Mössbauer and Magnetic Property Study on Cyano-Bridged Complex [Gu(en)x]yMA[Fe(CN)6]z·nH2O(MA=K+)

2012 ◽  
Vol 567 ◽  
pp. 21-24 ◽  
Author(s):  
Zhong Hui Ye ◽  
Qing Lin ◽  
Hai Fu Huang ◽  
Yun He ◽  
Shao Hong Chen
Keyword(s):  
Magnetic Properties ◽  
Magnetic Susceptibility ◽  
Magnetic Property ◽  
Long Range ◽  
Ground State ◽  
Antiferromagnetic Interaction ◽  
Ferromagnetic Coupling ◽  
Curie Constant ◽  
Ferromagnetic Interaction ◽  
Weiss Constant

The cyano-bridged complexe [Gu(en)x]yMA[Fe(CN)6]z·nH2O(MA=K+) have been synthesized. In the compound [Cu(en)2][KFe(CN)6]·H2O, we shows firstly a weak intramolecular anti-ferromagnetic coupling between Fe3+(ground state 5T2g, S=1/2) and Cu2+(ground state 6T2g3eg, S=1/2) through the long- range cyano bridges. The magnetic susceptibility obey the curie-weiss law [χ=C/(T-θ)] with a negative weiss constant,the curie constant C=0.42cm3·k·mol-1, the compound exists a strong Cu2+–CN–Fe3+ ferromagnetic interaction and a weak Cu2+(ground state 6T2g3eg, S=1/2)–Cu2+(ground state 6T2g3eg, S=1/2) antiferromagnetic interaction, through long range of NC-Fe-CN. At the same time, we have given an explanation from magnetic properties and struction of compounds.

WANG–LANDAU SIMULATION ON THERMODYNAMIC AND MAGNETIC PROPERTIES OF HONEYCOMB LATTICE

2011 ◽  
Vol 25 (26) ◽  
pp. 3435-3442
Author(s):  
XIAOYAN YAO
Keyword(s):  
Magnetic Field ◽  
Monte Carlo Simulation ◽  
Magnetic Properties ◽  
Free Energy ◽  
Magnetic Susceptibility ◽  
Magnetic Property ◽  
Ground State ◽  
Antiferromagnetic Order ◽  
Honeycomb Lattice ◽  
Antiferromagnetic Ising Model

Wang–Landau algorithm of Monte Carlo simulation is performed to understand the thermodynamic and magnetic properties of antiferromagnetic Ising model on honeycomb lattice. The internal energy, specific heat, free energy and entropy are calculated to present the thermodynamic behavior. For magnetic property, the magnetization and magnetic susceptibility are discussed at different temperature upon different magnetic field. The antiferromagnetic order is confirmed to be the ground state of the system, and it can be destroyed by a large magnetic field.

scholarly journals Novel Structures and Magnetic Properties of Two [Mn2] Complexes with 2,4-di-2-pyridyl-2,4-pentanediol as the Ligand

2019 ◽  
Vol 5 (3) ◽  
pp. 43
Author(s):  
En-Che Yang ◽  
Yu-Ying Chang ◽  
Shi-Yi Huang ◽  
Ling-Xuan Hong ◽  
Gene-Hsiang Lee ◽  
...  
Keyword(s):  
Magnetic Properties ◽  
Magnetic Property ◽  
The Other ◽  
Antiferromagnetic Coupling ◽  
Monoclinic Space Group ◽  
Ferromagnetic Coupling ◽  
Manganese Ions ◽  
Space Group ◽  
Metal Metal ◽  
Novel Structures

Two ligands, 2,4-di-2-pyridyl-2,4-pentanediol (rD and mD), were employed to synthesize two Mn2 complexes, [Mn2(rD)2Br2] (1) and [Mn2(mD)2(H2O)2]Br2 (2). Compound 1 crystallized in a tetragonal space group, P41212, with a novel hamburger shaped structure. A detailed study indicated that compound 1 did not contain a metal–metal bond, but antiferromagnetic coupling was observed between the Mn(III) ions. Compound 2 crystallized in a monoclinic space group, C2/c, with one Mn(II) and the other with Mn(IV). The two manganese ions were bridged by two alkoxide ligands, resulting in ferromagnetic coupling. Magnetic property studies confirm the above assignments.

