Superconducting properties of BaBi3 at ambient and high pressures

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.

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Effects of strain on La0.67-x Prx Ca0.33 MnO3, LaMn1-x Cox O3 and LaMn1-x Nix O3 magnetite samples

DYNA ◽

10.15446/dyna.v86n211.78081 ◽

2019 ◽

Vol 86 (211) ◽

pp. 278-287

Author(s):

Javier Alberto Olarte Torres ◽

María Cristina Cifuentes Arcila ◽

Harvey Andrés Suárez Moreno

Keyword(s):

Compressive Strength ◽

Magnetic Susceptibility ◽

Sol Gel ◽

Morphological Characterization ◽

Electric Resistivity ◽

The Other ◽

X Ray Diffraction ◽

Metal Insulator ◽

X Ray

This paper presents the results obtained from the synthesis and morphological characterization of different magnetite samples: La0.67-x Prx Ca0.33 MnO3.LaMn1-x Cox O3 and LaMn1-x Nix O3 at 0.13 ≤ 𝑥𝑥 ≤ 0.67 produced by a solid-state reaction mechanism and 𝐿𝐿𝐿𝐿𝑀𝑀𝑀𝑀1−𝑥𝑥(𝐶𝐶𝐶𝐶/𝑁𝑁𝑁𝑁)𝑥𝑥𝑂𝑂3 at 0.0 ≤ 𝑥𝑥 ≤ 0.5 produced by the sol-gel method. These samples were characterized using X-ray diffraction spectroscopy and by measuring electric resistivity and magnetic susceptibility which were carried out as a function of temperature. Notably, the effects of strain and compressive strength on the lattices of magnetite samples were highly dependent on the concentration of 𝑃𝑃𝑟𝑟, 𝐶𝐶𝐶𝐶, and 𝑁𝑁𝑁𝑁. Moreover, the transition temperatures of metal-insulator and ferromagnetic-paramagnetic phases also largely depend on these strength effects, e.g., at higher concentrations of 𝑃𝑃𝑟𝑟, effects of increased strain strength were observed, relocating the shifts of ferromagnetic-paramagnetic transitions to lower temperatures. On the other hand, effects of increased compressive strength were observed at higher concentrations of 𝑁𝑁𝑁𝑁 and 𝐶𝐶𝐶𝐶, relocating the shifts of ferromagnetic-paramagnetic and metal-insulator transitions to higher temperatures.

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Synthesis and Characterization of T12Ba2CaCu2O8 and T12Ba2Ca2Cu3O10

MRS Proceedings ◽

10.1557/proc-169-357 ◽

1989 ◽

Vol 169 ◽

Author(s):

Lauren E. H. McMills ◽

Shu Li ◽

Zhen Zhang ◽

Martha Greenblatt

Keyword(s):

Magnetic Susceptibility ◽

Powder Diffraction ◽

Single Phase ◽

Synthesis And Characterization ◽

Synthetic Method ◽

Superconducting Properties ◽

X Ray ◽

Preparation Conditions ◽

The Relationship

AbstractSingle-phase samples of T12Ba2CaCu2O8 and T12Ba2Ca2Cu3O10 have been prepared using a reliable and simple synthetic method. Samples were characterized by x-ray powder diffraction, magnetic susceptibility and four probe resistivity methods. The TcR=0 values for T12Ba2CaCu2O8 ranged from 100 to 105K, whereas those for T12Ba2Ca2Cu3O10 ranged from 96 to 107K. The relationship between the superconducting properties and the various preparation conditions are discussed.

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MAGNETIC AND STRUCTURAL PROPERTIES OF SOME ABa2Cu3O7−δ SUPERCONDUCTORS

International Journal of Modern Physics B ◽

10.1142/s0217979287001420 ◽

1987 ◽

Vol 01 (03n04) ◽

pp. 989-992 ◽

Cited By ~ 5

Author(s):

M.T. Causa ◽

S.M. Dutrús ◽

C. Fainstein ◽

G. Nieva ◽

H.R. Salva ◽

...

Keyword(s):

Magnetic Properties ◽

Electrical Resistivity ◽

Magnetic Susceptibility ◽

Specific Heat ◽

Powder Diffraction ◽

Magnetic Moments ◽

Superconducting Properties ◽

X Ray ◽

Structural Modifications

We report here normal and superconducting properties of ABa 2 Cu 3 O 7−δ (with A=Y, Gd, Dy, and Er) and of Fe doped YBa2Cu3O7−δ . Results from X-ray powder diffraction, electrical resistivity, magnetic susceptibility, ESR, and specific heat measurements are presented, leading to a characterization of the magnetic properties of these materials. The effect of structural modifications of the lattice on the superconducting properties and the relative insensitivity of Tc to the presence of magnetic moments is discussed.

