Spiral structures in layered magnets

Rosenfeld, E. V.; Мушников, Н. В.; Dyakin, V. V.

doi:10.1002/pssb.200945143

Cited by 7 publications

(3 citation statements)

References 18 publications

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“…The analysis of neutron diffraction spectra of YMn 6 Sn 6 shows that the magnetization of Mn layer rotates by only $ 101 through the Mn-Sn-Mn slab, a far more significant turn by an angle of $ 1001 occurs through the Mn-R(Sn)-Mn slab [2]. Considering three different exchange interactions between the ferromagnetic Mn layer, we developed a model [7,8] which allows us to determine the exchange and anisotropy parameters and to predict the behavior of the spiral magnetic structure in magnetic field. The model has been applied to explain magnetic phase transitions in ErMn 6 À xFe x Sn 6 compounds [9].…”

Section: Resultsmentioning

confidence: 99%

Magnetic phase transitions in layered intermetallic compounds

Mushnikov

Gerasimov

Rosenfeld

et al. 2012

Journal of Magnetism and Magnetic Materials

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Section: Resultsmentioning

confidence: 99%

Magnetic phase transitions in layered intermetallic compounds

Mushnikov

Gerasimov

Rosenfeld

et al. 2012

Journal of Magnetism and Magnetic Materials

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“…The first involves an assumption on the coexistence in the crystal of several phases of the double‐spiral type. To check the correctness of this assumption, the problem on the stability of different types of spirals in an isotropic layered magnet was considered in our late work 15. There, a method of determination of the whole set of magnetic structures which could in principle exist in a layered magnet with any number of nonequivalent magnetic layers was proposed.…”

Section: Problem Statementmentioning

confidence: 99%

Domains in helicoidal magnetic structure

Rosenfeld

2010

Physica Status Solidi (b)

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Theoretical investigation of the magnetic spiral behavior in a layered magnet with strong hexagonal magnetic anisotropy has been performed. It is shown that if the exchange integrals between the first and second neighboring layers meet the requirement jJ 1 j ¼ ÀJ 2 , the energy densities for spirals with three and four (at J 1 < 0) or four and six (at J 1 > 0) layers in the period coincide. Moreover, near the surface of contact of the above phases the energy density is equal to or even lower than inside each of them, which should result in the appearance of a domain magnetic structure.ß 2010 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim 1 Introduction Materials in which alteration of magnetic structure accompanied by changes in conductivity, electrical polarization, optical properties, etc., arises upon small variations in some external parameters are attractive for practical applications. The processes of such type can take place either if a new magnetic phase appears in the course of a first-order transition or if a domain magnetic structure with easily moveable boundaries exists in the system. In particular, it would seem promising to produce domain structure in a layered magnet, i.e., natural or artificial crystal or film consisting of atomic layers with ferromagnetic ordering of magnetic moments inside them. In such structure, magnetic spirals could form, and if the energy densities for helicoids with different periods are close to each other, these helicoids would form stratified ''domain structure.'' In this case, magnetic scattering of particles with the wavelength of the order of interlayer distance could be controlled by changing the relative volumes of helicoids. The recent studies of complex magnets consisting of pairs of not identical magnetic layers give us some grounds to suppose that strongly different magnetic spirals could actually coexist.The above studies deal with a considerable number of compounds in which magnetic layers are separated by alternating unequal spacings filled with different nonmagnetic atoms, and the type of spin ordering is identified as a double nested magnetic spiral.

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“…Studies on the spiral order in these systems could be traced back to the later of 1950's [1,2]. Up to now, many works on the spiral order have been published [3][4][5][6][7]. Among these studies, an interesting example is the onedimensional XXZ spin chain with unparallel boundary fields [7].…”

Section: Introductionmentioning

confidence: 99%

A Spin Chain With Spiral Orders: Perspectives of Quantum Information and Mechanical Response

Lin

2013

Int. J. Mod. Phys. B

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In this paper, we study the ground state of a one-dimensional exactly solvable model with a spiral order. While the model's energy spectra is the same as the one-dimensional transverse field Ising model, its ground state manifests spiral order with various periods. The quantum phase transition from a spiral-order phase to a paramagnetic phase is investigated in perspectives of quantum information science and mechanics. We show that the modes of the ground-state fidelity and its susceptibility can tell the change of periodicity around the critical point. We study also the spin torsion modulus which defines the coefficient of the potential energy stored under a small rotation. We find that at the critical point, it is a constant; while away from the critical point, the spin torsion modulus tends to zero.

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Spiral structures in layered magnets

Cited by 7 publications

References 18 publications

Magnetic phase transitions in layered intermetallic compounds

Magnetic phase transitions in layered intermetallic compounds

Domains in helicoidal magnetic structure

A Spin Chain With Spiral Orders: Perspectives of Quantum Information and Mechanical Response

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