Magnetic properties and structure of some copper(II) complexes of pyridine and quinoline N-oxides

1967 ◽  
Vol 20 (11) ◽  
pp. 2403 ◽  
Author(s):  
SJ Gruber ◽  
CM Harris ◽  
E Kokot ◽  
SL Lenzer ◽  
TN Lockyer ◽  
...  
Keyword(s):  
Magnetic Properties ◽  
Magnetic Susceptibility ◽  
Magnetic Moments ◽  
Paramagnetic Complex ◽  
Water Molecules ◽  
Acetate Monohydrate ◽  
Binuclear Copper ◽  
Kcal Mole ◽  
Ferromagnetic Interaction ◽  
Magnetic Susceptibilities

The magnetism of various copper(II) complexes of pyridine and quinoline N-oxides1 has been further investigated. The compounds Cu(C5H5NO)nX2 (where n = 4 or 6, X = ClO4; n = 2, X = Cl, Br, NCS; n = 1, X = Cl, Br, CH3COO) and Cu(C9H7NO)nX2 where n = 4, X = ClO4; n = 2, X = Cl, Br, NO3; n = 1, X = Cl, Br, CH3COO) have been studied. The variation of the magnetic susceptibilities of most of these compounds is reported over a temperature range. The variation of the magnetic susceptibility with temperature for the weakly paramagnetic complex Cu(C5H5NO)Cl2 is discussed in terms of the binuclear oxygen-bridged structure previously postulated.1 The compound exhibits anti-ferromagnetic interaction between pairs of copper(II) atoms with a singlet-triplet separation of 2.1 kcal/mole. The compounds Cu(C5H5NO)2Cl2, Cu(C5H5NO)Br2, and Cu(C9H7NO)X2 (X = Cl, Br) are more weakly paramagnetic due to a larger singlet-triplet separation. The compound Cu(C5H5NO)2Br2 possesses a higher paramagnetic susceptibility than those of the previous compounds, and its magnetic properties are consistent with a dimeric structure involving a singlet- triplet separation of 0.7 kcal/mole. The copper(II) acetate adducts, Cu(CH3COO)2,L (L = C5H5NO or C9H7NO), possess very similar magnetic properties to binuclear copper(II) acetate monohydrate and presumably possess a similar structure, with the N-oxides replacing the water molecules. These compounds exhibit singlet-triplet energies of c. 1 kcal/mole similar to values reported for a large number of copper(II) alkanoates. The compounds Cu(C5H5NO)2(NCS)2, Cu(C5H5NO)4(ClO4)2, Cu(C5H5NO)6- (ClO4)2, Cu(C9H7NO)2X2 (X = Cl, Br, NO3), all obey the Curie-Weiss law and possess mean magnetic moments of 1.89, 1.80, 1.93, 1.88, 1.96, and 1.88 B.M. (corrected for θ values of -12, -7, -8, + -4, and -16�) respectively.

scholarly journals An Uneven Chain-like Ferromagnetic Copper(II) Coordination Polymer Displaying Metamagnetic Behavior and Long-Range Magnetic Ordering

2021 ◽  
Vol 8 (1) ◽  
pp. 2
Author(s):  
Cai-Ming Liu ◽  
You Song
Keyword(s):  
Molecular Structure ◽  
Coordination Polymer ◽  
Hydrogen Bonds ◽  
Long Range ◽  
Three Dimensional ◽  
Magnetic Ordering ◽  
Antiferromagnetic Interaction ◽  
Ferromagnetic Coupling ◽  
One Dimensional ◽  
1D Chain

Ferromagnetic coupling exists in an uneven chain-like copper(II) complex with both end-on azido and syn-syn carboxylato bridges, (Cu3(L)2(N3)4(H2O)3)n (1, HL = 6-hydroxynicotinic acid). It is the first example of one-dimensional (1D) chain-like copper(II) coordination polymer showing both metamagnetic behavior and long-range magnetic ordering (Tc = 6.7 K), thanks to the interchain hydrogen bonds, which make a three-dimensional (3D) supramolecular array of the entire molecular structure and mediate the interchain antiferromagnetic interaction.

