
Gabriela Handzlik ◽  
Barbara Sieklucka ◽  
Dawid Pinkowicz
Keyword(s):  
Magnetic Properties ◽  
Coordination Polymers ◽  
Magnetic Ordering ◽  
Magnetic Interactions ◽  
Cross Linking ◽  
Bridging Ligands ◽  
Cross Links ◽  
Coordination Framework ◽  
Magnetic Ordering Temperature

Anionic bridging ligands formate, cyanide and azide have been used to form cross-links in a ferrimagnetic coordination framework, resulting in competing magnetic interactions that decrease the magnetic ordering temperature and result in peculiar magnetic properties.

Magnetic Studies of Layered Cathode Materials for Lithium Ion Batteries

2006 ◽  
Vol 972 ◽  
Author(s):  
Natasha A. Chernova ◽  
Miaomiao Ma ◽  
Jie Xiao ◽  
M. Stanley Whittingham ◽  
Jordi Cabana Jiménez ◽  
...  
Keyword(s):  
Magnetic Properties ◽  
Ion Exchange ◽  
Cathode Materials ◽  
Ac Susceptibility ◽  
Exchange Process ◽  
Lithium Ion ◽  
Magnetic Ordering ◽  
Magnetic Interactions ◽  
Magnetic Studies ◽  
Ion Exchange Process

AbstractThe magnetic properties of layered LiNi0.5Mn0.5O2 and NaNi0.5Mn0.5O2 cathode materials are studied using AC susceptibility and DC magnetization techniques in order to elucidate magnetic interactions within transition metal (TM) layers and between them in samples with various TM distributions. In NaNi0.5Mn0.5O2 antiferromagnetic (AF) ordering transition is found at 60 K and a spin-flop transition at high magnetic field. In LiNi0.5Mn0.5O2 obtained by ion exchange from NaNi0.5Mn0.5O2 ferrimagnetic ordering is found at around 100 K. The saturation magnetization and the hysteresis loop size of ion-exchanged compounds vary from sample to sample, which implies that the Ni2+ ions migrate upon ion exchange process. Magnetic properties of high-temperature and ion-exchanged LiNi0.5Mn0.5O2 are compared; magnetic ordering models for all compounds are proposed based on experimental results and Goodenough-Kanamori rules.

Investigation of field-controlled magnetocaloric switching and magnetodielectric phenomena in spin-chain compound Er2BaNiO5

2021 ◽  
Author(s):  
Arnab Pal ◽  
Zhenjie Feng ◽  
Hao Wu ◽  
Ke Wang ◽  
Jingying Si ◽  
...  
Keyword(s):  
Magnetic Field ◽  
Spin Chain ◽  
Magnetic Ordering ◽  
Magnetic Interactions ◽  
Future Research ◽  
Antiferromagnetic Ordering ◽  
Magnetocaloric Properties ◽  
Magnetic Ordering Temperature ◽  
Magnetodielectric Effect ◽  
Chain Compound

Abstract The Haldane spin-chain compound Er2BaNiO5 has been known to possess magnetoelectric coupling below the magnetic ordering temperature. Here we report various low-temperature magnetic and magnetocaloric properties, and magnetodielectric effect above magnetic ordering temperature in this compound. The present compound displays a coexistence of conventional and inverse magnetocaloric effects with a large entropy change of 5.9 and −2.5 J/kg K, respectively. Further, it exhibits a remarkable switching between them, which can be tuned with temperature and magnetic field. In addition, evolution of two magnetic field-dependent metamagnetic transitions at 19.7 and 27.7 kOe, and their correlation with magnetocaloric switching effect, make this compound effective for potential applications. On the other hand, demonstration of intrinsic magnetodielectric effect (1.9%) near and above antiferromagnetic ordering temperature, through a moderate coupling between electric dipoles and magnetic spins, establishes this compound as a useful candidate for future research. A detailed analysis of these findings, in a framework of different magnetic interactions and magnetocrystalline anisotropies, is discussed here. Overall, these results may provide a future pathway to tune the magnetic, magnetodielectric, and magnetocaloric properties in this compound toward better application potential.

Computer Calculations of the Thermally-Induced Magnetic and Electronic Properties of the Rare Earth Compounds RERu2Si2

2005 ◽  
Vol 480-481 ◽  
pp. 617-622
Author(s):  
Rafal Michalski ◽  
Ryszard J. Radwanski
Keyword(s):  
Magnetic Properties ◽  
Rare Earth ◽  
Electronic Properties ◽  
Zeeman Effect ◽  
Magnetic Ordering ◽  
Anisotropy Field ◽  
Magnetic Interactions ◽  
Rare Earth Compounds ◽  
Paramagnetic Region ◽  
The Rare Earth

