Tunable magnetic pole inversion in multiferroic BiFeO3–DyFeO3 solid solution

2017 ◽  
Vol 5 (16) ◽  
pp. 4063-4067 ◽  
Author(s):  
Jiangtao Wu ◽  
Zuzhen Liao ◽  
Ting Sun ◽  
Lun-Wei Su ◽  
Jian Bi ◽  
...  
Keyword(s):  
Solid Solution ◽  
Composition Range ◽  
Magnetic Pole ◽  
Wide Composition Range ◽  
Multiferroic Bifeo ◽  
Multiferroic Bifeo3 ◽  
Magnetic Ion

We report an unusual magnetic pole inversion behaviour in multiferroic BiFeO3–xDyFeO3 solid solution, which can be tuned by varying the concentration of the magnetic ion Dy in the solid solution. It is found that the temperature-induced magnetic pole inversion occurs in a wide composition range (x = 0.14–0.90). Moreover, multiple magnetic pole inversions are observed in the solid solution compounds of high Dy-concentrations.

scholarly journals Solid-Solution Alloy Nanoparticles of the Immiscible Iridium-Copper System with a Wide Composition Range for Enhanced Electrocatalytic Applications

2018 ◽  
Vol 130 (17) ◽  
pp. 4595-4599 ◽  
Author(s):  
Fenglong Wang ◽  
Kohei Kusada ◽  
Dongshuang Wu ◽  
Tomokazu Yamamoto ◽  
Takaaki Toriyama ◽  
...  
Keyword(s):  
Solid Solution ◽  
Composition Range ◽  
Solid Solution Alloy ◽  
Alloy Nanoparticles ◽  
Wide Composition Range

Bcc / B2 phase equilibria and phase transformation from B2 to β’ in refractory Nb-X(Pd, Rh, Ir)-Al

MRS Advances ◽  
2017 ◽  
Vol 2 (25) ◽  
pp. 1335-1340
Author(s):  
T. Yamanouchi ◽  
S. Miura ◽  
M. Ohno ◽  
K. Ikeda
Keyword(s):  
Solid Solution ◽  
Phase Transformation ◽  
Surface Layer ◽  
Phase Field ◽  
Composition Range ◽  
Eutectic Temperature ◽  
Two Phase ◽  
Wide Composition Range ◽  
B2 Phase ◽  
Bcc Phase

ABSTRACTFor the improvement of oxidation resistance of Nb-based alloys, PdAl-B2 is expected as Al reservoir for Al2O3 surface layer because it is in equilibrium with Nbss (bcc) phase. However, PdAl forms cracks during casting caused by B2 -> β’ transformation. To suppress B2 -> β’ transformation, Rh, Ru and Ir were chosen as additive elements. It is found that bcc / B2 two-phase field in Nb-Pd-Ir-Al system is limited to be small fraction of Ir, while (Pd,Rh)Al-B2 is in equilibrium with bcc solid solution in a wide composition range and addition of Rh prevents occurrence of B2 -> β’ transformation. Composition range of (Pd,Ru)Al-B2 in equilibrium with bcc phase is wider than (Pd,Ir)Al-B2 but narrower than (Pd,Rh)Al-B2. Rh and Ru addition are also beneficial for improving eutectic temperature of Nb-bcc / B2 aluminide two-phase alloys.

scholarly journals Preparation and characterization of WMo solid solution nanopowders with a wide composition range

2020 ◽  
Vol 823 ◽  
pp. 153760 ◽  
Author(s):  
Qiuyu Chen ◽  
Shuhua Liang ◽  
Junlu Zhang ◽  
Xiaochuan Zhang ◽  
Chan Wang ◽  
...  
Keyword(s):  
Solid Solution ◽  
Composition Range ◽  
Wide Composition Range

Electrical Conductivity of Zirconia-Mn Oxide Mixture

1998 ◽  
Vol 548 ◽  
Author(s):  
J. H. Kim ◽  
G. M. Choi
Keyword(s):  
Activation Energy ◽  
Solid Solution ◽  
Electrical Conductivity ◽  
Composition Range ◽  
Two Phase ◽  
Oxide Mixture ◽  
Wide Composition Range ◽  
Hysteresis Behavior ◽  
Mn Oxide ◽  
Form Solid Solution

ABSTRACTMn2O3 was added to YSZ (8 mol% yttria- doped zirconia) either to form solid solution or two-phase (Mn2O3 and Mn2O3 doped-YSZ) mixed-conducting oxide. The electrical conductivity was measured between 600 and 1000°C in air using 4-probe d.c. method in a wide composition range to determine composition-dependent conductivity. Up to 12 mol% MnO1.5 addition, the conductivity decreases and the activation energy increases. With further increase of MnO1.5 content, the conductivity of composite begins to increase slowly and then increases rapidly after 30 mol% due to the interconnected, conductive Mn2O3 particles. Above 35 Mol% MnO1.5 content, the activation energy is nearly the same as that of Mn2O3. Hysteresis behavior shown in the conductivity of composite also provides the evidence of percolation by MnO1.5.

