Multicomponent A-site ordered perovskite BiMn3(Fe0.25Ti0.75)4O12: High-pressure synthesis, crystal chemistry and magnetic behavior

2016 ◽  
Vol 234-235 ◽  
pp. 40-44 ◽  
Author(s):  
Gen Shimura ◽  
Ken Niwa ◽  
Yuichi Shirako ◽  
Shunsuke Muto ◽  
Keiji Kusaba ◽  
...  
Keyword(s):  
High Pressure ◽  
Crystal Chemistry ◽  
Magnetic Behavior ◽  
High Pressure Synthesis ◽  
Pressure Synthesis ◽  
A Site

High-Pressure Synthesis, Crystal Chemistry, and Ionic Conductivity of a Structural Polymorph of Li3BP2O8

2018 ◽  
Vol 57 (24) ◽  
pp. 15048-15050
Author(s):  
Eiichi Hirose ◽  
Kunimitsu Kataoka ◽  
Hiroshi Nagata ◽  
Junji Akimoto ◽  
Takuya Sasaki ◽  
...  
Keyword(s):  
High Pressure ◽  
Ionic Conductivity ◽  
Crystal Chemistry ◽  
High Pressure Synthesis ◽  
Pressure Synthesis

scholarly journals High-Pressure Synthesis, Crystal Structures, and Properties of A-Site Columnar-Ordered Quadruple Perovskites NaRMn2Ti4O12 with R = Sm, Eu, Gd, Dy, Ho, Y

2020 ◽  
Vol 59 (13) ◽  
pp. 9065-9076
Author(s):  
Ran Liu ◽  
Rebecca Scatena ◽  
Dmitry D. Khalyavin ◽  
Roger D. Johnson ◽  
Yoshiyuki Inaguma ◽  
...  
Keyword(s):  
High Pressure ◽  
Crystal Structures ◽  
High Pressure Synthesis ◽  
Structures And Properties ◽  
Pressure Synthesis ◽  
A Site

scholarly journals High-pressure synthesis and physical properties of A-site ordered perovskites

2014 ◽  
Vol 70 (a1) ◽  
pp. C755-C755
Author(s):  
Youwen Long
Keyword(s):  
High Pressure ◽  
Transition Metal ◽  
Physical Properties ◽  
Colossal Magnetoresistance ◽  
Research Work ◽  
Negative Thermal Expansion ◽  
Transition Metal Ions ◽  
High Pressure Synthesis ◽  
Pressure Synthesis ◽  
A Site

ABO3-type perovskite oxides exhibit a wide variety of interesting physical properties such as superconductivity, colossal magnetoresistance, multiferroic behavior etc. For a simple ABO3 perovskite, if three quarters of the A site is replaced by a transition metal A', then the so-called A-site ordered double perovskite with the chemical formula of AA'3B4O12 can form. Since both A' and B sites accommodate transition metal ions, in addition to conventional B-B interaction, the new A'-A' and/or A'-B interaction is possible to show up, giving rise to the presence of many novel physical properties. Here we will show our recent research work on the high-pressure synthesis of several A-site ordered perovskites as well as a series of interesting physical properties like temperature- and pressure-induced intermetallic charge transfer, negative thermal expansion, magnetoelectric coupling multiferroic and so on. [1-3]

scholarly journals High-Pressure Synthesis, Structures, and Properties of Trivalent A-Site-Ordered Quadruple Perovskites RMn7O12 (R = Sm, Eu, Gd, and Tb)

2018 ◽  
Vol 57 (10) ◽  
pp. 5987-5998 ◽  
Author(s):  
Lei Zhang ◽  
Noriki Terada ◽  
Roger D. Johnson ◽  
Dmitry D. Khalyavin ◽  
Pascal Manuel ◽  
...  
Keyword(s):  
High Pressure ◽  
High Pressure Synthesis ◽  
Structures And Properties ◽  
Pressure Synthesis ◽  
A Site

Stabilization of Superconductivity in Pure and C-Intercalated 1T-TaS2 Synthesised Under High Pressure

2010 ◽  
Vol 75 ◽  
pp. 173-180
Author(s):  
Amine Sellam ◽  
E. Giglioli ◽  
G. Rousse ◽  
Y. Klein ◽  
F. Porcher ◽  
...  
Keyword(s):  
High Pressure ◽  
Density Wave ◽  
Synthesis Method ◽  
Magnetic Behavior ◽  
Abrupt Onset ◽  
Lattice Parameters ◽  
Ex Situ ◽  
Synthesis Conditions ◽  
High Pressure Synthesis ◽  
Pressure Synthesis

In order to elucidate the origin of the interplay between charge density wave (CDW) and superconductivity in 1T-TaS2, we have synthesized powder samples of pure and C-intercalated 1T-CxTaS2 by means of a multi-anvil high-pressure synthesis method. We have found that single-phase samples are obtained in the 2-6 GPa range at 400 °C and for x=0-0.3. The structural, magnetic and transport properties of all samples have been investigated by means of neutron and x-ray diffraction, dc magnetization and dc electrical resistivity. For all x values including x=0, the data show that the CDW phase is suppressed concomitant to an abrupt onset of superconductivity, with Tc=3.2 K for x=0. The Tc value turns out to be weakly dependent on x, with a maximum Tc=3.8 K for x=0.2. This onset is accompanied by a crossover of magnetic behavior from paramagnetic Pauli-like to paramagnetic Curie-Weiss-like with effective moment  1.2 B/Ta, which suggests that a ionic picture is suitable for the superconducting phase, but not for the CDW phase. The analysis of the dependence of the a and c lattice parameters upon x as well as upon the synthesis conditions shows that the onset of superconductivity is mainly ascribed to unusual changes of the unit cell induced by the high-pressure synthesis. Specifically, the ex-situ lattice parameters exhibit a significantly larger c-axis parameter and a shrinking of the a-axis parameter stabilized by the high-pressure synthesis route. We argue that the above suppression of the CDW phase is induced by a broadening of the relevant 5d(t2g) band which stabilizes the metallic and superconducting phases. This scenario suggests that the strength of the electronic correlations are the main control parameter of the CDW-superconductivity competition in 1T-TaS2.

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