scholarly journals Field-induced magnetic structures inTb2Ti2O7at low temperatures: From spin-ice to spin-flip structures

2010 ◽  
Vol 82 (17) ◽  
Author(s):  
A. P. Sazonov ◽  
A. Gukasov ◽  
I. Mirebeau ◽  
H. Cao ◽  
P. Bonville ◽  
...  
Keyword(s):  
Low Temperatures ◽  
Spin Ice ◽  
Magnetic Structures ◽  
Spin Flip

Spin flip diffusion length and giant magnetoresistance at low temperatures

1994 ◽  
Vol 72 (20) ◽  
pp. 3274-3277 ◽  
Author(s):  
Q. Yang ◽  
P. Holody ◽  
S.-F. Lee ◽  
L. L. Henry ◽  
R. Loloee ◽  
...  
Keyword(s):  
Low Temperatures ◽  
Giant Magnetoresistance ◽  
Diffusion Length ◽  
Spin Flip

Long-Range Order at Low Temperatures in Dipolar Spin Ice

2001 ◽  
Vol 87 (6) ◽  
Author(s):  
Roger G. Melko ◽  
Byron C. den Hertog ◽  
Michel J. P. Gingras
Keyword(s):  
Long Range ◽  
Low Temperatures ◽  
Range Order ◽  
Long Range Order ◽  
Spin Ice

Ising Model Simulation Of Magnetic Structures IN A Zn-Mg-Ho Structure Model

1998 ◽  
Vol 553 ◽  
Author(s):  
S. Matsuo ◽  
T. Ishimasa ◽  
H. Nakano
Keyword(s):  
Scattering Amplitudes ◽  
Magnetic Structure ◽  
Long Range ◽  
Low Temperatures ◽  
Model Simulation ◽  
Structure Model ◽  
Patterson Function ◽  
Magnetic Structures ◽  
Shortest Distance ◽  
Diffraction Patterns

AbstractSimulated annealing calculations were performed for Ising spins on Ho sites under Ruderman-Kittel-Kasuya-Yosida-like alternating exchange interactions for an icosahedral Zn-Mg-Ho structure model with intent to investigate the magnetic structures at low temperatures. Magnetic structures were analyzed by means of a Patterson function and diffraction patterns arising from spin-dependent scattering amplitudes. The diffraction patterns from the magnetic structure consist of spots at low temperatures in the case of an antiferromagnetic interaction for the shortest distance (3.37 Å) and a ferromagnetic interaction for the second shortest distance (5.46 Å). The Patterson maps indicate a long-range antiferromagnetic correlation. These facts mean that a long-range ordered magnetic structure is realized at low temperatures. The contrast of the diffraction patterns is different from the patterns arising from the spin-independent scattering amplitudes from the Ho sites. A reversed sign interaction, ferromagnetic for the shortest distance and antiferromagnetic for the second shortest distance, results in broad intensity minima in the magnetic diffraction at the positions of strong spots in the spin-independent diffraction by lattice sites. It corresponds to the degradation of the long-range correlation.

scholarly journals Group-theoretical analysis of structural instability, vacancy ordering and magnetic transitions in the system troilite (FeS)–pyrrhotite (Fe1−x S)

2019 ◽  
Vol 75 (6) ◽  
pp. 1208-1224 ◽  
Author(s):  
Charles R. S. Haines ◽  
Christopher J. Howard ◽  
Richard J. Harrison ◽  
Michael A. Carpenter
Keyword(s):  
Phase Diagram ◽  
Low Temperatures ◽  
Structural Instability ◽  
Exact Nature ◽  
Magnetic Structures ◽  
Atomic Displacements ◽  
Vacancy Ordering ◽  
Continuous Rotation ◽  
Ordered State ◽  
Group Theoretical Analysis

