Magnetische Eigenschaften von [Cu{OCH2CH2N(C4H9)2}NCO]4 im Bereich von 10 bis 240 K / Magnetic Properties of [Cu{OCH2CH2N(C4H9)2}NCO]4 in the Temperature Range from 10 to 240 K

1998 ◽  
Vol 53 (1) ◽  
pp. 58-62
Author(s):  
W. Münch ◽  
L. Walz ◽  
M. König
Keyword(s):  
Magnetic Properties ◽  
Magnetic Susceptibility ◽  
Temperature Dependence ◽  
Title Compound ◽  
Temperature Range ◽  
New Phase ◽  
Exchange Parameters

The magnetic properties of the title compound were re-investigated, since a new phase below 240 K has recently been identified. The exchange parameters were evaluated from the temperature dependence of the magnetic susceptibility with a Heisenberg operator taking into account the high pseudo-symmetry of the tetrameric units observed.

Magnetic properties of rare earth chromium borates at high temperatures

2021 ◽  
pp. 166-170
Author(s):  
O.K. Kuvandikov ◽  
◽  
N.I. Leonyuk ◽  
V.V. Malsev ◽  
M.M. Kuzmin ◽  
...  
Keyword(s):  
Magnetic Properties ◽  
Magnetic Susceptibility ◽  
Rare Earth ◽  
Temperature Dependence ◽  
High Temperatures ◽  
Wide Temperature Range ◽  
Magnetic Moments ◽  
Chemical Formula ◽  
Temperature Range ◽  
Curie Temperatures

Temperature dependence of the magnetic susceptibility has been studied for rare-earth borates NdCr3(BO3)4, SmCr3(BO3)4 and LuCr3(BO3)4 by the Faradey method in the wide temperature range (300-1200 K). The dependence for each phase follows the Curi - Weis law. The Curie temperatures, Neel temperatures and magnetic moments corresponding to the chemical formula of the crystals, have been found.

scholarly journals Preparation of ε-Fe(Si)3N Powder Using a Salt Bath Nitriding Reaction and a Study on the Soft Magnetic Properties of the Powder

Materials ◽  
2019 ◽  
Vol 12 (2) ◽  
pp. 228
Author(s):  
Yuhua Xu ◽  
Zhenghou Zhu ◽  
Hui Zhao ◽  
Jia Zhou
Keyword(s):  
Magnetic Properties ◽  
Temperature Dependence ◽  
Saturation Magnetization ◽  
Salt Bath ◽  
Soft Magnetic Properties ◽  
Soft Magnetic ◽  
Temperature Range ◽  
Nitriding Reaction ◽  
Salt Bath Nitriding ◽  
Fesi Alloy

In this paper, a single phase ε-Fe(Si)3N powder was successfully synthesized through the salt bath nitriding reaction method. The flaky FeSi alloy powder was used as the iron source, and non-toxic CO(NH2)2 was used as the nitrogen source. The nitridation mechanism, the preparation technology, the soft magnetic properties, and the magnetization temperature dependence of the powder were studied. The research result showed that ε-Fe(Si)3N alloy powders were synthesized in a high temperature nitrification system after the surface of flaky FeSi alloy powders were activated by a high-energy ball mill. The optimum nitriding process was nitridation for 1 h at 550 °C. The ε-Fe(Si)3N powder had good thermal stability at less than 478.8 °C. It was shown that ε-Fe(Si)3N powder has good soft magnetic properties, and the saturation magnetization of the powder was up to 139 emu/g. The saturation magnetization of ε-Fe(Si)3N powder remains basically constant in the temperature range of 300–400 K. In the temperature range of 400–600 K, the saturation magnetization decreases slightly with the increase of temperature, indicating that the magnetic ε-Fe(Si)3N powder has good magnetization temperature dependence.

Basic halides and related species of molybdenum(III). II. Spectroscopic and magnetic properties of MoOF(H2O)3 and MoOCl(H2O)3

1976 ◽  
Vol 29 (4) ◽  
pp. 717 ◽  
Author(s):  
DJ Stabb
Keyword(s):  
Magnetic Properties ◽  
Magnetic Susceptibility ◽  
Absorption Spectroscopy ◽  
Infrared Spectra ◽  
Electronic Spectra ◽  
Related Species ◽  
Bound Water ◽  
Temperature Range ◽  
Field Dependent

Two basic halides of molybdenum(111), namely MoOF(H2O)3 and MoOCl(H2O)3 (some samples containing additional loosely bound water), were investigated by absorption spectroscopy in the range 200-50000 cm-1, and by magnetic susceptibility measurements over a temperature range of 100-300 K. Infrared spectra showed bands at about 670 and 1600 cm-l, but not in the range 800-1100 cm-1. Electronic spectra showed poorly defined bands superimposed on strong general absorption. Very weak paramagnetism was observed: this was field dependent. The results are interpreted to show the compounds to be oxygen-bridged polymers [MOX(H2O)3O]n, rather than species containing Mo=O or Mo-0-H groups.