Phase Equilibrium between B2 Aluminide NiAl and Nb-Mo bcc Solid Solution Phase

2014 ◽  
Vol 783-786 ◽  
pp. 1171-1175 ◽  
Author(s):  
Seiji Miura ◽  
Yoshihito Sekito ◽  
Takuya Okawa ◽  
Takuya Yamanouchi ◽  
Tetsuo Mohri
Keyword(s):  
Phase Diagram ◽  
Solid Solution ◽  
Surface Layer ◽  
Composition Range ◽  
Solution Phase ◽  
Solid Solution Phase ◽  
Wide Composition Range ◽  
Nial Phase ◽  
Bcc Phase ◽  
Cracking Tendency

In order to understand the composition of the Nb-Mo bcc phase suitable to introduce B2-NiAl phase for the improvement of oxidation resistance as an Al reservoir layer for maintaining Al2O3 surface layer, a NiAl-Nb-Mo section of the quaternary Al-Nb-Ni-Mo phase diagram is studied. It is found that the ternary τ2 phase appears in wide composition range of alloys, both the hardness and cracking tendency decreases with increasing the Mo concentration of the alloys.

Solid-Solution Alloy Nanoparticles of the Immiscible Iridium-Copper System with a Wide Composition Range for Enhanced Electrocatalytic Applications

2018 ◽  
Vol 57 (17) ◽  
pp. 4505-4509 ◽  
Author(s):  
Fenglong Wang ◽  
Kohei Kusada ◽  
Dongshuang Wu ◽  
Tomokazu Yamamoto ◽  
Takaaki Toriyama ◽  
...  
Keyword(s):  
Solid Solution ◽  
Composition Range ◽  
Solid Solution Alloy ◽  
Alloy Nanoparticles ◽  
Wide Composition Range

Microstructure and Friction of Ion Beam Induced Amorphous Ti-Pd Alloys

1985 ◽  
Vol 55 ◽  
Author(s):  
J-P. Hirvonen ◽  
M. Nastasi ◽  
J. R. Phillips ◽  
J. W. Mayer
Keyword(s):  
Solid Solution ◽  
Friction Coefficient ◽  
Composition Range ◽  
Ion Beam ◽  
Amorphous Region ◽  
Transmission Electron ◽  
Solid Solution Region ◽  
Friction Measurements ◽  
Solution Region ◽  
High Equilibrium

ABSTRACTMultilayered samples of Ti-Pd with linearly varying compositions were irradiated by Xe ions at 600 keV. The induced microstructures were studied by using transmission electron microscopy and Rutherford backscattering. Mixing was found to be complete over the entire composition range, resulting in amorphous or amorphous plus crystalline structures except at the palladium-rich end, where a crystalline Pd-Ti solid solution was obtained. This is consistent with the high equilibrium solubility of Ti in Pd. In addition, significant coarsening of the microstructure caused by irradiation was found in this solid solution region.Friction measurements were carried out in air and water by using a polytetrafluoroethylene pin as a counterpart. In air the friction coefficient was independent of composition and microstructure after about 2000 passes. In water, however, after 600 passes the friction coefficient reached a steady-state value with a pronounced minimum over the amorphous region. This property was unchanged throughout the remaining 10000 passes.

scholarly journals Test of Anderson-Stuart model in sodium silicate glasses and the general Arrhenian conductivity rule in wide composition range

Cerâmica ◽  
2006 ◽  
Vol 52 (321) ◽  
pp. 22-30 ◽  
Author(s):  
M. L. F. Nascimento ◽  
E. Nascimento ◽  
W. M. Pontuschka ◽  
M. Matsuoka ◽  
S. Watanabe
Keyword(s):  
Activation Energy ◽  
Ionic Conductivity ◽  
Sodium Silicate ◽  
Composition Range ◽  
Absolute Temperature ◽  
Alkali Concentration ◽  
Relative Dielectric Permittivity ◽  
Silicate System ◽  
Wide Composition Range ◽  
Sigma E

We collected and analyzed literature data on ionic conductivity sigma and activation energy E A in the binary sodium silicate system in a wide composition range. The Anderson and Stuart model has been considered to describe the decreasing tendency of activation energy E A with alkali concentration in this system. In this analysis were considered experimental parameters, such as shear modulus G and relative dielectric permittivity epsilon. A general conductivity rule is found in 194 of 205 glasses, when one plots log sigma vs. E A/kB T, where kB is the Boltzmann constant and T is the absolute temperature. This fact means that the arrhenian relation has universal uniqueness of form sigma = sigma (E A,T) in wide Na2O composition range. The results also show that there is strong correlation by more than 19 orders of magnitude on conductivity with E A/kBT. An explanation for this behavior links ionic conductivity and microscopic structure. The problem of phase separation in this system is also considered.

Coexistence of room temperature ferroelectricity and ferrimagnetism in multiferroic BiFeO3–Bi0.5Na0.5TiO3 solid solution

2011 ◽  
Vol 509 (32) ◽  
pp. 8144-8148 ◽  
Author(s):  
Z.M. Tian ◽  
C.H. Wang ◽  
S.L. Yuan ◽  
M.S. Wu ◽  
Z.Z. Ma ◽  
...  
Keyword(s):  
Solid Solution ◽  
Room Temperature ◽  
Multiferroic Bifeo3
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