Phase diagram of ordered phases with L10 and L12 superlattices

1972 ◽  
Vol 15 (1) ◽  
pp. 138-140 ◽  
Author(s):  
N. S. Golosov ◽  
G. S. Golosova ◽  
L. E. Popov
Keyword(s):  
Phase Diagram ◽  
Ordered Phases

scholarly journals Quasi-1D XY antiferromagnet Sr2Ni(SeO3)2Cl2 at Sakai-Takahashi phase diagram

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
E. S. Kozlyakova ◽  
A. V. Moskin ◽  
P. S. Berdonosov ◽  
V. V. Gapontsev ◽  
S. V. Streltsov ◽  
...  
Keyword(s):  
Phase Diagram ◽  
Long Range ◽  
Density Functional ◽  
Uniaxial Anisotropy ◽  
Exchange Interactions ◽  
Spin Liquid ◽  
Functional Theory ◽  
One Dimensional ◽  
Ordered Phases ◽  
Experimental Findings

AbstractUniform quasi-one-dimensional integer spin compounds are of interest as a potential realization of the Haldane conjecture of a gapped spin liquid. This phase, however, has to compete with magnetic anisotropy and long-range ordered phases, the implementation of which depends on the ratio of interchain J′ and intrachain J exchange interactions and both uniaxial D and rhombic E single-ion anisotropies. Strontium nickel selenite chloride, Sr2Ni(SeO3)2Cl2, is a spin-1 chain system which passes through a correlations regime at Tmax ~ 12 K to long-range order at TN = 6 K. Under external magnetic field it experiences the sequence of spin-flop at Bc1 = 9.0 T and spin-flip transitions Bc2 = 23.7 T prior to full saturation at Bsat = 31.0 T. Density functional theory provides values of the main exchange interactions and uniaxial anisotropy which corroborate the experimental findings. The values of J′/J = 0.083 and D/J = 0.357 place this compound into a hitherto unoccupied sector of the Sakai-Takahashi phase diagram.

scholarly journals Bicritical Central Point of Ising Model Phase Diagram

2010 ◽  
Vol 2010 ◽  
pp. 1-5 ◽  
Author(s):  
Yahia Boughaleb ◽  
Mohammed Nouredine ◽  
Mohamed Snina ◽  
Rachid Nassif ◽  
Mohamed Bennai
Keyword(s):  
Phase Diagram ◽  
Order Parameter ◽  
Present Model ◽  
Central Point ◽  
Square Lattice ◽  
Ordered Structures ◽  
Ordered Phases ◽  
Algebraic Order ◽  
Pure Phases ◽  
Model Phase

We deal with a 2D half occupied square lattice with repulsive interactions between first and second neighboring particles. Despite the intensive studies of the present model the central point of the phase diagram for which the ratio of the two interaction strengths is still open. In the present paper we show, using standard Monte Carlo calculations, that the situation corresponds to a phase of mixed ordered structures quantified by an “algebraic” order parameter defined as the sum of densities of the existing ordered clusters. The introduced grandeur also characterizes the transitions towards the known pure ordered phases for the other values of as mentioned by the agreement of our results with those of the literature. The computation of the Cowley short range order parameter against suggests that the central point is bicritical and is a state to cross when passing between the two pure phases.

ITINERANT ANTIFERROMAGNETISM IN A FRUSTRATED LATTICE

1993 ◽  
Vol 07 (01n03) ◽  
pp. 1004-1007 ◽  
Author(s):  
C. LACROIX ◽  
M.D. NUNEZ-REGUEIRO ◽  
R. BALLOU
Keyword(s):  
Phase Diagram ◽  
Triangular Lattice ◽  
Exchange Interactions ◽  
Kondo Lattice ◽  
Magnetic Instability ◽  
Ordered Phases ◽  
Frustrated Lattice

Many different physical situations can be explained by the effect of frustration close to an antiferromagnetic-non magnetic instability. This is the case of several Cerium Kondo lattice compounds, as well as the RMn2 compounds. We propose that these systems can be described within a Blume-Capel model. The influence of frustration is studied analytically and numerically on a triangular lattice: new magnetic ordered phases are obtained in which magnetic and non-magnetic sites are present. The phase diagram is discussed for different values of the exchange interactions.

scholarly journals New insights on the crystalline forms in binary systems of n-alkanes: Characterization of the solid ordered phases in the phase diagram tricosane + pentacosane

1999 ◽  
Vol 14 (6) ◽  
pp. 2644-2654 ◽  
Author(s):  
F. Rajabalee ◽  
V. Métivaud ◽  
D. Mondieig ◽  
Y. Haget ◽  
M. A. Cuevas-Diarte
Keyword(s):  
Phase Diagram ◽  
Binary Systems ◽  
The Other ◽  
Structural Behavior ◽  
X Ray Diffraction ◽  
X Ray ◽  
Ordered Phases ◽  
Crystalline Forms ◽  
Mixed Samples