Synthesis and Properties of Ionogels Based on 1-vinyl-3-alkylimidazolium Tetrahalogenidoferrate (III) [VAIM][FeClnBr4-n] and PMMA

2013 ◽  
Vol 702 ◽  
pp. 74-78 ◽  
Author(s):  
Yi Mei Tang ◽  
Xiao Ling Hu ◽  
Li Wei Qian ◽  
Ping Guan
Keyword(s):  
Mechanical Properties ◽  
Thermal Stability ◽  
Magnetic Properties ◽  
Ionic Liquid ◽  
Magnetic Susceptibility ◽  
Alkyl Chain ◽  
Imidazole Ring ◽  
The Self ◽  
Weiss Temperature ◽  
Temperature Range

The paramagnetic ionic liquid (IL) 1-vinyl-3-alkylimidazolium tetrahalogenidoferrate (Ⅲ) [VAIM][FeClnBr4-n] (A= n-butyl, n-pentyl, n-hexyl; n=3,4 or 2, 3,4.) has been used in the synthesis of paramagnetic [VAIM][FeClnBr4-n]/PMMA ionogels. The thermal stability for the ionogels increases significantly compared with [VAIM][FeClnBr4-n] and PMMA. Magnetic susceptibility measurements were carried out in the temperature range 1.8 K–300 K. The Curie–Weiss temperature is -0.989 K, -0.669 K and -0.169 K, respectively as the alkyl chain to 3 position of imidazole ring elongate. The magnetic properties are similar to those reported for the pure IL and the self-made [VAIM][FeClnBr4-n] and are not influenced by the incorporation of paramagnetic [VAIM][FeClnBr4-n] into the PMMA matrix. The magnetic ionogel is thus an interesting material combining the mechanical properties of the polyer with the functionality of the magnetic IL, such as magnetism.

Magnetic properties of some copper(II) complexes of benzimidazolylalkanols

1973 ◽  
Vol 26 (5) ◽  
pp. 997 ◽  
Author(s):  
GJ Hamilton ◽  
E Kokot
Keyword(s):  
Magnetic Properties ◽  
Magnetic Susceptibility ◽  
General Formula ◽  
Magnetic Behaviour ◽  
Methyl Group ◽  
Temperature Range

The magnetic susceptibility in the temperature range 80-400 K is reported for copper(II) complexes of the general formula CuLX, where L is benzimidazole substituted in the 2-position by α- or β-hydroxyalkyl groups and in some cases also in the N-position by a methyl group and X is Br-, Cl-, or acetate. The magnetic behaviour of 1-(benzimidazol-2- yl)alkanolato complexes is interpreted in terms of antiferro- magnetically exchange-coupled pairs of copper atoms. The 2- (benzimidazol-2-yl)-alkanolato complex is a linear antiferromagnet.

scholarly journals Temperature Dependence of Electronic and Magnetic Properties of (DOEO)4[HgBr4]·TCE Single Crystals

2015 ◽  
Vol 233-234 ◽  
pp. 173-176
Author(s):  
Alisa Chernenkaya ◽  
Oksana Koplak ◽  
Katerina Medjanik ◽  
Aleksandr Kotov ◽  
Roman Morgunov ◽  
...  
Keyword(s):  
Magnetic Properties ◽  
Magnetic Susceptibility ◽  
Temperature Dependence ◽  
Ground State ◽  
Carrier Density ◽  
Charge Carrier Density ◽  
Pronounced Increase ◽  
Electronic And Magnetic Properties ◽  
Increasing Temperature ◽  
Semiconducting Behavior

The temperature dependence of electronic and magnetic properties of the organic charge-transfer salt (DOEO)4[HgBr4]·TCE was investigated using magnetometry. The magnetic susceptibility shows a maximum at 40 K followed by an onset of a pronounced increase at 70 K and a constant behavior above 120 K. Implications on the charge carrier density are discussed. Combining the magnetometry with resistivity and ESR measurements we propose a sequence of insulating, metallic and semiconducting behavior with increasing temperature. Our results indicate that (DOEO)4[HgBr4]·TCE is close to the boundary between an insulating and conducting ground state.

