Weiss constant of bis(pentamethylcyclopentadienyl)cobalt(III) tris(dicyanamido)cobaltate(II)

2021 ◽  
pp. 556-557
Author(s):  
R. T. Pardasani ◽  
P. Pardasani
Keyword(s):  
Weiss Constant

The Solid Solutions Gd2Cu2In1–xMgx – Drastic Increase of the Curie Temperature upon In/Mg Substitution

2010 ◽  
Vol 65 (12) ◽  
pp. 1516-1520 ◽  
Author(s):  
Wilfried Hermes ◽  
Falko M. Schappacher ◽  
Rainer Pöttgen
Keyword(s):  
Curie Temperature ◽  
Intermetallic Compounds ◽  
Solid Solutions ◽  
Temperature Increase ◽  
Magnesium Content ◽  
Lattice Parameter ◽  
Weiss Constant ◽  
Drastic Increase ◽  
Complete Set ◽  
Mg Substitution

The Mo2B2Fe-type intermetallic compounds Gd2Cu2In and Gd2Cu2Mg form a complete set of solid solutions Gd2Cu2In1−xMgx. The a lattice parameter, the Weiss constant and the Curie temperature increase with increasing magnesium content in an almost Vegard-like manner, while the c parameter remains almost constant. All members of the solid solutions show ferromagnetism with TCs between 114 and 80 K.

NUCLEAR MAGNETISM OF HELIUM-3 PRECIPITATES

2002 ◽  
Vol 16 (20n22) ◽  
pp. 3368-3368
Author(s):  
V. A. SHVARTS ◽  
K. J. KLESS ◽  
N. MATSUNAGA ◽  
E. D. ADAMS ◽  
J. X. XIA ◽  
...  
Keyword(s):  
Magnetic Susceptibility ◽  
Phase Separation ◽  
Liquid Droplet ◽  
Magnetic Ordering ◽  
Solid Sample ◽  
Nuclear Magnetism ◽  
Weiss Constant ◽  
Simultaneous Measurements ◽  
Helium 3 ◽  
Made In

Simultaneous measurements of magnetic susceptibility from 0.5 to 10 mK and pressure from 2.88 to 3.54 MPa have been made in 3He nanoclusters embedded in a 4He matrix, following phase separation. The susceptibility of the 3.54 MPa, all –solid sample behaves similarly to that of bulk 3He for v = 21.3 cm3/mole, with a Weiss constant θ = -250μK. For the 2.88 MPa, liquid-droplet sample, θ = 140μK, indicating a ferromagnetic tendency, similar to 2-D films at some coverages. At intermediate pressures, χ has a peak near 1.05 mK, but without a discontinuity. For all samples, χ had a solid-like contribution to the lowest temperatures. Magnetic ordering in nano-clusters appears to be different than the U2D2 phase of bulk 3He.

Synthesis-Controlled Polymorphism, Magnetic and Electrochemical Properties of Li3Co2SbO6

2019 ◽  
Author(s):  
Alex J. Brown ◽  
Brendan J. Kennedy ◽  
Chris D. Ling
Keyword(s):  
Particle Size ◽  
Rock Salt ◽  
Strong Field ◽  
Lithium Ion ◽  
Poor Performance ◽  
Zero Field ◽  
Weiss Constant ◽  
Ferromagnetic Interactions ◽  
Phase Scan ◽  
Conventional Solid State Synthesis

<div>Li3Co2SbO6 is found to adopt two highly distinct structural forms: a hexagonal layered O3- LiCoO2 type phase with “honeycomb” 2:1 ordering of Co and Sb; and an orthorhombic superstructure of rock-salt type, isostructural with Li3Co2TaO6 but with the addition of significant Li/Co ordering. Pure samples of both phase scan be obtained by conventional solid-state synthesis from the same precursors, Li3SbO4 and CoO, by controlling particle size and reaction time. Both phases show relatively poor performance as lithium-ion battery cathode materials in their as-made states, but complex and interesting low-temperature magnetic properties. The honeycomb phase orders antiferromagnetically below TN = 14 K, but a positive Weiss constant θw = 18.1 K points to strong ferromagnetic interactions in the paramagnetic regime above TN; and isothermal magnetisation below TN shows evidence for a field-induced “spin-flop” transition at H ~ 0.7 T. The rock-salt type superstructure phase orders antiferromagnetically below TN = 112 K, then undergoes two more transitions at 80 K and 60, suggesting close competition between at least three ground states. Consistent with such competition, the Weiss constant θw = -181 K indicates some frustration, there is a strong field-cooled / zero field-cooled divergence below TN, and isothermal magnetisation shows it to be magnetically soft with low coercivity.<br></div>

