Enhanced magnetic ordering transition temperature and broad dielectric relaxation in iron incorporated intergrown pyrochlore-spinel crystals

2018 ◽  
Vol 763 ◽  
pp. 409-420 ◽  
Author(s):  
Raja Altaf U Rahman ◽  
Peter Schmid-Beurmann ◽  
Ramaswamy Murugan
Keyword(s):  
Transition Temperature ◽  
Dielectric Relaxation ◽  
Magnetic Ordering ◽  
Ordering Transition

Compressive deformation of polycrystalline Ni-Mn-Ga alloys near chemical ordering transition temperature

2018 ◽  
Vol 142 ◽  
pp. 329-339 ◽  
Author(s):  
L.S. Wei ◽  
X.X. Zhang ◽  
M.F. Qian ◽  
P.G. Martin ◽  
L. Geng ◽  
...  
Keyword(s):  
Transition Temperature ◽  
Compressive Deformation ◽  
Chemical Ordering ◽  
Ordering Transition

Magnetic ordering transition of electrons on mesoscopic tubes

1993 ◽  
Vol 48 (23) ◽  
pp. 17545-17550 ◽  
Author(s):  
P. S. Davids ◽  
L. Wang ◽  
A. Saxena ◽  
A. R. Bishop
Keyword(s):  
Magnetic Ordering ◽  
Ordering Transition

Alteration of the stacked 2π/3 magnetic structure in the triangular lattice anti-ferromagnet LiCrS2

2001 ◽  
Vol 79 (11-12) ◽  
pp. 1427-1432
Author(s):  
A Lafond ◽  
W Henggeler ◽  
H Mutka ◽  
B Ouladdiaf
Keyword(s):  
Transition Temperature ◽  
Critical Temperature ◽  
Solid State ◽  
Elastic Scattering ◽  
Temperature Dependence ◽  
Triangular Lattice ◽  
Magnetic Ordering ◽  
Magnetic Scattering ◽  
Powder Samples ◽  
Anisotropic Interactions

LiCrS2 has magnetic Cr ions with spin S = 3/2 on a triangular lattice. Other researchers (J. Solid State Chem. 3, 590, 1971) concluded that this compound has an anti-ferromagnetic order with a stacked 2π/3 structure below a transition temperature of the order of TN = 50 K. We have re-examined this system with neutron scattering methods on powder samples, paying attention to the temperature dependence of the magnetic scattering. The overall characteristics of the magnetic ordering are in agreement with the earlier study but we have observed significant modifications of the stacked 2π/3 structure well below the critical temperature. The main new features observed on cooling from T = 25 K down to T = 1.5 K are (i) the gradual decrease from 2.5 µB to 2.3 µB of the ordered moment attributed to the 2π/3 structure, (ii) the appearance of new correlations corresponding to a multiplication of the magnetic unit cell, and (iii) the growth of a diffuse elastic scattering component that can be ascribed to a frozen disorder. These observation are not explained in the framework of the standard theoretical treatments concerning the stacked triangular anti-ferromagnet with Heisenberg or slightly anisotropic interactions. PACS Nos.: 75.10Nr, 75.25+z, 75.40Gb

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