Five new coordination polymers with a Y-shaped N-heterocyclic carboxylic acid: structural diversity, bifunctional luminescence sensing and magnetic properties

CrystEngComm ◽  
2019 ◽  
Vol 21 (38) ◽  
pp. 5767-5778 ◽  
Author(s):  
Jinxia Liang ◽  
Jie Zhang ◽  
Jinfang Liang ◽  
Lijun Zhai ◽  
Haonan Wu ◽  
...  
Keyword(s):  
Magnetic Properties ◽  
Carboxylic Acid ◽  
Coordination Polymers ◽  
Structural Diversity ◽  
Antiferromagnetic Interaction ◽  
Ferromagnetic Interaction ◽  
Solvothermal Conditions

Five novel CPs have been synthesized under solvothermal conditions. The results show that 1 and 2 present high sensing ability for NACs and Fe3+ ions, and there exist ferromagnetic interaction in 3/4 and antiferromagnetic interaction in 5.

Thermal and magnetic properties of ferric methylammonium sulphate

1956 ◽  
Vol 237 (1210) ◽  
pp. 404-412 ◽  
Keyword(s):  
Magnetic Properties ◽  
Magnetic Susceptibility ◽  
Specific Heat ◽  
Magnetic Anomaly ◽  
Ground State ◽  
Magnetic Contribution ◽  
Lattice Contribution ◽  
Magnetic Cooling ◽  
Maximum Value ◽  
Other Substances

The specific heat and magnetic susceptibility of ferric methylammonium sulphate have been measured at temperatures between 0·17 and 20°K. The specific heat has been analyzed into a lattice contribution and a magnetic anomaly. It is shown that the magnetic contribution to the specific heat can be accounted for almost entirely by the Schottky anomaly due to the Stark splittings of the ground state of the Fe 3+ ions, previously determined by Bleaney & Trenam. These splittings are unusually large in this salt, with the result that the specific heat is very large at temperatures near 1°K, reaching a maximum value of 1·1 cal/mole at 0·33°K. The salt should therefore be useful for magnetic cooling experiments in which other substances are to be kept below 1°K for prolonged periods.

Magnetic Anisotropy of Cerium Endohedral Metallofullerene

2001 ◽  
Vol 706 ◽  
Author(s):  
Masayasu Inakuma ◽  
Toshiaki Enoki ◽  
Haruhito Kato ◽  
Hisanori Shinohara
Keyword(s):  
Magnetic Properties ◽  
Magnetic Susceptibility ◽  
Low Temperature ◽  
Magnetic Anisotropy ◽  
Rotational Motion ◽  
Applied Field ◽  
Magnetic Interaction ◽  
Magnetization Measurement ◽  
Antiferromagnetic Interaction ◽  
Antiferromagnetic Coupling

AbstractThe magnetic properties of Ce@C82 have been studied. The magnetic anisotropy of Ce@C82 was analyzed taking account of the crystal field of the interior C82 cage acting on Ce3+ ion. Results showed that the reduction of the susceptibility at low temperature was caused due to the antiferromagnetic coupling between Ce3+ ion and C82 cage. The magnetization measurement at several temperatures also supported the antiferromagnetic interaction at low temperature. The magnetic susceptibility larger than the calculated one was measured at higher temperatures due to the magnetic interaction between the metallofullerenes and between the particles in the crystal. The magnetization of some frozen Ce@C82 solutions was found to depend on the applied field magnitude. The dependence suggested that the magnetic anisotropy of Ce ion induced a torque to restrict the rotational motion of Ce@C82 by the field.