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Darstellung und Charakterisierung des Silber(I,II,III)-oxidclathrates Ag7O8HCO3 / Synthesis and Characterization of the Silver(I,II,III) Oxide Clathrate Ag7O8HCO3

Zeitschrift für Naturforschung B ◽

10.1515/znb-2000-0913 ◽

2000 ◽

Vol 55 (9) ◽

pp. 882-886 ◽

Cited By ~ 10

Author(s):

Martin Jansen ◽

Sascha Vensky

Keyword(s):

Electron Microscopy ◽

Thermal Analysis ◽

Scanning Electron Microscopy ◽

Magnetic Susceptibility ◽

Solid State Nmr ◽

Synthesis And Characterization ◽

X Ray Diffraction ◽

X Ray ◽

Scanning Electron

The silver(I,II,III) oxide clathrate Ag7O8HCO3 was synthesized by anodic oxidation of silver(I) in a suspension of Ag2CO3 in an aqueous AgF solution. The title compound was characterized by single crystal X-ray diffraction (cubic, Fm3̄m, a = 9.8085(3) Å, Z = 4), scanning electron microscopy, thermal analysis, IR spectroscopy, 1H-solid state-NMR and measurement of the magnetic susceptibility

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Synthesis and Characterization of a Three-dimensional Porous Compound: [Cu(H2O)6][{Cu(H2O)2}2{Cu(H2O)4H4W12O42}] · 12H2O

Zeitschrift für Naturforschung B ◽

10.1515/znb-2008-0212 ◽

2008 ◽

Vol 63 (2) ◽

pp. 187-192 ◽

Cited By ~ 5

Author(s):

Chun-jing Zhang ◽

Ya-guang Chen ◽

Dong-mei Shi ◽

Hai-jun Pang

Keyword(s):

Aqueous Solution ◽

Magnetic Susceptibility ◽

Elemental Analysis ◽

3D Structure ◽

Three Dimensional ◽

Synthesis And Characterization ◽

X Ray Diffraction ◽

X Ray ◽

Vis Spectroscopy

A novel transition metal polyoxotungstate, [Cu(H2O)6][{Cu(H2O)2}2{Cu(H2O)4H4W12O42}] · 12H2O (1), has been synthesized in aqueous solution and characterized by single-crystal X-ray diffraction, elemental analysis, IR and UV/vis spectroscopy, and TG analysis. The paradodecatungstate anions [H2W12O42]10− are linked by CuO6 octahedra, forming a three-dimensional (3D) structure. The magnetic susceptibility of compound 1 in the temperature range 2 - 300 K shows the presence of antiferromagnetic interactions within the uniform Cu2・・・Cu3 chains

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Synthesis and Characterization of Low Density Bi-2223 Cuprates Superconductor Doped Eu2O3 Nanoparticles

Solid State Phenomena ◽

10.4028/www.scientific.net/ssp.317.131 ◽

2021 ◽

Vol 317 ◽

pp. 131-137

Author(s):

Suhaimi Nurbaisyatul Ermiza ◽

Azhan Hashim ◽

Azman Kasim ◽

Norazila Ibrahim ◽

Siti Fatimah Saipuddin

Keyword(s):

Solid State Reaction Method ◽

Synthesis And Characterization ◽

Crystallographic Structure ◽

Low Density ◽

Superconducting Properties ◽

X Ray Diffraction ◽

Conventional Solid State Reaction ◽

X Ray ◽

Resistivity Measurements

Bi1.6Pb0.4Sr2Ca2-xEuxCu3Oδ cuprates superconductor doped with Eu nanoparticles (x = 0.0000, 0.0025, 0.0200 and 0.0500) were synthesized through conventional solid state reaction method. Crystalline sucrose was added during pelletization and burn at 400°C for two hours to create low density sample. The effect of doping Eu2O3 nanoparticles on the structural and superconducting properties by means of critical temperature (Tc), critical current density (Jc), X-ray diffraction (XRD) together with Field Emission Scanning Electron Microscopy (FESEM) and Alternating Current Susceptibility (ACS) were studied. Based on XRD analyses, the crystallographic structure has shown slightly changed from tetragonal to orthorhombic. The amount of 2223 phase gradually decreased with the increment of Eu concentration which indicates that Eu nanoparticles substitution favours the growth of 2212 phases. The resistivity measurements show that the highest Tcvalue for doped samples found at 90 K for x = 0.0025. The FESEM images showed that the plate-like grains become smaller and distributed randomly without specific alignment due to the increment of Eu concentration.

