MAGNETIC PROPERTIES OF U1-xYxMnAl SYSTEM

2004 ◽  
Vol 18 (30) ◽  
pp. 1543-1549
Author(s):  
ILEANA LUPSA
Keyword(s):  
Magnetic Properties ◽  
Magnetic Moment ◽  
Effective Magnetic Moment ◽  
Magnetic Measurements ◽  
Spin Fluctuation ◽  
Uranium Atom ◽  
Temperature Range

The magnetic measurements on U 1-x Y x MnAl system were performed in the 4–600 K temperature range and fields up to 70 kOe. YMnAl presents spin fluctuation characteristics due to manganese atoms with a Curie–Weiss type behavior over the T* temperature. The gradual substitution of uranium for yttrium leads to similar behavior evidencing higher molar Curie constants and supporting a contribution due to uranium atom. The effective magnetic moment on uranium positions is that of U 3+ ion (3.1μB) and is composition-independent. The spin fluctuating state of manganese is characterized by the effective magnetic moment of 3μB/ Mn atom. The intrinsic Mn moment order is discussed in the critical Mn – Mn separation term.

Magnetic Properties of the U1-xYxNiAl System

2003 ◽  
Vol 17 (22) ◽  
pp. 1181-1185 ◽  
Author(s):  
P. Lucaci ◽  
Ileana Lupsa
Keyword(s):  
Magnetic Properties ◽  
Magnetic Moment ◽  
Effective Magnetic Moment ◽  
Uranium Atom ◽  
Absolute Magnitude ◽  
Spin Fluctuations ◽  
Temperature Range ◽  
Yttrium Content ◽  
Curie Temperatures

The magnetic properties of the U 1-x Y x NiAl system were studied in the 4–600 K temperature range fields up to 7 T. The systems with x≤0.8 were analyzed in terms of the spin fluctuations theory. The system presents a Curie–Weiss type behavior over a certain temperature T*. The paramagnetic Curie temperatures are negative and decrease in absolute magnitude as yttrium content increases. The effective magnetic moment per uranium atom is composition independent (≈3.1 μB) proving the presence of temperature induced spin fluctuations.

MAGNETIC PROPERTIES OF U1-xDyxAlyNi5-y (y=0,1) SYSTEMS

2003 ◽  
Vol 17 (27n28) ◽  
pp. 1453-1460
Author(s):  
ILEANA LUPSA
Keyword(s):  
Magnetic Properties ◽  
Low Temperature ◽  
Spin Fluctuation ◽  
Magnetic Moments ◽  
Transition Temperatures ◽  
Temperature Range ◽  
Fluctuation Model ◽  
Magnetically Ordered

The magnetic properties of U 1-x Dy x Al y Ni 5-y (y=0,1) systems were investigated in the 2(5)–600 K temperature range and for fields up to 80 kOe. The systems having x≥0.2 are magnetically ordered with low transition temperatures and magnetization mainly due to the Dy contribution. The nickel exhibits magnetic moments, very weak in the low temperature range and well-defined effective moments over transition temperatures. The nickel behavior is discussed in terms of the spin fluctuation model.

THE COMBINED ANALYSIS OF SPECIFIC HEAT AND THERMAL EXPANSION OF Nd1−xLuxMn2 COMPOUNDS

1993 ◽  
Vol 07 (01n03) ◽  
pp. 810-813
Author(s):  
N.H. KIM-NGAN ◽  
P.E. BROMMER ◽  
J.J.M. FRANSE
Keyword(s):  
Magnetic Properties ◽  
Thermal Expansion ◽  
Thermodynamic Properties ◽  
Specific Heat ◽  
Crystal Field ◽  
Spin Fluctuation ◽  
Spin Reorientation ◽  
Antiferromagnetic Order ◽  
Combined Analysis ◽  
Temperature Range

Specific heat and thermal expansion measurements have been performed on Nd1−xLUxMn2 in the temperature range between 1.5K and 300K. Below 10K, anomalies are observed which are ascribed to a spin reorientation of the Nd sublattice. These anomalies are only slightly affected by the substitution of Nd by Lu. Large effects, however, are observed on the magnetic properties of the Mn sublattice. The antiferromagnetic order disappears for x exceeding 0.30. The data are analysed in terms of Grüneisen parameters. In the paramagnetic compound LuMn2, a spin-fluctuation contribution to the thermodynamic properties is observed. In the Nd-containing compounds, distinct contributions from the crystal field acting on the Nd ions can be distinguished. The variation of the magnetic properties of the Mn sublattice with the concentration of Lu is discussed.