Possible ferromagnetism of dense quark matter

2018 ◽  
Vol 96 (11) ◽  
pp. 1163-1172
Author(s):  
Kausik Pal
Keyword(s):  
Phase Transition ◽  
Magnetic Properties ◽  
Magnetic Susceptibility ◽  
Single Particle ◽  
Ground State ◽  
Quark Matter ◽  
State Energy ◽  
Magnetic Instability ◽  
Dense Quark Matter ◽  
Spin Polarized

The cardinal focus of the present review is to investigate the possibility of the para-ferro phase transition of dense quark matter. For these, the calculation of the single-particle energies, ground state energy (GSE) densities, and spin susceptibility χ of degenerate quark matter with one gluon exchange interaction in terms of spin-dependent Landau parameters (LPs) have been presented. The expressions for the GSE and χ of cold and dense spin-polarized quark matter have been derived with corrections due to correlation. Furthermore, the magnetic properties of spin polarized quark matter have been discussed by evaluating the magnetization ⟨M⟩ and magnetic susceptibility χM in terms of LPs. Finally, the possibility of magnetic instability has been revealed by studying the density dependence of ⟨M⟩ and χM.

scholarly journals Synthesis, Crystal Structure, and Spectral and Magnetic Properties of Chloro-Bridged Chain Complex of Dinuclear Ruthenium(II,III) 3,4,5-Triethoxybenzoate

2009 ◽  
Vol 4 (1) ◽  
pp. 90-96
Author(s):  
Hideaki Ishida ◽  
Makoto Handa ◽  
Ichiro Hiromitsu ◽  
Masahiro Mikuriya
Keyword(s):  
Crystal Structure ◽  
Magnetic Properties ◽  
Magnetic Susceptibility ◽  
Broad Band ◽  
Chain Complex ◽  
Chain Structure ◽  
Antiferromagnetic Interaction ◽  
X Ray ◽  
Dinuclear Ruthenium ◽  
Complex Forms

A chloro-bridged chain complex constructed from paddlewheel-type dinuclear ruthenium(II,III) carboxylate units, [Ru2{3,4,5-(C2H5O)3C6H2CO2}4Cl]n·1.2nC2H5OH (1·1.2nC2H5OH), was synthesized and characterized by elemental analysis and IR and UV-vis spectroscopies. The single-crystal X-ray analysis showed that the complex forms a zig-zag chain structure, in which the chloroligands bridge the dinuclear units at the axial positions with the Ru1–Cl–Ru2 angle of 120.38(7)°. A broad band around 1144 nm and a band at 475 nm were observed in the diffused reflectance spectra and ascribed to a δ→δ* and a π(RuO, Ru2)→π*(Ru2) transitions, respectively. Temperature dependence of magnetic susceptibility showed that the antiferromagnetic interaction between the dinuclear units is weak (zJ = −0.8 cm−1) with D value of 60 cm−1.

Magnetic Properties of Cobalt and Manganese Oxide Spinel Ceramics

2010 ◽  
Vol 67 ◽  
pp. 143-148 ◽  
Author(s):  
Sophie Guillemet-Fritsch ◽  
Christophe Tenailleau ◽  
Helene Bordeneuve ◽  
Abel Rousset
Keyword(s):  
Magnetic Properties ◽  
Magnetic Susceptibility ◽  
Low Temperature ◽  
Neutron Diffraction ◽  
Manganese Oxide ◽  
Magnetic Moments ◽  
Curie Constant ◽  
Octahedral Sites ◽  
Sample Composition ◽  
Oxide Spinel

Magnetic susceptibility measurements, magnetization and neutron diffraction results at low temperature for cobalt and manganese oxide spinel ceramics are presented. The Curie temperature varies similarly with the sample composition in ceramics and powders. The experimental molar Curie constant variation is explained by the presence of Co2+, CoIII, Mn3+ and Mn4+, and possibly Co3+ in the octahedral sites for the cobalt rich phases. The magnetic moments of the cations in tetrahedral and octahedral sites are not collinear and the global magnetization is oriented in a third direction.

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