High-Pressure and High-Temperature Synthesis of a Novel Perovskite Compound: Magnetic and Electric Properties of the Rhodium Oxide SrRhO3

2002 ◽  
Vol 718 ◽  
Author(s):  
K. Yamaura ◽  
D.P. Young ◽  
E. Takayama-Muromachi
Keyword(s):  
High Pressure ◽  
Electrical Resistivity ◽  
Magnetic Susceptibility ◽  
Oxygen Vacancies ◽  
X Ray Diffraction ◽  
X Ray ◽  
High Temperature Synthesis ◽  
Liquid Behavior ◽  
Rhodium Oxide ◽  
Polycrystalline Form

AbstractNovel perovskite compound SrRhO3 was synthesized in a polycrystalline form by high-pressure technique at 6 GPa and 1500°C, followed by measurements of magnetic susceptibility, electrical resistivity, thermopower, and specific heat. Powder x-ray diffraction study found the slightly distorted perovskite structure, GdFeO3-type, to be likely to SrRhO3; space group was Pnma and lattice parameters were α = 5.5394(2) Å, b = 7.8539 (3) Å, and c = 5.5666(2) A. Oxygen vacancies in the perovskite were quantitatively investigated by thermogravimetric analysis and then found either absent or at least insignificant. The title compound shows a Fermi-liquid behavior in its electrical resistivity. The magnetic susceptibility is large [χ(300) ∼1.1x10-3 emu/mol-Rh], and the characteristics seem to be intermediate between enhanced Pauli- and Curie-Weiss-type paramagnetism.

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.

Characterizing high-pressure compressed C60 whiskers and C60 powder

2003 ◽  
Vol 18 (1) ◽  
pp. 166-172 ◽  
Author(s):  
Kun'ichi Miyazawa ◽  
Minoru Akaishi ◽  
Yusuke Kuwasaki ◽  
Tadatomo Suga
Keyword(s):  
High Pressure ◽  
Electrical Resistivity ◽  
Electrical Properties ◽  
Vickers Hardness ◽  
High Density ◽  
X Ray Diffraction ◽  
X Ray ◽  
Density Of Dislocations ◽  
Mechanical And Electrical Properties

Structural, mechanical, and electrical properties were examined for C60 whiskers, high-pressure sintered C60 whiskers, and C60 powder. A high density of dislocations was observed in the C60 whiskers, and the C60 whiskers with diameters of a few hundred nanometers were found to be flexible. Although both the specimens sintered under the same condition showed similar surface x-ray diffraction profiles with a strong accumulation of [110]tr orientation, the sintered C60 whiskers showed a higher micro-Vickers hardness and an electrical resistivity four orders of magnitude lower than that of the sintered C60 powder.

A Cr(IV) based 1212-type cuprate

2002 ◽  
Vol 755 ◽  
Author(s):  
Rocío Ruiz-Bustos ◽  
Myriam H. Aguirre ◽  
M.Á. Alario-Franco
Keyword(s):  
High Pressure ◽  
Magnetic Susceptibility ◽  
High Temperature ◽  
Antiferromagnetic Transition ◽  
X Ray Diffraction ◽  
X Ray ◽  
Charge Reservoir Layer ◽  
Prepared Material ◽  
New Material

ABSTRACTBy means of high pressure and high temperature we have prepared a new material similar to the classic YBa2Cu3O7 (Ybacuo) superconductor but having chromium in the so-called charge reservoir layer: CrSr2YCu2O8. It has been characterised by different techniques such as X-ray diffraction, TEM, ED, EDS, and magnetic susceptibility. The new material is isostructural with the Ru equivalent compound (RuSr2YCu2O8). An antiferromagnetic transition is observed on cooling below 130 K. The as prepared material is not superconducting down to 4 K.

Thermoelectric properties of InxPbxCo4Sb12 prepared by HPHT

2016 ◽  
Vol 09 (01) ◽  
pp. 1650008 ◽  
Author(s):  
Le Deng ◽  
Li Bin Wang ◽  
Jie Ming Qin ◽  
Xiao Peng Jia ◽  
Hong An Ma
Keyword(s):  
Thermal Conductivity ◽  
High Pressure ◽  
Electrical Resistivity ◽  
Seebeck Coefficient ◽  
Thermoelectric Properties ◽  
Microprobe Analysis ◽  
Electron Microprobe Analysis ◽  
Substantial Reduction ◽  
X Ray Diffraction ◽  
X Ray

We prepared InxPbxCo4Sb[Formula: see text] by high-pressure and high-temperature (HPHT) method. Samples were characterized by X-ray diffraction (XRD), electron microprobe analysis and thermoelectric properties measurements. The Seebeck coefficient, electrical resistivity and thermal conductivity of InxPbxCo4Sb[Formula: see text] samples were all performed in the temperature range of 323–723[Formula: see text]K. With the increasing synthetic pressure, the Seebeck coefficient of In[Formula: see text]Pb[Formula: see text]Co4Sb[Formula: see text] samples, which synthesized between 1.5 GPa–2.3 GPa, showed an obvious increase while the thermal conductivity exhibited a substantial reduction.

