Role of structural factors in formation of chiral magnetic soliton lattice in Cr1/3NbS2

Abstract

Toward accurate thermochemical models for transition metals: G3Large basis sets for atoms Sc-Zn Density functional study of mononitrosyls of first-row transition-metal atomsThe sign and strength of magnetic interactions not only between nearest neighbors, but also for longer-range neighbors in the Cr 1/3 NbS 2 intercalation compound have been calculated on the basis of structural data. It has been found that left-handed spin helices in Cr 1/3 NbS 2 are formed from strength-dominant at low temperatures antiferromagnetic (AFM) interactions between triangular planes of Cr 3þ ions through the plane of just one of two crystallographically equivalent diagonals of side faces of embedded into each other trigonal prisms building up the crystal lattice of magnetic Cr 3þ ions. These helices are oriented along the c axis and packed into two-dimensional triangular lattices in planes perpendicular to these helices directions and lay one upon each other with a displacement. The competition of the above AFM helices with weaker inter-helix AFM interactions could promote the emergence of a long-period helical spin structure. One can assume that in this case, the role of Dzyaloshinskii-Moriya interaction consists of final ordering and stabilization of chiral spin helices into a chiral magnetic soliton lattice. The possibility of emergence of solitons in M 1/3 NbX 2 and M 1/3 aX 2 (M ¼ Cr, V, Ti, Rh, Ni, Co, Fe, and Mn; X ¼ S and Se) intercalate compounds has been examined. Two important factors caused by the crystal structure (predominant chiral magnetic helices and their competition with weaker inter-helix interactions not destructing the system quasi-one-dimensional character) can be used for the crystal chemistry search of solitons. V C 2014 AIP Publishing LLC. [http://dx.

Critical Behavior and Macroscopic Phase Diagram of the Monoaxial Chiral Helimagnet Cr1/3NbS2

“…The chiral helimagnetic structures in noncentrosymmetric magnetic materials, which arise from the competition between the antisymmetric Dzyaloshinskii-Moriya interaction and symmetric exchange 1–3 , exhibit a range of variations in the nature of their magnetic ordering, such as itinerant vs. localized moments, critical behavior, and magnetocrystalline anisotropy. The cubic B20 helimagnets, MnSi 4, 5 , FeGe 6, 7 , and Fe 1−x Co x Si 8, 9 display itinerant magnetism, with the latter two belonging to the 3D Heisenberg universality class and the former exhibiting tricritical mean-field behavior.…”

Investigation of structural changes in chiral magnet Cr1∕3NbS2 under application of pressure

“…The change in the distortion of CrS 6 influences the exchange network between Cr 3þ ions. 13 The magnetic network of Cr 1=3 NbS 2 is considered to be a two-dimensional Heisenberg system, 6,13 and consequently T C is a function of both the correlation length on the ab-plane, n 2D (T), at T ¼ T C and the interplane interaction along the c-axis, J 0 as…”

“…12 The crystal lattice of magnetic Cr comprises flat triangular planes parallel to the ab-plane. 13 The triangular planes are located periodically at a distance of c/2, with a displacement by distance of a/3 and b/3. 13 It has been experimentally verified that the ab-plane forms the magnetically easy plane.…”

Frustrated Antiferromagnetic Spin Chains of Edge-Sharing Tetrahedra in Volcanic Minerals K3Cu3(Fe0.82Al0.18)O2(SO4)4 and K4Cu4O2(SO4)4MeCl

“…To determine the characteristics of magnetic interactions (type of the magnetic moments ordering and strength of magnetic coupling) in minerals K3Cu3(Fe0.82Al0.18)O2(SO4) 4 and K4Cu4O2(SO4)4MeCl, we used the earlier developed phenomenological method (named the "crystal chemistry method") and the program "MagInter" created on its basis. [17][18][19][20][21] In this method three wellknown concepts about the nature of magnetic interactions are used. Firstly, Kramers's idea [22], according to which in exchange couplings between magnetic ions.…”