Effect of Titanium, Zirconium and Niobium on Lattice Parameter, Density and Magnetic Saturation Moment of Ni0.5Zn0.5Fe2O4

1983 ◽  
Vol 42 (1) ◽  
pp. 9-14 ◽  
Author(s):  
P. K. Das ◽  
A. R. Das
Keyword(s):  
Lattice Parameter ◽  
Magnetic Saturation ◽  
Saturation Moment ◽  
Titanium Zirconium ◽  
Parameter Density

Magnetic properties of (NixCu1−x)2MnSn

1977 ◽  
Vol 55 (17) ◽  
pp. 1481-1484 ◽  
Author(s):  
R. A. MacDonald ◽  
C. V. Stager
Keyword(s):  
Magnetic Properties ◽  
Curie Temperature ◽  
Heusler Alloy ◽  
Room Temperature ◽  
Manganese Atom ◽  
Lattice Parameter ◽  
Alloy Series ◽  
Saturation Moment ◽  
Curie Temperatures

Magnetization and crystallographic measurements are reported for the Heusler alloy series (NixCu1−x)2MnSn. With the exception of Cu2MnSn and perhaps (Ni0.1Cu0.9)2MnSn all of the samples prepared had the cubic Heusler L21 structure at room temperature. The lattice parameter varies linearly as a function of composition. The saturation moment is constant at approximately 4μβ per manganese atom throughout the series. Curie temperatures vary smoothly but non-linearly with composition, providing some evidence for at least two competing mechanisms in the determination of the Curie temperature.

Structure and Magnetostriction of Melt-Spun Fe81-xNixGa19(x=0,5,10,15,20,25) Alloys

2013 ◽  
Vol 372 ◽  
pp. 21-25
Author(s):  
Hao Liu ◽  
Haiou Wang ◽  
Meng Xiong Cao ◽  
Wei Shi Tan ◽  
Yang Guang Shi ◽  
...  
Keyword(s):  
Magnetic Field ◽  
Saturation Magnetization ◽  
Melt Spinning ◽  
Single Phase ◽  
Lattice Parameter ◽  
Magnetic Saturation ◽  
Saturation Magnetostriction ◽  
Positive Role ◽  
High Saturation ◽  
Melt Spun

Fe81-xNixGa19(with x ranging from 0-25 at.% Ni) ribbons were made by melt spinning method. We have studied the structural (phases, texturing, and lattice parameter), magnetic (saturation magnetization and saturation magnetostriction) properties of these ribbons. The main results are as follows: (i) For x≤10, all the ribbons are A2 single phase; for x=15, the ribbon is of A2+L12+DO3+E21 phase; for x=20, the ribbon is of A2+L12+DO3+B2 phase; for x=25, only A2 and L12 phases exist. (ii) For x=5 and 15, an obvious (211) texture was detected, whereas other ribbons are (110) textured, no (100) texture was tested. (iii) (110) texture in our ribbons brought low saturation magnetic field (Hs) and high saturation magnetostrction (λs). (iv) E21 phase played a positive role in the magnetostricion of FeNiGa ribbons.

Lattice parameter, density, and defect system of VOy

2009 ◽  
Vol 45 (6) ◽  
pp. 666-670 ◽  
Author(s):  
D. A. Davydov ◽  
A. A. Rempel
Keyword(s):  
Lattice Parameter ◽  
Defect System ◽  
Parameter Density

scholarly journals Superconductivity Measurements of (Hg,Tl)-1223 Compound Prepared in Capsule

2021 ◽  
pp. 2934-2939
Author(s):  
B. A. Aljurani ◽  
G.Y. Hermiz ◽  
M.F. Alias
Keyword(s):  
Oxygen Content ◽  
Structural Investigation ◽  
Solid State Reaction Method ◽  
Lattice Parameter ◽  
Partial Substitution ◽  
Hole Doping ◽  
High Tc ◽  
High Tc Phase ◽  
Two Phases ◽  
Parameter Density