ELECTRIC, MAGNETIC AND STRUCTURAL PROPERTIES OF HIGH-Tc OXYDIC SUPERCONDUCTORS Y2Ba4CanCun+6O2n+14

1996 ◽  
Vol 10 (25) ◽  
pp. 1261-1266
Author(s):  
L. HOMORODEAN ◽  
I. POP ◽  
I. BURDA ◽  
M. ANDRECUT ◽  
G. BORODI
Keyword(s):  
Electrical Resistivity ◽  
Magnetic Susceptibility ◽  
Diffraction Method ◽  
Linear Increase ◽  
Thermal Variation ◽  
X Ray Diffraction ◽  
High Tc ◽  
X Ray ◽  
Diamagnetic Transition ◽  
Zero Baseline

A new series of oxydic superconductors, Y 2 Ba 4 Ca n Cu n+6 O 2n+14, was synthesized. By X-ray diffraction method was pointed out that the samples are 123 phase superconductors. The temperature dependence of the electrical resistivity pointed out the zero-baseline, a linear increase and a jump. The thermal variation of the magnetic susceptibility exhibits the diamagnetic transition i.e. Tc(χ=0).

X-ray diffraction, Mössbauer spectroscopic and electrical resistivity studies on Lohawat meteorite under high-pressure up to 9 GPa

Geochemistry ◽  
2013 ◽  
Vol 73 (2) ◽  
pp. 197-203 ◽  
Author(s):  
Usha Chandra ◽  
G. Parthasarathy ◽  
N.V. Chandra Shekar ◽  
P.Ch. Sahu
Keyword(s):  
High Pressure ◽  
Electrical Resistivity ◽  
X Ray Diffraction ◽  
X Ray

scholarly journals Synthesis and superconductivity of new TiNiSi-type equiatomic germanide ThIrGe

2021 ◽  
Author(s):  
Guorui Xiao ◽  
Qinqing Zhu ◽  
Yanwei Cui ◽  
Bin Liu ◽  
Jifeng Wu ◽  
...  
Keyword(s):  
Electron Microscopy ◽  
Transmission Electron Microscopy ◽  
Electrical Resistivity ◽  
Magnetic Susceptibility ◽  
Structural Refinement ◽  
X Ray Diffraction ◽  
X Ray ◽  
Transmission Electron ◽  
Thermodynamic Measurements

A new germanide ThIrGe has been synthesized and characterized by x-ray diffraction, transmission electron microscopy, electrical resistivity, magnetic susceptibility and thermodynamic measurements. The structural refinement shows that, in contrast to...

scholarly journals Self-Propagating High-Temperature Synthesis of Chromium Substituted Lanthanide – Barium – Copper Oxides, LnBa2Cu3-xCrxO7-y (Ln = Y; La; Nd; Sm and Yb)

2017 ◽  
Vol 4 (2) ◽  
pp. 73 ◽  
Author(s):  
Maxim V. Kuznetsov ◽  
Ivan P. Parkin ◽  
Yuri G. Morozov ◽  
Alexander G. Merzhanov
Keyword(s):  
Magnetic Susceptibility ◽  
High Temperature ◽  
Sodium Perchlorate ◽  
Earth Metal ◽  
X Ray Diffraction ◽  
Temperature Synthesis ◽  
X Ray ◽  
High Temperature Synthesis ◽  
Barium Copper ◽  
Chromium Substitution

<p>A series of MBa<sub>2</sub>Cu<sub>3-x</sub>CrxO<sub>7-y</sub> (M = Y; La; Nd; Sm and Yb; <em>x </em>= 0, 0.05, 0.15, 0.25) materials were synthesized in air by self-propagating high-temperature synthesis (SHS) involving reaction of stoichiometric mixtures of rare-earth metal (III) oxide, barium peroxide, copper metal, chromium (III) oxide and sodium perchlorate. All the SHS processes were followed by sintering in oxygen at 950 °C for 2h. The products were characterized by SEM, X-ray powder diffraction, UV, superconductive transition temperatures (T<sub>c</sub>) and magnetic susceptibility (χ) measurements. X-ray diffraction data showed that single phase orthorhombic (or tetragonal for M = Nd) materials were produced. All series of materials showed a systematic increase in lattice parameters and unit cell volume with chromium content (M = Y: <em>x </em>= 0, <em>V </em>= 174.25 Å3; <em>x </em>= 0.25, <em>V </em>= 175.10 Å3). Thermal stability of all the SHS prepared materials increased with <em>x</em>. Oxygen content of all the samples increased with <em>x</em>, but did not exceed 7.0. Superconductivity transition temperature decreased with chromium substitution in all systems (98-77 K). Magnetic susceptibility decreased with chromium substitution.</p>

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