scholarly journals Magnetic susceptibility and related properties of rare-earth crystals

1939 ◽  
Vol 170 (940) ◽  
pp. 112-129 ◽  
Keyword(s):  
Magnetic Properties ◽  
Magnetic Susceptibility ◽  
Rare Earth ◽  
Specific Heat ◽  
Absorption Spectra ◽  
Room Temperature ◽  
Magnetic Susceptibilities ◽  
Temperature Range ◽  
The Mean

This paper has arisen from attempts to correlate the results of experiments on magnetic susceptibilities, specific heat and absorption spectra of rareearth crystals. No theory has yet been advanced which is capable of giving simultaneous quantitative numerical agreement on all these properties, nor indeed does it seem possible to develop such a theory. For reasons which we shall explain, it seems more likely that some of the data are wrong, or at least, that they have been wrongly interpreted. Many measurements have been made of the magnetic properties of hydrated rare-earth crystals. Accurate values of the mean molecular susceptibility, X , have been obtained over a temperature range from a few degrees absolute to room temperature, and the anisotropy of the susceptibility at room temperature has also been measured

scholarly journals On the Magnetic behaviour of Tetrakis[2-Diethylamino- Ethanolato-μ3-O-Copper(II)-Isocyanate] · Trichloromethane, C28H56CU4N8O8 · CHCl3,a Tetrameric Copper(II) Complex with Antiferromagnetic Ground State

1985 ◽  
Vol 40 (3) ◽  
pp. 229-232
Author(s):  
L. Schwabe ◽  
W. Haase
Keyword(s):  
Magnetic Susceptibility ◽  
Ground State ◽  
Title Compound ◽  
Magnetic Behaviour ◽  
Solvent Free ◽  
Magnetic Exchange ◽  
Temperature Range ◽  
Compound C ◽  
Antiferromagnetic Ground State ◽  
Van Vleck

The magnetic susceptibility of the title compound C28H56Cu4N8O8 · CHCl3 in the temperature range of 5.1 to 280.6 K will be reported. The magnetic exchange integrals were evaluated on the basis of the isotropic Heisenberg-Dirac-van Vleck-model. The magnetic behaviour is similar to the solvent free modification of the title compound, obtained by recrystallization from benzene.

The magnetic properties of antimony

1936 ◽  
Vol 32 (3) ◽  
pp. 499-502 ◽  
Author(s):  
D. Shoenberg ◽  
M.Zaki Uddin
Keyword(s):  
Magnetic Properties ◽  
Magnetic Susceptibility ◽  
Temperature Dependence ◽  
Trigonal Axis ◽  
Increasing Temperature

The magnetic susceptibility of antimony both parallel and perpendicular to the trigonal axis is independent of field down to 4° K. The numerical value of the susceptibility parallel to the trigonal axis decreases with increasing temperature, similarly to that of bismuth, but perpendicular to the trigonal axis there is no temperature dependence. The results at higher temperatures are compared with earlier measurements and the comparison suggests that the susceptibility of antimony, like that of bismuth, is very sensitive to addition of foreign elements.

scholarly journals Temperature Dependent Magnetic Susceptibility and Equilibrium Studies in Solution: Evans’s Method

2017 ◽  
Vol 1 (1) ◽  
Author(s):  
Dipesh Ghosh
Keyword(s):  
Magnetic Susceptibility ◽  
Chemical Shift ◽  
Temperature Dependence ◽  
1H Nmr ◽  
Present Review ◽  
Paramagnetic Species ◽  
Temperature Dependent ◽  
Equilibrium Studies ◽  
Chemical Shift Difference ◽  
Temperature Range

The chemical shift in a solvent caused by the presence of a paramagnetic species and the temperature dependence of the chemical shift difference to determine the temperature dependent magnetic susceptibility can be studied using Evans method. The method is very useful because a common NMR instrument, easily accessible in a department of chemistry, allows the accurate measurement of paramagnetic susceptibilities. The present review highlights planar (S = 0) and octahedral (S = 1) forms of Ni(II) complexes are in equilibrium and has been followed in the temperature range 298 − 338 K by 1H NMR technique using the protocol of Evans’s method.

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