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Karakterisasi Struktur Kristal dan Sifat Magnetik Magnet Stronsium Ferit Pasir Besi Batang Sukam Kabupaten Sijunjung Sumatera Barat

Prosiding SNFA (Seminar Nasional Fisika dan Aplikasinya) ◽

10.20961/prosidingsnfa.v1i0.4500 ◽

2017 ◽

Vol 1 ◽

pp. 38

Author(s):

Arif Budiman ◽

Dwi Puryanti ◽

Sri Mulyadi Dt. Basa ◽

Muhammad Rizki ◽

Helfi Syukriani

Keyword(s):

Crystal Structure ◽

Magnetic Properties ◽

Magnetic Susceptibility ◽

Single Phase ◽

Oxidation Process ◽

Strontium Ferrite ◽

X Ray Diffraction ◽

Hexagonal Crystal ◽

X Ray

Abstract: The synthesis and characterization of the crystal structure and magnetic properties of strontium ferrite magnets (SrO.6Fe2O3) has been done. Hematite (Fe2O3) is synthesized from iron sand of Batang Sukam Sijunjung Sumatera Barat through the oxidation process by temperature 700ºC for 3.0 hours. Strontium carbonate (SrCO3) was obtained from Merck product with a purity of more than 99%. Synthesis of strontium ferrite magnets are made through a process of solid-solid mixing and sintering at a temperature of 1000ºC for 3.0 hours. The results of characterization of X-ray diffraction indicates that it has formed a single phase strontium ferrite magnets with a hexagonal crystal structure. The result of measurement of the magnetic properties shows that an average magnetic susceptibility of strontium ferrite magnet is 266.7 × 10-8 m3 /kg. Keywords: strontium ferrite magnet, iron sand, crystal structure and magnetic susceptibility. Abstrak: Telah dilakukan sintesis dan karakterisasi struktur kristal dan sifat magnetik magnet stronsium ferit (SrO.6Fe2O3). Hematit (Fe2O3) disintesis daripasir besi Batang Sukam Kabupaten Sijunjung Sumatera Barat melalui proses oksidasi dengan temperatur 700ºC selama 3,0 jam. Stronsium karbonat (SrCO3) diperoleh dari produk Merck dengan kemurnian lebih dari 99 %. Sintesis magnet stronsium ferit dibuat melalui proses solid-solid mixing dan disintering pada suhu 1000ºC selama 3,0 jam. Hasil karakterisasi difraksi sinar-X menunjukkan bahwa telah terbentuk single phase magnet stronsium ferit dengan struktur kristal heksagonal. Hasil pengukuran sifat magnet menunjukkan bahwa magnet stronsium ferit memiliki suseptibilitas magnetik rata-rata 266,7 × 10-8 m3/kg. Kata Kunci: magnet stronsium ferit, pasir besi, struktur kristal dan suseptibilitas magnetik.

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Structural characterization of La2−xMxCuO4 (M = Sr,Ba) samples by synchrotron x-ray and neutron powder diffraction techniques

Journal of Materials Research ◽

10.1557/jmr.1988.1327 ◽

1988 ◽

Vol 3 (6) ◽

pp. 1327-1335 ◽

Cited By ~ 9

Author(s):

D. E. Cox ◽

S. C. Moss ◽

R. L. Meng ◽

P. H. Hor ◽

C. W. Chu

Keyword(s):

High Resolution ◽

Rietveld Refinement ◽

Powder Diffraction ◽

Structural Characterization ◽

Neutron Powder Diffraction ◽

Superconducting Properties ◽

X Ray Diffraction ◽

Neutron Data ◽

X Ray

High-resolution synchrotron x-ray powder diffraction studies on samples of La2−xMxCuO4 (M = Sr,Ba) prepared by standard ceramic techniques show that macroscopic compositional inhomogeneities may exist that are unlikely to be revealed by conventional x-ray diffraction methods. Rietveld refinement of neutron data collected at 200, 50, and 11 K from one such sample, nominally La1.8Sr0.2CuO4, gave satisfactory fits to a tetragonal structure of K2NiF4 type at all three temperatures. However, careful individual peak fits revealed that part of the sample transforms to orthorhombic between 200 and 50 K. It is suggested that this multiphase character has an important influence on the superconducting properties.

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Synthesis and Characterization of Inorganic Clathrate-II Materials

MRS Proceedings ◽

10.1557/proc-1044-u05-05 ◽

2007 ◽

Vol 1044 ◽

Cited By ~ 2

Author(s):

Matt Beekman ◽

George S. Nolas

Keyword(s):

Electrical Transport ◽

Structural Response ◽

Rietveld Analysis ◽

Synthesis And Characterization ◽

Type Ii ◽

X Ray Diffraction ◽

X Ray ◽

New Type ◽

Silicon And Germanium

AbstractPreliminary results from an investigation into the synthesis and characterization of silicon and germanium type II clathrates are reported. A series of NaxSi136 (0 < x < 24) clathrates was synthesized and characterized by powder X-ray diffraction and Rietveld analysis. The NaxSi136 lattice parameters are observed to first decrease, then increase with increasing Na content, indicating a non-monotonic structural response to Na filling. New type II Ge clathrate compositions Cs8Na16MyGe136-y (M = Cu, In) utilizing framework substitution are reported. Electrical transport measurements on a Cu substituted specimen indicate framework substitution modifies the transport properties of these materials. The potential type II clathrate phases possess for thermoelectric applications is discussed.

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