       In this paper, investigations were carried out on the effects of simultaneous partial substitution of Tl at the Hg site on the physical properties of an Hg1-xTlxBa2Ca2Cu3O8+δ cuprate superconductor with x= 0, 0.1, 0.2, 0.3 and 0.4. Two steps of the solid state reaction method were used to prepare samples in capsule. The results showed that the optimum sintering temperature was equal to 850 ᵒC and the sintering time was equal to 20 h for the prepared samples.       The best conditions for constitution and stabilization of the high Tc phase-1223 were obtained by investigating the effects of Tl substitution on Hg site and oxygen content (δ) on the superconducting properties.          Structural investigation revealed that all the samples have a tetragonal structure with two phases, namely an Hg-1223 high Tc phase as a main phase and an Hg-1212 low Tc phase. Besides, some impurity phases like CuO and CaHgO2 were found. The increase of Tl content in Hg1-xTlxBa2Ca2Cu3O8+δ compound from 0 to 0.4 caused a change in the lattice parameter, density of the unit cell (ρm), and c/a values.         HgBa2Ca2Cu3O8+δ compound exhibited a critical transition temperature that is equal to 115 K. On the other side, the results showed that the highest Tc was 119 K for Hg0.8Tl0.2 Ba2Ca2Cu3O8+δ. The oxygen content (δ= 0.46) was expected to be the optimum hole doping for Hg0.8Tl0.2 Ba2Ca2Cu3O8+δ compound, which  means in our opinion that  δ plays a remarkable role in the assessment of Tc.

Structure of Cu6PbO8

2000 ◽  
Vol 56 (1) ◽  
pp. 22-26 ◽  
Author(s):  
Björn Winkler ◽  
Michael Chall ◽  
Chris J. Pickard ◽  
Victor Milman ◽  
Jim White
Keyword(s):  
Density Functional ◽  
Structural Parameters ◽  
Ambient Pressure ◽  
Lattice Parameter ◽  
Functional Theory ◽  
Close Packed Structure ◽  
Packed Structure ◽  
The Stability ◽  
Parameter Density ◽  
Good Agreement

First-principles quantum mechanical calculations based on density functional theory were performed for Cu_6PbO_8, hexacopper lead octaoxide, murdochite. The computed lattice parameter, density and bond lengths at ambient pressure are in good agreement with experimental data for murdochite. At about 18 GPa a phase transition is predicted, when a polymorph with a Suzuki-type structure, i.e. a close-packed structure with ordered vacancies, is proposed to become stable. The pressure dependence of the structural parameters has been calculated for the two polymorphs and their bulk moduli have been predicted. It is argued that the incorporation of halogen atoms is not a precondition for the stability of murdochite.

Coherency loss in γ' precipitates in nickel-base superalloy

1983 ◽  
Vol 41 ◽  
pp. 244-245
Author(s):  
R. A. Ricks ◽  
Angus J. Porter
Keyword(s):  
Lattice Mismatch ◽  
Lattice Parameter ◽  
Nickel Base Superalloy ◽  
Large Size ◽  
The Matrix ◽  
Nimonic 80A ◽  
Interfacial Dislocations ◽  
Nickel Base ◽  
Coherency Loss ◽  
Nimonic 115

During a recent investigation concerning the growth of γ' precipitates in nickel-base superalloys it was observed that the sign of the lattice mismatch between the coherent particles and the matrix (γ) was important in determining the ease with which matrix dislocations could be incorporated into the interface to relieve coherency strains. Thus alloys with a negative misfit (ie. the γ' lattice parameter was smaller than the matrix) could lose coherency easily and γ/γ' interfaces would exhibit regularly spaced networks of dislocations, as shown in figure 1 for the case of Nimonic 115 (misfit = -0.15%). In contrast, γ' particles in alloys with a positive misfit could grow to a large size and not show any such dislocation arrangements in the interface, thus indicating that coherency had not been lost. Figure 2 depicts a large γ' precipitate in Nimonic 80A (misfit = +0.32%) showing few interfacial dislocations.

Characterization of carbides in M50NiL

1991 ◽  
Vol 49 ◽  
pp. 606-607
Author(s):  
L. S. Lin ◽  
K. P. Gumz ◽  
A. V. Karg ◽  
C. C. Law
Keyword(s):  
Temperature Effects ◽  
Base Composition ◽  
Lattice Parameter ◽  
Control Surface ◽  
Carbide Formation ◽  
Particle Sizes ◽  
Low Carbon ◽  
Fee Structure ◽  
Heat Treated

Carbon and temperature effects on carbide formation in the carburized zone of M50NiL are of great importance because they can be used to control surface properties of bearings. A series of homogeneous alloys (with M50NiL as base composition) containing various levels of carbon in the range of 0.15% to 1.5% (in wt.%) and heat treated at temperatures between 650°C to 1100°C were selected for characterizations. Eleven samples were chosen for carbide characterization and chemical analysis and their identifications are listed in Table 1.Five different carbides consisting of M6C, M2C, M7C3 and M23C6 were found in all eleven samples examined as shown in Table 1. M6C carbides (with least carbon) were found to be the major carbide in low carbon alloys (<0.3% C) and their amounts decreased as the carbon content increased. In sample C (0.3% C), most particles (95%) encountered were M6C carbide with a particle sizes range between 0.05 to 0.25 um. The M6C carbide are enriched in both Mo and Fe and have a fee structure with lattice parameter a=1.105 nm (Figure 1).

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