Ab initio calculation of magnetic properties of p-block element doped ZnO

RSC Advances ◽  
2014 ◽  
Vol 4 (85) ◽  
pp. 45598-45602 ◽  
Author(s):  
Palash Nath ◽  
Anirban Chakraborti ◽  
D. Sanyal
Keyword(s):  
Magnetic Properties ◽  
Ab Initio ◽  
Magnetic Moment ◽  
Ab Initio Calculation ◽  
Effective Magnetic Moment ◽  
Block Element ◽  
System P ◽  
Doped Zno

Effective magnetic moment for Zn54O53X (X = B, C, N, F, Al, Si, P, Cl, Ga, Ge, As) system.

Crystal Structure and Magnetic Properties of (2,2'-Dipyridyl)-(2-acetylphenolato)copper(II) Perchlorate

2002 ◽  
Vol 57 (10) ◽  
pp. 1129-1132 ◽  
Author(s):  
A. Elmali ◽  
Y. Elerman ◽  
I. Svoboda
Keyword(s):  
Crystal Structure ◽  
Magnetic Properties ◽  
Magnetic Susceptibility ◽  
Magnetic Moment ◽  
Basal Plane ◽  
Effective Magnetic Moment ◽  
Mixed Ligand ◽  
Magnetic Susceptibility Data ◽  
Susceptibility Data ◽  
Dimeric Unit

The mixed-ligand dinuclear complex (2,2'-dipyridyl)-(2-acetylphenolato)copper(II) perchlorate was synthesized and its crystal structures determined. The structure consists of a dimeric unit involving a planar Cu2O2 group. The coordination sphere of the Cu atom can be described as an alongated octahedron where the basal plane is formed by the two N atoms of the 2,2'-dipyridyl molecule and the two O atoms of the acetophenon anion. Two apical Cu - O contacts complete the 4+2 coordination of the Cu atoms. They correspond to one of the O atoms of the perchlorate anion and to the O atom of the second unit. Magnetic susceptibility data obey the Curie-Weiss law with θ = -8.1(2) K. The decreasing of the effective magnetic moment from 1.94(8) μB at 300 K to 1.86(8) μB at 70 K and the negative Weiss constant indicate weak antiferromagnetic interactions between the two copper atoms in the dimeric units.

Structure and Magnetic Properties of a Dinuclear Complex with Iron(III) in Octahedral and Pyramidal Coordination

1994 ◽  
Vol 49 (9) ◽  
pp. 1239-1242 ◽  
Author(s):  
Ayhan Elmali ◽  
Yalcin Elerman ◽  
Ingrid Svoboda ◽  
Hartmut Fuess ◽  
Klaus Griesar ◽  
...  
Keyword(s):  
Crystal Structure ◽  
Magnetic Properties ◽  
Magnetic Susceptibility ◽  
Magnetic Moment ◽  
Effective Magnetic Moment ◽  
Dinuclear Complex ◽  
Monoclinic Space Group ◽  
Temperature Dependent ◽  
Space Group ◽  
Binuclear Unit

[FeL(MeOH)Cl]2 (L = N-(2-hydroxyphenyl)salicylaldimine) was synthesized and its crystal structure determined, [C27H20N 2O5Cl2Fe2], monoclinic, space group P21/c, a = 9.528(1), b = 7.684(1), c = 18.365(2) Å, β = 109.83(1)°, V = 1264.8 Å3, Z = 2. Two identical [FeL(MeOH)Cl] fragments, related by an inversion centre, are combined by the two bridging O atoms, to form a binuclear unit. The iron(III) centers are separated by 3.163(2) Å and weakly antiferromagnetically coupled (J = -8 .0 (1 ) cm-1), which follows from temperature - dependent magnetic susceptibility measurements in the range 4.2 to 288 K. The effective magnetic moment per iron(III) is μeff = 7.4 μB at 288 K

A water-soluble gadolinium metallofullerenol: facile preparation, magnetic properties and magnetic resonance imaging application

