scholarly journals Thermal and Quantum Melting Phase Diagrams for a Magnetic-Field-Induced Wigner Solid

2020 ◽  
Vol 125 (3) ◽  
Author(s):  
Meng K. Ma ◽  
K. A. Villegas Rosales ◽  
H. Deng ◽  
Y. J. Chung ◽  
L. N. Pfeiffer ◽  
...  
Keyword(s):  
Magnetic Field ◽  
Phase Diagrams ◽  
Wigner Solid ◽  
Quantum Melting

THE GROUND-STATE PHASE DIAGRAMS OF THE SPIN-2 ISING MODEL

2007 ◽  
Vol 21 (31) ◽  
pp. 5265-5274 ◽  
Author(s):  
AHMET ERDİNÇ
Keyword(s):  
Magnetic Field ◽  
Ising Model ◽  
External Magnetic Field ◽  
Phase Diagrams ◽  
Crystal Field ◽  
Ground State ◽  
Exchange Interactions ◽  
Nearest Neighbors ◽  
Biquadratic Exchange ◽  
Model Hamiltonian

The ground-state phase diagrams are obtained for the spin-2 Ising model Hamiltonian with bilinear and biquadratic exchange interactions and a single-ion crystal field. The interactions are assumed to be only between nearest-neighbors. Obtained phase diagrams are presented in the (Δ,J), (K,J), (Δ/J,K/J), (Δ/|J|,K/|J|), (Δ/|K|,J/|K|), (H/J,Δ/J), (H/|J|,Δ/|J|), (H/J,K/J), and (H/|J|,K/|J|) planes where J, K, Δ, and H are the bilinear, biquadratic exchange interactions, the single-ion crystal field, and the external magnetic field, respectively. The influence of the external magnetic field on the spin configurations is investigated.

scholarly journals Theoretical Study of Upper Critical Magnetic Field (HC2) in Multiband Iron Based Superconductors

2016 ◽  
Vol 2016 ◽  
pp. 1-10 ◽  
Author(s):  
Tsadik Kidanemariam ◽  
Gebregziabher Kahsay
Keyword(s):  
Magnetic Field ◽  
Phase Diagrams ◽  
Penetration Depth ◽  
Coherence Length ◽  
Symmetry Axis ◽  
Critical Magnetic Field ◽  
Ginzburg Landau ◽  
Iron Based Superconductors ◽  
Upper Critical Magnetic Field ◽  
Iron Based

This research work focuses on the theoretical investigation of the upper critical magnetic field,HC2; Ginzburg-Landau coherence length,ξGL(T); and Ginzburg-Landau penetration depth,λGL(T), for the two-band iron based superconductorsBaFe2(As1-xPx)2,NdO1-xFxFeAs, and LiFeAs. By employing the phenomenological Ginzburg-Landau (GL) equation for the two-band superconductorsBaFe2(As1-xPx)2,NdO1-xFxFeAs, and LiFeAs, we obtained expressions for the upper critical magnetic field,HC2; GL coherence length,ξGL; and GL penetration depth,λGL, as a function of temperature and the angular dependency of upper critical magnetic field. By using the experimental values in the obtained expressions, phase diagrams of the upper critical magnetic field parallel,HC2∥c, and perpendicular,HC2⊥c, to the symmetry axis (c-direction) versus temperature are plotted. We also plotted the phase diagrams of the upper critical magnetic field,HC2versus the angleθ. Similarly, the phase diagrams of the GL coherence length,ξGL, and GL penetration depth,λGL, parallel and perpendicular to the symmetry axis versus temperature are drawn for the superconductors mentioned above. Our findings are in agreement with experimental observations.

Magnetic field-temperature phase diagrams of multiferroic (Ni0.9Co0.1)3V2O8

2016 ◽  
Vol 94 (17) ◽  
Author(s):  
N. Qureshi ◽  
E. Ressouche ◽  
A. A. Mukhin ◽  
V. Yu. Ivanov ◽  
S. N. Barilo ◽  
...  
Keyword(s):  
Magnetic Field ◽  
Phase Diagrams ◽  
Temperature Phase ◽  
Field Temperature

HIGH MAGNETIC FIELD SPIN-PEIERLS PHASE DIAGRAMS

1983 ◽  
pp. 19-36 ◽  
Author(s):  
D. Bloch ◽  
J. Voiron ◽  
L.J. de Jongh
Keyword(s):  
Magnetic Field ◽  
Phase Diagrams ◽  
High Magnetic Field

Microstructure of magnetic field on permanent magnet surface

2016 ◽  
Author(s):  
Поляков ◽  
Petr Polyakov ◽  
Гинзбург ◽  
B. Ginzburg ◽  
Каминская ◽  
...  
Keyword(s):  
Magnetic Field ◽  
Atomic Force Microscopy ◽  
Permanent Magnet ◽  
Phase Diagrams ◽  
Magnetic Structure ◽  
Force Microscopy ◽  
Atomic Force ◽  
Ndfeb Permanent Magnet ◽  
Magnet Surface

In this case we investigate the NdFeB permanent magnet by the atomic force microscopy. Obtained phase diagrams in the center and on the edge of the sample. We investigate the uniformity of the magnetic structure.

Field-Induced Columnar and Bent-Wall-Like Patterns in a Ferrofluid Emulsion

1999 ◽  
Vol 13 (14n16) ◽  
pp. 2093-2100 ◽  
Author(s):  
G. A. Flores ◽  
J. Liu ◽  
M. Mohebi ◽  
N. Jamasbi
Keyword(s):  
Magnetic Field ◽  
Optical Microscopy ◽  
Phase Diagrams ◽  
Particle Concentration ◽  
Field Application ◽  
Structural Transitions ◽  
Tuning Parameters ◽  
Average Complexity ◽  
The Magnetic Field ◽  
Magnetic Field Application

Using optical microscopy, we studied magnetic-field-induced structures in a confined ferrofluid emulsion. Disks, "worms" and branch-like patterns are observed in 2-D, reflecting columnar, bent-wall-like and labyrinthine structures in 3-D. These structures are controlled by varying either the thickness of the cell used to confine the sample, the particle concentration, or the rate of the magnetic field application. The induced structures are characterized by both the ratio of "worms" vs. total aggregates and the average complexity of the aggregates. "Phase" diagrams are obtained between these tuning parameters to characterize columnar to bent-wall structural transitions.

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