Design of anti-site disorder for tunable spontaneous exchange bias: Mn-Ni-Al alloys as a case

2018 ◽  
Vol 113 (21) ◽  
pp. 212402 ◽  
Author(s):  
X. Wang ◽  
M. M. Li ◽  
J. Li ◽  
J. Y. Yang ◽  
L. Ma ◽  
...  
Keyword(s):  
Exchange Bias ◽  
Al Alloys ◽  
Site Disorder

Engineering of exchange bias byA-site disorder in Pr1−xEuxMnO3

2012 ◽  
Vol 45 (21) ◽  
pp. 215001 ◽  
Author(s):  
A Karmakar ◽  
S Majumdar ◽  
S Giri
Keyword(s):  
Exchange Bias ◽  
Site Disorder

Thermoelastic martensitic transformation in ferromagnetic Ni–Fe–Al alloys: Effect of site disorder

2006 ◽  
Vol 89 (9) ◽  
pp. 093119 ◽  
Author(s):  
S. N. Kaul ◽  
B. Annie D’ Santhoshini ◽  
A. C. Abhyankar ◽  
L. Fernández Barquín ◽  
Paul Henry
Keyword(s):  
Martensitic Transformation ◽  
Al Alloys ◽  
Thermoelastic Martensitic Transformation ◽  
Site Disorder

scholarly journals B-site disorder driven multiple-magnetic phases: Griffiths phase, re-entrant cluster glass, and exchange bias in Pr2CoFeO6

2019 ◽  
Vol 114 (25) ◽  
pp. 252403 ◽  
Author(s):  
Arkadeb Pal ◽  
Prajyoti Singh ◽  
V. K. Gangwar ◽  
Surajit Ghosh ◽  
P. Prakash ◽  
...  
Keyword(s):  
Exchange Bias ◽  
Griffiths Phase ◽  
Magnetic Phases ◽  
Site Disorder

Observation of faint contrast at planar faults in alloys

1978 ◽  
Vol 36 (1) ◽  
pp. 340-341
Author(s):  
K. Kuroda ◽  
Y. Tomokiyo ◽  
T. Kumano ◽  
T. Eguchi
Keyword(s):  
Reciprocal Lattice ◽  
Beam Theory ◽  
Al Alloys ◽  
Small Displacement ◽  
Electron Microscopic ◽  
Lattice Vector ◽  
Fringe Contrast ◽  
Planar Fault ◽  
Lattice Displacement ◽  
The Many

The contrast in electron microscopic images of planar faults in a crystal is characterized by a phase factor , where is the reciprocal lattice vector of the operating reflection, and the lattice displacement due to the fault under consideration. Within the two-beam theory a planar fault with an integer value of is invisible, but a detectable contrast is expected when the many-beam dynamical effect is not negligibly small. A weak fringe contrast is also expected when differs slightly from an integer owing to an additional small displacement of the lattice across the fault. These faint contrasts are termed as many-beam contrasts in the former case, and as ε fringe contrasts in the latter. In the present work stacking faults in Cu-Al alloys and antiphase boundaries (APB) in CuZn, FeCo and Fe-Al alloys were observed under such conditions as mentioned above, and the results were compared with the image profiles of the faults calculated in the systematic ten-beam approximation.

Microstructure of an extruded rapidly solidified Al-8Fe-2Mo alloy

1986 ◽  
Vol 44 ◽  
pp. 548-549
Author(s):  
W. T. Donlon ◽  
J. E. Allison ◽  
S. Shinozaki
Keyword(s):  
Electron Microscopy ◽  
Automotive Industry ◽  
Fuel Economy ◽  
High Strength ◽  
Al Alloys ◽  
Light Weight ◽  
Thin Sections ◽  
Strength And Durability ◽  
Rapidly Solidified ◽  
Whitney Aircraft

Light weight materials which possess high strength and durability are being utilized by the automotive industry to increase fuel economy. Rapidly solidified (RS) Al alloys are currently being extensively studied for this purpose. In this investigation the microstructure of an extruded Al-8Fe-2Mo alloy, produced by Pratt & Whitney Aircraft, Goverment Products Div. was examined in a JE0L 2000FX AEM. Both electropolished thin sections, and extraction replicas were examined to characterize this material. The consolidation procedure for producing this material included a 9:1 extrusion at 340°C followed by a 16:1 extrusion at 400°C, utilizing RS powders which have also been characterized utilizing electron microscopy.

THE FORMATION OF VACANCIES IN ORDERED Fe-Al ALLOYS WITH B2 STRUCTURE

1977 ◽  
Vol 38 (C7) ◽  
pp. C7-364-C7-364 ◽  
Author(s):  
D. PARIS ◽  
P. LESBATS
Keyword(s):  
Al Alloys ◽  
B2 Structure

MÖSSBAUER STUDY ON RECOVERY OF COLD-WORKED Fe-Al ALLOYS

1979 ◽  
Vol 40 (C2) ◽  
pp. C2-611-C2-612 ◽  
Author(s):  
K. Oki ◽  
S. Towata ◽  
M. Tamiya ◽  
T. Eguchi
Keyword(s):  
Al Alloys ◽  
Mössbauer Study ◽  
Cold Worked

Rapid Crystallization and Kinetic Freezing of Site-Disorder in the Lithium Superionic Argyrodite Li6PS5Br

2019 ◽  
Author(s):  
Ajay Gautam ◽  
Marcel Sadowski ◽  
Nils Prinz ◽  
Henrik Eickhoff ◽  
Nicolo Minafra ◽  
...  
Keyword(s):  
Elevated Temperatures ◽  
Synthesis Method ◽  
Reaction Times ◽  
Ionic Conductivities ◽  
Ionic Transport ◽  
High Energy ◽  
Superionic Conductors ◽  
Rapid Crystallization ◽  
Site Disorder ◽  
Fast Cooling

<p>Lithium argyrodite superionic conductors are currently being investigated as solid electrolytes for all-solid-state batteries. Recently, in the lithium argyrodite Li<sub>6</sub>PS<sub>5</sub>X (X = Cl, Br, I), a site-disorder between the anionsS<sup>2–</sup>and X<sup>–</sup>has been observed, which strongly affects the ionic transport and appears to be a function of the halide present. In this work, we show how such disorder in Li<sub>6</sub>PS<sub>5</sub>Br can be engineered <i>via</i>the synthesis method. By comparing fast cooling (<i>i.e. </i>quenching) to more slowly cooled samples, we find that anion site-disorder is higher at elevated temperatures, and that fast cooling can be used to kinetically trap the desired disorder, leading to higher ionic conductivities as shown by impedance spectroscopy in combination with <i>ab-initio</i>molecular dynamics. Furthermore, we observe that after milling, a crystalline lithium argyrodite can be obtained within one minute of heat treatment. This rapid crystallization highlights the reactive nature of mechanical milling and shows that long reaction times with high energy consumption are not needed in this class of materials. The fact that site-disorder induced <i>via</i>quenching is beneficial for ionic transport provides an additional approach for the optimization and design of lithium superionic conductors.</p>

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