TIN ADDITION TO THE (Bi, Pb) 2223 SYSTEM

1994 ◽  
Vol 08 (19) ◽  
pp. 1175-1183 ◽  
Author(s):  
G. RAVI CHANDRA ◽  
B. GOPALA KRISHNA ◽  
S. V. SURYANARAYANA ◽  
T. S. N. MURTHY
Keyword(s):  
Heat Treatment ◽  
Magnetic Susceptibility ◽  
Electrical Resistance ◽  
Volume Fraction ◽  
Ac Magnetic Susceptibility ◽  
Superconducting Properties ◽  
X Ray Diffraction ◽  
Metallic Behavior ◽  
X Ray

The effect of the addition of Sn on the superconducting properties of the Bi 1.7 Pb 0.3 Sr 2 Ca 2 Cu 3 O y system as functions of Sn concentration and heat treatment has been studied by dc electrical resistance, ac magnetic susceptibility, and X-ray diffraction. Tin addition suppresses the volume fraction of the high T c phase. Samples with Sn > 0.1 show metallic behavior up to LNT. The formation of the Ca 2 PbO 4 phase is promoted by Sn. This depletes the amount of Pb and Ca necessary for the formation of the 2223 phase, thus reducing the volume fraction of the 2223 phase. It is possible that at least a small fraction of tin substitutes some of the cationic sites of the starting composition. The results of the different measurements are presented.

Effect of the BSCCO superconducting properties by tiny Y2O3 addition

2016 ◽  
Vol 30 (26) ◽  
pp. 1650328
Author(s):  
Yan Dong ◽  
Aimin Sun ◽  
Bin Xu ◽  
Hongtao Zhang ◽  
Meng Zhang
Keyword(s):  
Volume Fraction ◽  
Superconducting Properties ◽  
X Ray Diffraction ◽  
Critical Transition Temperature ◽  
Solid State Reaction Technique ◽  
X Ray ◽  
Oxide Addition ◽  
One Step ◽  
Step Transition ◽  
Y2o3 Addition

In this paper, the effect of tiny Y2O3 addition in (Bi,[Formula: see text]Pb)-2223 superconductor prepared by solid state reaction technique was studied. The properties of samples have been investigated via X-ray diffraction (XRD), resistance–temperature ([Formula: see text]–[Formula: see text]) curve, scanning electron microscope (SEM) and energy dispersive spectroscopy (EDS). XRD data indicated that all samples are multiphase and the major phases are high-temperature phases and low-temperature phases. The volume fraction of (Bi,[Formula: see text]Pb)-2223 is not great change with tiny Y2O3 addition. All samples exhibit superconducting phase with the critical transition temperature and one-step transition, however, the transition width was decreased with the Y2O3 addition up to 0.04 wt.% and sharp increased with the excessive oxide addition. SEM pictures show that the Y2O3 appeared on the flake-type grains surface obviously, but the number and size of the hole between grains are decreased in the 0.04 wt.% addition.

Synthesis, Structure and Magnetism of ErCoIn5

2004 ◽  
Vol 848 ◽  
Author(s):  
Evan Lyle Thomas ◽  
Erin E. Erickson ◽  
Monica Moldovan ◽  
David P. Young ◽  
Julia Y. Chan
Keyword(s):  
Magnetic Properties ◽  
Electrical Resistivity ◽  
Magnetic Susceptibility ◽  
Single Crystal ◽  
Experimental Results ◽  
Flux Growth ◽  
X Ray Diffraction ◽  
Metallic Behavior ◽  
X Ray ◽  
Growth Method

AbstractA new member of the LnMIn5 family, ErCoIn5, has been synthesized by a flux-growth method. The structure of ErCoIn5 was determined by single crystal X-ray diffraction. It crystallizes in the tetragonal space group P4/mmm, Z = 1, with lattice parameters a = 4.5400(4) and c = 7.3970(7) Å, and V = 152.46(2) Å3. Electrical resistivity data show metallic behavior. Magnetic susceptibility measurements show this compound to be antiferromagnetic with TN = 5.1 K. We compare these experimental results with those of LaCoIn5 in an effort to better understand the effect of the structural trends observed on the transport and magnetic properties.