A group-theoretical framework to describe vacancy ordering and magnetism in the Fe1−x S system is developed. This framework is used to determine the sequence of crystal structures consistent with the observed magnetic structures of troilite (FeS), and to determine the crystallographic nature of the low-temperature Besnus transition in Fe0.875S. It is concluded that the Besnus transition is a magnetically driven transition characterized by the rotation of the moments out of the crystallographic plane to which they are confined above the transition, accompanied by small atomic displacements that lower the symmetry from monoclinic to triclinic at low temperatures. Based on the phase diagram, magnetically driven phase transitions at low temperatures are predicted in all the commensurate superstructures of pyrrhotite. Based on the phase diagram, magnetically driven spin reorientations at low temperatures are predicted in all the commensurate superstructures of pyrrhotite. The exact nature of the spin rotation is determined by the symmetry of the vacancy-ordered state and based on this spin-flop transitions in 3C and 5C pyrrhotite and a continuous rotation akin to that seen in 4C pyrrhotite are predicted. A Besnus-type transition is also possible in 6C pyrrhotite. Furthermore, it is clarified that 3C and 4C pyrrhotite carry a ferrimagnetic moment whereas 5C and 6C are antiferromagnetic.

Magnetic Structures of an Iron–Gadolinium Multilayer at Low Temperatures

2002 ◽  
Vol 41 (Part 1, No. 3A) ◽  
pp. 1331-1339 ◽  
Author(s):  
Nobuyoshi hosoito ◽  
Hiroo hashizume ◽  
Naoki ishimatsu ◽  
In-Tae bae ◽  
George srajer ◽  
...  
Keyword(s):  
Low Temperatures ◽  
Magnetic Structures

Magnetic properties and magnetic structures of TmSe at low temperatures

1979 ◽  
Vol 40 (C5) ◽  
pp. C5-358-C5-358 ◽  
Author(s):  
D. Debray ◽  
D. L. Decker ◽  
M. Sougi ◽  
R. Kahn ◽  
J. L. Buévoz
Keyword(s):  
Magnetic Properties ◽  
Low Temperatures ◽  
Magnetic Structures

scholarly journals Realization of the kagome spin ice state in a frustrated intermetallic compound

Science ◽  
2020 ◽  
Vol 367 (6483) ◽  
pp. 1218-1223 ◽  
Author(s):  
Kan Zhao ◽  
Hao Deng ◽  
Hua Chen ◽  
Kate A. Ross ◽  
Vaclav Petříček ◽  
...  
Keyword(s):  
Monte Carlo ◽  
Intermetallic Compound ◽  
Low Temperatures ◽  
Two Dimensions ◽  
Spin Ice ◽  
Water Ice ◽  
Theoretical Approaches ◽  
Thermodynamic Measurements ◽  
Different Types ◽  
Electric Dipoles

Spin ices are exotic phases of matter characterized by frustrated spins obeying local “ice rules,” in analogy with the electric dipoles in water ice. In two dimensions, one can similarly define ice rules for in-plane Ising-like spins arranged on a kagome lattice. These ice rules require each triangle plaquette to have a single monopole and can lead to different types of orders and excitations. Using experimental and theoretical approaches including magnetometry, thermodynamic measurements, neutron scattering, and Monte Carlo simulations, we establish HoAgGe as a crystalline (i.e., nonartificial) system that realizes the kagome spin ice state. The system features a variety of partially and fully ordered states and a sequence of field-induced phases at low temperatures, all consistent with the kagome ice rule.

scholarly journals Spin-ice behavior of three-dimensional inverse opal-like magnetic structures: Micromagnetic simulations

2017 ◽  
Vol 441 ◽  
pp. 609-619 ◽  
Author(s):  
I.S. Dubitskiy ◽  
A.V. Syromyatnikov ◽  
N.A. Grigoryeva ◽  
A.A. Mistonov ◽  
N.A. Sapoletova ◽  
...  
Keyword(s):  
Three Dimensional ◽  
Inverse Opal ◽  
Spin Ice ◽  
Micromagnetic Simulations ◽  
Magnetic Structures
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