Synthesis, Structure Determination, and Magnetic Properties of [Cr3(dpa)4Cl2][CuCl2], a Compound Comprising a Trinuclear Chain Cation

2012 ◽  
Vol 67 (8) ◽  
pp. 759-764 ◽  
Author(s):  
Dilahan Aydin-Cantürk ◽  
Hanne Nuss Max-Planck
Keyword(s):  
Crystal Structure ◽  
Magnetic Properties ◽  
Partial Oxidation ◽  
Ethyl Ether ◽  
Structure Determination ◽  
Magnetic Moment ◽  
Effective Magnetic Moment ◽  
X Ray ◽  
Weiss Constant ◽  
Paramagnetic Behavior

The new compound [Cr3(dpa)4Cl2][CuCl2] (1) (dpa = di-2,2'-pyridylamido) was synthesized by reacting Cr2(dpa)4 and anhydrous CuCl2 in dry tetrahydrofuran. Partial oxidation of Cr2(dpa)4 by Cu(II) forms Cr3+ ions, which coordinate to the free N donor atoms of the dpa ligands, and led to the formation of a trinuclear chain cation [Cr3(dpa)4Cl2]+. Recrystallization from CH2Cl2/ethyl ether yielded dark-brown, block-shaped crystals suitable for X-ray structure determination (Pccn (no. 56), a=1246:8(5), b=1487:3(3), c=2184:8(1) pm, V =4051.6(8) ·106 pm3, Z =4). The crystal structure is composed of discrete [Cr3(dpa)4Cl2]+ cations and [CuCl2]- anions. The Cr3 chain comprises quadruply-bonded diamagnetic (Cr2)4+ dimers and a pseudo-octahedrally coordinated, paramagnetic Cr3+ ion, manifesting itself in the effective magnetic moment μeff of 3:54μB (d3, S = 3=2) and the almost ideal Curie-paramagnetic behavior observed between 2 and 300 K with a Weiss constant θ = -0:25(4)K and χ0 = 4:9(7)×10-4 emu mol-1

Magnetic properties of reaction products of chromocene and aliphatic alcohols

1979 ◽  
Vol 44 (1) ◽  
pp. 80-84 ◽  
Author(s):  
Jiří Votinský ◽  
Jaroslava Kalousová ◽  
Milan Nádvorník ◽  
Jiří Klikorka ◽  
Karel Komárek
Keyword(s):  
Magnetic Properties ◽  
Magnetic Moment ◽  
Aliphatic Alcohols ◽  
Reaction Products ◽  
Weiss Constant ◽  
Unpaired Electrons

Chromocene reacts with aliphatic alcohols (n = 1 to 4) at 20 °C to give cyclopentadiene and very reactive chromium(II) alcoholates. All the prepared alcoholates are antiferromagnetic compounds with the Weiss constant -280 to -170 K. The magnetic moment corresponds to contribution of four unpaired electrons and to d4 configuration of Cr(II) atom. An interpretation of the antiferromagnetism of the alcoholates is suggested.

scholarly journals The Crystal Structure of RbNiCl3 and RbNiBr3. The Weiss Constant in Relation to the Crystal Structure of some Double Halides of the Type ANiX3.

1969 ◽  
Vol 23 ◽  
pp. 2055-2060 ◽  
Author(s):  
R. W. Asmussen ◽  
T. Kindt Larsen ◽  
H. Soling ◽  
Lena Torbjörnsson ◽  
Per-Erik Werner ◽  
...  
Keyword(s):  
Crystal Structure ◽  
Weiss Constant
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