Structural Characterization of Co70-xNixGa30 Ferromagnetic Shape Memory Alloys

2008 ◽  
Vol 52 ◽  
pp. 103-108 ◽  
Author(s):  
Sidananda Sarma ◽  
A. Srinivasan
Keyword(s):  
Magnetic Susceptibility ◽  
Shape Memory ◽  
Room Temperature ◽  
Structural Parameters ◽  
Ac Magnetic Susceptibility ◽  
X Ray Diffraction ◽  
Ferromagnetic Shape Memory Alloys ◽  
Two Phase ◽  
X Ray ◽  
Ferromagnetic Shape Memory

Polycrystalline ingots of Co70–xNixGa30 (20 ≤ x ≤ 26) ferromagnetic shape memory alloy (FSMA) were prepared by arc melting elemental powders followed by homogenization at 1230 °C for 24 hrs and quenching in liquid nitrogen. Room temperature X-Ray diffraction (XRD) patterns of as-quenched samples exhibited single-phase tetragonal structure for alloy compositions with x = 21 to 26, and a two-phase structure (cubic A2-phase along with weak tetragonal phase) for the alloy with x = 20. Rietveld refinement was performed on the X-ray diffraction patterns to obtain the refined structural parameters. Differential Scanning Calorimeter (DSC) curves recorded from 30 °C to 250 °C revealed martensite-austenite and austenite-martensite transformations in all alloys except the alloy with composition x = 20. Low temperature ac magnetic susceptibility measurements confirmed the existence of martensitic transformations in the alloy with x = 20. The structural transformation temperatures show a linear variation with e/a ratio. All the alloys were ferromagnetic at room temperature. Curie temperature was determined using a high temperature ac magnetic susceptibility measurement set-up.

AC MAGNETIC SUSCEPTIBILITY INVESTIGATION OF THE INTERGRAIN VORTEX PINNING INVOLVING Er IONS IN BULK (Bi1.6Pb0.4)(Sr1.8Ba0.2)(Ca1-xErx)2Cu3Oy SUPERCONDUCTOR

2000 ◽  
Vol 14 (12) ◽  
pp. 447-453 ◽  
Author(s):  
A. V. POP
Keyword(s):  
Volume Fraction ◽  
Ac Susceptibility ◽  
Field Amplitude ◽  
Vortex Pinning ◽  
Ac Magnetic Susceptibility ◽  
X Ray Diffraction ◽  
Conventional Solid State Reaction ◽  
X Ray ◽  
Bulk System ◽  
Flux Diffusion

Bulk superconducting samples with composition ( Bi 1.6 Pb 0.4)( Sr 1.8 Ba 0.2)( Ca 1-x Er x)2 Cu 3 O y (0 ≤ x ≤ 0.02 Er ) were prepared by conventional solid-state reaction. X-ray diffraction confirmed that with increasing Er concentration, the volume fraction of 2223 phase decreases. The intergranular vortex dynamics (and the effective pinning barrier) of the bulk system have been investigated by ac susceptibility as a function of temperature, frequency and ac field amplitude. The effect of Er ion on the intergrain vortex pinning was characterized quantitatively by using a flux diffusion model in which the effective pinning barrier depends nonlinearly on the current density.

Synthesis, X-ray diffraction and AC magnetic susceptibility investigations of HgBa2CuO4+δ

1994 ◽  
Vol 229 (1-2) ◽  
pp. 165-168 ◽  
Author(s):  
H.R. Khan ◽  
O. Loebich ◽  
P. Fabbricatore ◽  
A. Sciutti ◽  
B. Zhang
Keyword(s):  
Magnetic Susceptibility ◽  
Ac Magnetic Susceptibility ◽  
X Ray Diffraction ◽  
X Ray

BISMUTH PARTIAL SUBSTITUTION EFFECT ON PROPERTIES OF THE Bi2Sr2Ca2Cu3OZ SYSTEM

2002 ◽  
Vol 16 (20) ◽  
pp. 769-774
Author(s):  
S. SIMON ◽  
R. V. F. TURCU ◽  
M. POP ◽  
Gh. BORODI
Keyword(s):  
Heat Treatment ◽  
Diffraction Analysis ◽  
Liquid Nitrogen ◽  
Substitution Effect ◽  
Liquid Nitrogen Temperature ◽  
Partial Substitution ◽  
Superconducting Properties ◽  
X Ray Diffraction ◽  
Static Susceptibility ◽  
X Ray

The effect of bismuth partial substitution by lead, cadmium or tin on the properties of the polycrystalline systems Bi 2-x M x Sr 2 Ca 2 Cu 3 O z (M = Pb, Cd or Sn) was investigated. The samples were obtained from amorphous precursors by heat treatment applied in several stages. X-ray diffraction analysis and static susceptibility measurements were carried out in order to characterize the structure and to check the superconducting properties of the investigated samples. Superconducting behavior above liquid nitrogen temperature was evidenced only for the partial substitution of Bi with x = 0.2 Pb and x = 0.1 Sn.