X-ray diffraction analyses of the pure components n-tricosane and n-pentacosane and of their binary mixed samples have enabled us to characterize the crystalline phases observed at “low temperature.” Contrary to what was announced in literature on the structural behavior of mixed samples in odd-odd binary systems with Δn = 2, the three domains are not all orthorhombic. This work has enabled us to show that two of the domains are, in fact, monoclinic (Aa, Z = 4), and the other one is orthorhombic (Pca21, Z = 4). The conclusions drawn in this work can easily be transposed to other binary systems of n-alkanes.

Magnetic Phase Diagram and Charge Transport in TmB12

2009 ◽  
Vol 152-153 ◽  
pp. 45-48 ◽  
Author(s):  
A.V. Bogach ◽  
S.V. Demishev ◽  
K. Flachbart ◽  
S. Gabani ◽  
V.V. Glushkov ◽  
...  
Keyword(s):  
Phase Diagram ◽  
Magnetic Susceptibility ◽  
Magnetic Phase ◽  
Magnetic Phase Diagram ◽  
Numerical Differentiation ◽  
Simple Relation ◽  
Paramagnetic State ◽  
Precision Measurements ◽  
Bulk Susceptibility ◽  
Ordered Phases

High precision measurements of magnetoresistance =f(T,H) and magnetization M(T,H) have been carried out on single crystals of rare earth dodecaboride TmB12 at temperatures 1.8–30 K in magnetic fields up to 80 kOe. The high accuracy measurements and precise temperature stabilization allowed us to perform numerical differentiation and analyze quantitatively a behavior of derivative d()/dH=f(T,H) and magnetic susceptibility (T,H)=dM/dH in paramagnetic and magnetically ordered phases of thulium dodecaboride. It was shown that negative magnetoresistance anomalies observed in present study in paramagnetic state of TmB12 can be consistently interpreted in frameworks of a simple relation between resistivity and magnetization - /M2 proposed by K. Yosida (Phys. Rev., 107, 396 (1957)). A local magnetic susceptibility loc(T,H)=(1/H(d(/)/dH))1/2 was deduced directly from the magnetoresistance measurements and compared with bulk susceptibility (T,H)=dM/dH results of the present study. Moreover, the susceptibility dependences loc(T,H) and (T,H) have been applied to analyze in detail the H-T magnetic phase diagram of TmB12.

Ordered phases and phase diagram of sulphur adsorbed on Ru(001)

1992 ◽  
Vol 271 (1-2) ◽  
pp. 1-20 ◽  
Author(s):  
R. Dennert ◽  
M. Sokolowski ◽  
H. Pfnür
Keyword(s):  
Phase Diagram ◽  
Ordered Phases

Ordering and Energetics of Hg Overlayers on Cu(O01)

1989 ◽  
Vol 159 ◽  
Author(s):  
C.W. Hutchings ◽  
P.A. Dowben ◽  
Y.J. Kime ◽  
W. Li ◽  
M. Karimi ◽  
...  
Keyword(s):  
Phase Diagram ◽  
Diffraction Data ◽  
Isosteric Heat ◽  
The Other ◽  
Square Lattice ◽  
Atom Beam ◽  
Ordered Phases ◽  
Beam Scattering ◽  
Two Phases ◽  
Beam Diffraction

ABSTRACTThe growth, ordering, and energetics of Hg overlayers on Cu(O01) have been studied using atom beam scattering, LEED and angle-resolved photoemission. Two stable ordered phases have been identified: one phase is a c(2↑2) and the other phase is a higher density square lattice which has a coincidence c(4↑4) structure. A phase diagram has been determined using LEED and atom beam diffraction data for surface temperatures between 180 and 330 K. ABS data suggest out that there is a narrow coexistance region between these two phases. The isosteric heat of adsorption has been determined as a function of coverage.

Electric Quadrupole Orders in f-Electron Systems on the fcc Lattice

2021 ◽  
Vol 1 ◽  
Keyword(s):  
Phase Diagram ◽  
Heavy Fermion ◽  
Electric Quadrupole ◽  
Electron Systems ◽  
Rich Phase ◽  
Partially Ordered ◽  
Fcc Lattice ◽  
Ordered Phases ◽  
Heavy Fermion Materials

We theoretically showed that electric quadrupoles in some heavy fermion materials exhibit a very rich phase diagram including unique partially-ordered phases stabilized by an interaction specific to these systems.

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