scholarly journals Development of magnetism in the solid solution of Ce1−xPrxAlGe : From magnetic topology to spin glass

2020 ◽  
Vol 101 (21) ◽  
Author(s):  
Pascal Puphal ◽  
Sarah Krebber ◽  
Emmanuelle Suard ◽  
Robert Cubitt ◽  
Chennan Wang ◽  
...  
1995 ◽  
Vol 52 (17) ◽  
pp. 12829-12832 ◽  
Author(s):  
J. Tang ◽  
W. Zhao ◽  
C. J. O’Connor ◽  
C. Tao ◽  
M. Zhao ◽  
...  

1983 ◽  
Vol 31-34 ◽  
pp. 1401-1403 ◽  
Author(s):  
J. García ◽  
J.A. Rojo ◽  
R. Navarro ◽  
J. Bartolomé ◽  
D. González
Keyword(s):  

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
T. J. Bullard ◽  
M. A. Susner ◽  
K. M. Taddei ◽  
J. A. Brant ◽  
T. J. Haugan

AbstractCuAl2O4 is a ternary oxide spinel with Cu2+ ions ($$s=1/2$$ s = 1 / 2 ) primarily populating the A-site diamond sublattice. The compound is reported to display evidence of spin glass behavior but possess a non-frozen magnetic ground state below the transition temperature. On the other hand, the spinel CuGa2O4 displays spin glass behavior at ~ 2.5 K with Cu2+ ions more readily tending to the B-site pyrochlore sublattice. Therefore, we investigate the magnetic and structural properties of the solid solution CuAl2(1-x)Ga2xO4 examining the evolution of the magnetic behavior as Al3+ is replaced with a much larger Ga3+ ion. Our results show that the Cu2+ ions tend to migrate from tetrahedral to octahedral sites as the Ga3+ ion concentration increases, resulting in a concomitant change in the glassy magnetic properties of the solution. Results indicate glassy behavior for much of the solution with a general trend towards decreasing magnetic frustration as the Cu2+ ion shifts to the B-site. However, the $$x=0.1$$ x = 0.1 and 0.2 members of the system do not show glassy behavior down to our measurement limit (1.9 K) suggesting a delayed spin glass transition. We suggest that these two members are additional candidates for investigation to access highly frustrated exotic quantum states.


2017 ◽  
Vol 5 (1) ◽  
pp. 166-175 ◽  
Author(s):  
T. Scholz ◽  
R. Dronskowski

The experimental and theoretical study of the solid solution GexFe4−xNy (0 ≤ x ≤ 1) reveals a structural transition from the cubic to the tetragonal system as well as a magnetic transition from a ferromagnet to a spin glass accompanying the increasing germanium concentration.


2017 ◽  
Vol 53 (4) ◽  
pp. 2405-2412 ◽  
Author(s):  
C. Nayek ◽  
M. K. Ray ◽  
A. Pal ◽  
I. M. Obaidat ◽  
P. Murugavel

1986 ◽  
Vol 59 (3-4) ◽  
pp. 221-234 ◽  
Author(s):  
R. Navarro ◽  
J.A. Rojo ◽  
J. García ◽  
D. González ◽  
J. Bartolomé ◽  
...  

Author(s):  
L.E. Murr ◽  
J.S. Dunning ◽  
S. Shankar

Aluminum additions to conventional 18Cr-8Ni austenitic stainless steel compositions impart excellent resistance to high sulfur environments. However, problems are typically encountered with aluminum additions above about 1% due to embrittlement caused by aluminum in solid solution and the precipitation of NiAl. Consequently, little use has been made of aluminum alloy additions to stainless steels for use in sulfur or H2S environments in the chemical industry, energy conversion or generation, and mineral processing, for example.A research program at the Albany Research Center has concentrated on the development of a wrought alloy composition with as low a chromium content as possible, with the idea of developing a low-chromium substitute for 310 stainless steel (25Cr-20Ni) which is often used in high-sulfur environments. On the basis of workability and microstructural studies involving optical metallography on 100g button ingots soaked at 700°C and air-cooled, a low-alloy composition Fe-12Cr-5Ni-4Al (in wt %) was selected for scale up and property evaluation.


Author(s):  
A. Christou ◽  
J. V. Foltz ◽  
N. Brown

In general, all BCC transition metals have been observed to twin under appropriate conditions. At the present time various experimental reports of solid solution effects on BCC metals have been made. Indications are that solid solution effects are important in the formation of twins. The formation of twins in metals and alloys may be explained in terms of dislocation mechanisms. It has been suggested that twins are nucleated by the achievement of local stress-concentration of the order of 15 to 45 times the applied stress. Prietner and Leslie have found that twins in BCC metals are nucleated at intersections of (110) and (112) or (112) and (112) type of planes.In this paper, observations are reported of a transmission microscope study of the iron manganese series under conditions in which twins both were and were not formed. High strain rates produced by shock loading provided the appropriate deformation conditions. The workhardening mechanisms of one alloy (Fe - 7.37 wt% Mn) were studied in detail.


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