Non-destructive measurement of the depth profile of the constituent in iron oxide scale by X-ray diffraction at SPring-8

2011 ◽  
Vol 1 (SRMS-7) ◽  
Author(s):  
M. Sato ◽  
T. Doi ◽  
Y. Hidaka ◽  
Y. Higashida ◽  
Y. Masaki ◽  
...  
Keyword(s):  
Heat Treatment ◽  
Iron Oxide ◽  
Volume Fraction ◽  
Diffraction Measurement ◽  
Isothermal Heat Treatment ◽  
Oxide Scales ◽  
X Ray Diffraction ◽  
X Ray ◽  
Destructive Measurement ◽  
Non Destructive

The depth profiles of the constituent in iron oxide scales were investigated by X-ray diffraction measurement with controlling X-ray penetration depth at SPring-8. We successfully observed the interface region of scales non-destructively using X-ray with energy of 28 keV. The results indicated that the volume fraction ratio of Fe3O4 to FeO around the surface of samples increased by isothermal heat treatment. This suggested that the transformation of FeO to Fe3O4 due to isothermal heat treatment proceeds from surface into the inside of scale.

Synthesis and Superconducting Properties of Metastable Y(Ba2−xYx)Cu3O7+δ

1987 ◽  
Vol 99 ◽  
Author(s):  
Z. Iqbal ◽  
F. Reidinger ◽  
A. Bose ◽  
N. Cipollini ◽  
H. Eckhardt ◽  
...  
Keyword(s):  
Volume Fraction ◽  
Parent Compound ◽  
Resistive Transition ◽  
Superconducting Properties ◽  
X Ray Diffraction ◽  
X Ray ◽  
Recent Interest ◽  
Superconducting Volume Fraction ◽  
Citrate Precursor ◽  
Reaction Routes

ABSTRACTThe oxygen-deficient orthorhombic oxide YBa2Cu3O7-δ has been the center of intense recent interest because of its high Tc superconducting proper-ties[l-3]. Recently, the structurally related La3Ba3Cu3O15-δ, has received increasing attention[4–9]. The pure Y analog[10,11] cannot be synthesized by usual solid state reaction routes probably because of its metastability near 880°C. Here we report on the successful synthesis of pure tetragonal Y3,Ba3CU6O15-δ (referred to as Y 3–3–6), via the firing of an atomically mixed citrate precursor at a relatively low temperature. X-ray diffraction data characterize Y 3–3–6 to be isostructural with the corresponding La compound[4]. The unit cell composition can then be written as: Y(Ba2−x Yx) CU3O7+δ with the parent compound at x = 0.50. Specimens of Y 3–3–6 at × = 0.50 and 0.375 annealed at 650°C under 1 atmosphere of O2 are non-superconducting. Higher pressure O2 annealing and fluorine-doping leads to a 1–5% superconducting volume fraction with onset at 85K. Annealing near 880°C creates a 10% superconducting fraction which shows near-zero resistivity at 62K and a reproducible, small resistive transition near 260K.

Synthesis and Characterization of Magnesium Diboride Additions of Bi-2223 on the Microstructure and Superconducting Transition

2019 ◽  
Vol 290 ◽  
pp. 233-238 ◽  
Author(s):  
Arlina Binti Ali ◽  
Abdul Halim Shaari ◽  
Soo Kien Chen ◽  
Julie Juliewatty Mohamed ◽  
Nurul’ain Mohd Kamal ◽  
...  
Keyword(s):  
Volume Fraction ◽  
Magnesium Diboride ◽  
Superconducting Transition ◽  
X Ray Diffraction ◽  
Solid State Method ◽  
Metallic Behavior ◽  
Volume Percentage ◽  
X Ray ◽  
State Method

In this paper, solid state method was using to synthesize the of magnesium diboride (MgB2) added in Bi 1.6Pb 0.4Sr2Ca2Cu3Oδ(Bi-2223) superconductor from 0.00 to 0.10 wt.%. The effect on additions were investigated through X-ray Diffraction (XRD), resistance-temperature (R-T) measurement and Scanning Electron Microscope (SEM). From the XRD result, volume fraction of Bi-2223 showed the highest volume percentage was 76 % correspond to addition with MgB2=0.02 wt.% and slightly decreased the percentage while increased the additions. From the R-T measurement, all samples showed the metallic behavior in the normal state. Morphology images showed that the grains were flaky plates and the size slightly increased. These results revealed that, additions of magnesium diboride change the microstructure and decrease the superconducting transition.

Superconducting properties of BaBi3 at ambient and high pressures

2021 ◽  
Author(s):  
Yanan Wang ◽  
Tomoya Taguchi ◽  
Huan Li ◽  
Ai Suzuki ◽  
Yanting Zhang ◽  
...  
Keyword(s):  
Magnetic Susceptibility ◽  
Electrical Transport ◽  
High Pressures ◽  
Superconducting Properties ◽  
X Ray Diffraction ◽  
X Ray

Herein, we report the preparation and characterization of BaBi3 clarified by DC magnetic susceptibility, powder X-ray diffraction (XRD), and electrical transport. The superconducting properties of BaBi3 were elucidated by the...

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