Magnons in layered MnTe/CdTe structures

Jouanne, M.; Szuszkiewicz, W.; Morhange, J. F.; Kanehisa, M.; Hartmann, J. M.; Mariette, H.; Dynowska, E.; Karczewski, G.; Wójtowicz, T.; Kossut, J.; Barnaś, J.

doi:10.1016/s0022-0248(98)80197-8

Cited by 10 publications

(4 citation statements)

References 11 publications

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“…To verify this conjecture, we calculated numerically sums I n and J n according to their definitions ( 16) and ( 17), for a finite thin film of size 2La c × 2La c . The resulting values approach the same limit when L → ∞, exactly as anticipated in our postulate (23) (see figure 1). This result is very significant since substitution of ( 23) in ( 21) results in complete vanishing of the first term representing the contribution to the field h 0 coming from all neighbouring planes.…”

Section: Calculation Of Thin Film Dipolar Fieldssupporting

confidence: 83%

“…Besides two-and three-dimensional periodic composites, multilayer systems (providing an example of the simplest one-dimensional composite) are studied intensively. In particular, many surveys deal with magnetic multilayers [14][15][16][17][18][19][20][21][22][23]. The reason for this special theoretical interest is that in magnetic layered composites the local magnetic anisotropy, short-range exchange interactions and long-range dipolar forces are competing to determine static and dynamic properties of such materials.…”

Section: Introductionmentioning

confidence: 99%

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Spin-wave mode profiles versus surface/interface conditions in ferromagnetic Fe/Ni layered composites

Krawczyk

Puszkarski

Lévy

et al. 2003

J. Phys.: Condens. Matter

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Spin-wave excitations in ferromagnetic layered composite (AB · · · BA; A and B being different homogeneous ferromagnetic materials) are analysed theoretically, by means of the transfer matrix approach. The properties of multilayer spin-wave mode profiles are discussed in relation to multilayer characteristics, such as the filling fraction and the exchange or magnetization contrast; also, surface spin pinning conditions and dipolar interactions are taken into account. The interface conditions are satisfied by introducing an effective exchange field expressed by interface gradients of the exchange constant and the magnetization. This approach provides an easy way to find frequencies and amplitudes of standing spin waves in the multilayer. The developed theory is applied to interpretation of spin wave resonance (SWR) spectra obtained experimentally by Chambers et al in two systems: a bilayer Fe/Ni and a trilayer Ni/Fe/Ni, in perpendicular (to the multilayer surface) configuration of the applied magnetic field. By fitting the SWR spectra obtained experimentally and those found numerically, the surface anisotropies are estimated on multilayer surfaces; then, the observed resonance lines are identified as associated with bulk, surface or interface modes. The theory can be extended to a general case of any multi-component layered system.

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Section: Calculation Of Thin Film Dipolar Fieldssupporting

confidence: 83%

Section: Introductionmentioning

confidence: 99%

Spin-wave mode profiles versus surface/interface conditions in ferromagnetic Fe/Ni layered composites

Krawczyk

Puszkarski

Lévy

et al. 2003

J. Phys.: Condens. Matter

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“…The magnon energy for the wave-vector k = 0 was determined and the temperature dependence of the energy was found [10]. Some results were also obtained for spin waves in MnTe/CdTe superlattices [11]. Quite recently, with the use of the inelastic neutron-scattering technique magnon excitations have been observed in bulklike fcc MnTe films and MnTe/ZnTe superlattices [6,7,12].…”

Section: Introductionmentioning

confidence: 99%

Temperature dependence of magnetization in ultrathin MnTe films

Świrkowicz¹

2000

J. Phys.: Condens. Matter

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Spin waves and the temperature dependence of local magnetization are investigated in ultrathin MnTe(100) films with antiferromagnetic ordering of type III. Calculations are performed within the framework of the Heisenberg model with use of the Green function formalism. At a given temperature the local magnetization is calculated in a self-consistent way. The influence of parameter changes in thin films (exchange integrals, anisotropy constants) on the energy spectrum, local magnon density of states and local magnetization is investigated. The obtained results strongly depend on values of exchange integrals whereas the influence of changes in anisotropy constants is very weak. When the integrals in the growth direction are lower than in-plane values the temperature dependence of the mean magnetization does not strongly depend on the film thickness in consistency with experimental data.

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“…The first results of such investigations were published some time ago (see Ref. and references therein) but it was only recently that an increasing quality of MBE‐grown SLs enabled observation of the fine structure in Raman spectra related to the magnetic excitations. An example of an experimental spectrum, accompanied by the result of numerical simulation is shown in Fig.…”

Section: Raman Scattering Studies Of Zb Mnte Layers and Superlatticesmentioning

confidence: 99%

Raman scattering as a tool to characterize semiconductor crystals, thin layers, and low-dimensional structures containing transition metals

Szuszkiewicz

Jouanne

Morhange

et al. 2013

Phys. Status Solidi B

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Raman scattering is well known as an efficient, nondestructive experimental method to study a variety of physical properties of semiconductors. The sensitivity of modern Raman spectroscopy is illustrated by several results obtained for semiconductor bulk crystals, thin layers, or low‐dimensional structures, containing selected transition metals. Among examples of Raman scattering data are detection of precipitates, a study of the influence of strain on phonon and magnon frequencies, and a search for magnetic excitations or for new phenomena, characteristic of low‐dimensional structures are described. The presented examples concern a few materials, which attract today or have attracted in the past a lot of attention. This selection is limited to Mn and Co impurities and to such well‐known semiconductor materials as MnTe, (Ga,Mn)As, ZnO, and ZnTe. Comparison of the efficiency of Raman scattering on LO phonons (bottom right) with the PL efficiency for a semiconductor superlattice (upper left). The PL contribution to the total intensity due to the Cd0.88Zn0.12Te substrate is also shown.

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Magnons in layered MnTe/CdTe structures

Cited by 10 publications

References 11 publications

Spin-wave mode profiles versus surface/interface conditions in ferromagnetic Fe/Ni layered composites

Spin-wave mode profiles versus surface/interface conditions in ferromagnetic Fe/Ni layered composites

Temperature dependence of magnetization in ultrathin MnTe films

Raman scattering as a tool to characterize semiconductor crystals, thin layers, and low-dimensional structures containing transition metals

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