2016 ◽  
Vol 45 (21) ◽  
pp. 8696-8699 ◽  
Author(s):  
Jie Li ◽  
Taishan Wang ◽  
Yongqiang Feng ◽  
Ying Zhang ◽  
Mingming Zhen ◽  
...  
Keyword(s):  
Magnetic Resonance Imaging ◽  
Magnetic Properties ◽  
Magnetic Resonance ◽  
Magnetic Moment ◽  
Effective Magnetic Moment ◽  
Water Soluble ◽  
Resonance Imaging ◽  
Imaging Application ◽  
Facile Preparation ◽  
Imaging Performance

A new water-soluble gadolinium metallofullerenol with an enhanced effective magnetic moment and improved T1-weighted relaxivity and magnetic resonance imaging performance in the liver.

scholarly journals MAGNETIC PROPERTIES OF SINGLE CRYSTALS (MnIn2S4)1–х–(AgIn5S8)х SOLID SOLUTIONS

Doklady BGUIR ◽  
2019 ◽  
pp. 95-99
Author(s):  
I. V. Bodnar ◽  
Bin Tkhan Chan
Keyword(s):  
Magnetic Properties ◽  
Magnetic Fields ◽  
Single Crystals ◽  
Solid Solutions ◽  
Magnetic Moment ◽  
Temperature Range ◽  
Bridgeman Method ◽  
The Given ◽  
Specific Magnetic Moment

Single crystals of solid solutions (MnIn2S4)1-х–(AgIn5S8)х have been grown with the Bridgeman method in the whole range of temperatures. The crystals structure and composition were determined. The study of the given single crystals in the temperature range 2–300 К and magnetic fields to 10 T was carried out. It is set that the given crystals are paramagnetic in the whole studied range. The specific magnetic moment increases with the temperature.  

AsPh4)2[Re2FN2Cl7], ein μ-Fluoro-Nitridokomplex des Rhenium(VI) / (AsPh4)2[Re2FN2Cl7],a μ-Fluoro Nitrido Complex of Rhenium(VI)

1980 ◽  
Vol 35 (3) ◽  
pp. 326-328 ◽  
Author(s):  
Werner Liese ◽  
Kurt Dehnicke ◽  
Jürgen Pebler
Keyword(s):  
Magnetic Susceptibility ◽  
Magnetic Moment ◽  
Ir Spectrum ◽  
Effective Magnetic Moment ◽  
Complex Anion ◽  
Acetonitrile Solution ◽  
Temperature Range

(AsPh4)2[Re2FN2Cl7] is prepared by the reaction of ReNCL4 with AsPh4F in acetonitrile solution. The IR spectrum indicates a bridging Re-F-Re complex anion with terminal Re ≡ N ligands. The magnetic susceptibility was measured in the temperature range of 4.8-280 K. The effective magnetic moment is 1.66 B.M. per Re atom (θ = -0.5 K) and corresponds well with Re(VI). The magnetic moment of the well known PPh4[ReNCl4] has also been studied {μeff = 1.67 B.M.; θ = -1.2 K).

Transition from Itinerant Electron Magnetism to Localized Spin Magnetism in Ni3Al1-YMny Alloys

2010 ◽  
Vol 168-169 ◽  
pp. 149-152 ◽  
Author(s):  
A.V. Korolyov ◽  
N.I. Kourov ◽  
S.Z. Nazarova ◽  
Y.A. Dorofeev ◽  
N.V. Volkova ◽  
...  
Keyword(s):  
Magnetic Properties ◽  
Magnetic Susceptibility ◽  
Curie Temperature ◽  
Magnetic Moment ◽  
Effective Magnetic Moment ◽  
Average Distance ◽  
Magnetic Moments ◽  
Itinerant Electron ◽  
Spin Magnetism ◽  
Spontaneous Magnetic Moment

Magnetic properties of Ni3Al1-yMny alloys at y≤0.6 were investigated at T≤400 K in magnetic fields H≤4 MA/m. The concentration y dependencies of the spontaneous magnetic moment s, the effective magnetic moment eff, the Curie temperature ТС, the Weiss constant , and the temperature independent part of the magnetic susceptibility 0 were determined. The behavior of the Rhodes-Wohlfarth parameter р(y) in the transition region from the itinerant electron magnetism to the spin localized one is related to the increase in the spontaneous magnetic moment of Ni atoms inversely proportional to the average distance between Mn atoms with the highly localized magnetic moments.

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