The aim of this paper is to demonstrate the effectiveness of the calculation method, which takes into consideration the electrostatic ligands field as well as the the magnetic interactions. Our calculations method based on crystal field (CEF) together with the Zeeman effect in one Hamiltonian and allows calculating many of the temperature dependencies of the magnetic and electronic properties of the rare earth compounds. The result of the calculations shows the accuracy of the approach even for the intermetallic compounds. The obtained results for calculations of the compounds of the family in RERu2Si2 (RE – rare-earth element) are fully confirmed the experimental data such as: the easy magnetic direction of all the analyzed compounds, the thermal dependencies of magnetic properties; in particular the giant magnetocrystalline anisotropy of PrRu2S2 with the calculated anisotropy field BA>400T, in-plain anisotropy of ErRu2Si2, the cause of difficulty in magnetic ordering of compounds TmRu2Si2 and YbRu2Si2 as well as effects and dependencies not foreseen before. In this paper we have put together the elementary calculated magnetic properties for the chosen compounds of RERu2Si2 in the paramagnetic region. All Calculations are on the basis of the calculating computer package BIREC 1.51.

Synthesis and magnetic properties of two Mn-based coordination polymers constructed by a mixed-ligand strategy

CrystEngComm ◽  
2020 ◽  
Vol 22 (42) ◽  
pp. 7123-7128
Author(s):  
Yujuan Zhang ◽  
Lingling Gao ◽  
Wendi Zhou ◽  
Xiaoqin Wei ◽  
Tuoping Hu
Keyword(s):  
Magnetic Properties ◽  
Magnetic Structure ◽  
Coordination Polymers ◽  
Mixed Ligand ◽  
Magnetic Interactions ◽  
Structure Effect ◽  
Effect Relationship

Two Mn(ii) CPs have been synthesized by mixed-ligand strategy and measured for their magnetic properties. Moreover, analysis of the magnetic structure–effect relationship indicates that 1 and 2 have different Mn chains of magnetic interactions.

scholarly journals Two Dimensional Magnetic Coordination Polymers Formed by Lanthanoids and Chlorocyananilato

2018 ◽  
Vol 4 (4) ◽  
pp. 58 ◽  
Author(s):  
Samia Benmansour ◽  
Antonio Hernández-Paredes ◽  
Carlos Gómez-García
Keyword(s):  
Magnetic Properties ◽  
Coordination Polymers ◽  
Magnetic Coupling ◽  
Magnetic Interactions ◽  
Two Dimensional ◽  
Shape Distortion ◽  
Structural Differences ◽  
Internal Character

Here we show the important role played by the size of the lanthanoid and the solvent used in the final structures of several two-dimensional magnetic coordination polymers with the ligand chlorocyananilato, (C6O4(CN)Cl)2−. With this aim we have prepared five compounds: [Nd2(C6O4(CN)Cl)3(DMF)6] (1) (DMF = dimethylformamide), [Dy2(C6O4(CN)Cl)3(DMF)6]·4H2O (2), [Ho2(C6O4(CN)Cl)3(DMF)6]·2H2O (3), and [Ln2(C6O4(CN)Cl)3(DMSO)6] with Ln = Ce (4) and Nd (5) (DMSO = dimethylsulfoxide). These compounds are formed by two dimensional networks with a (6,3)-topology but, depending on the size of the lanthanoid and on the solvent used, show important structural differences, including the size, shape, distortion and content of the cavities as well as the flatness of the layers. The comparison of compounds 1–3 and 4–5 shows the role played by the size of the lanthanoid while keeping constant the solvent, whereas, the comparison of compounds 1 and 5 shows the role of the solvent (DMF vs. DMSO) while keeping constant the lanthanoid. The magnetic properties of all of them show the absence of noticeable magnetic interactions, in agreement with previous results that can be explained by the internal character of the 4f electron and the weak magnetic coupling mediated by these anilato-based ligands.

The Influence of Diamagnetic Substrates Absorption on Magnetic Properties of Porous Coordination Polymers

2013 ◽  
Vol 3 (2) ◽  
pp. 144-160 ◽  
Author(s):  
Sergey Kolotilov ◽  
Mikhail Kiskin ◽  
Igor Eremenko ◽  
Vladimir Novotortsev
Keyword(s):  
Magnetic Properties ◽  
Coordination Polymers ◽  
Porous Coordination Polymers

Molecular structures and magnetic properties of .mu.-phenolato binuclear copper(II) complexes incorporating chloro, hydroxo, and azido exogenous bridging ligands

1988 ◽  
Vol 27 (21) ◽  
pp. 3710-3716 ◽  
Author(s):  
Azdine Benzekri ◽  
Patrick Dubourdeaux ◽  
Jean Marc Latour ◽  
Jean Laugier ◽  
Paul Rey
Keyword(s):  
Magnetic Properties ◽  
Molecular Structures ◽  
Binuclear Copper ◽  
Bridging Ligands
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