Manipulation of the short-wavelength interlayer exchange coupling in Fe/Cr multilayers via interface alloying

Uzdin, V. M.; Demangeat, C.

doi:10.1103/physrevb.66.092408

Cited by 15 publications

(16 citation statements)

References 19 publications

(21 reference statements)

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“…This observation suggests that the lower interface seems to be flatter on an atomic scale ͑consistency with RHEED obser-vations͒ and/or shows less ''interdiffusion'' than the upper interface. This difference between lower and upper interfaces is similar to previous observations for Fe/Cr, 10,24,25 Fe/V ͑Ref. 26͒ multilayers and others systems.…”

Section: B Magnetic Propertiessupporting

confidence: 92%

“…Within this model the spacer layer magnetic structure is an helicoidal antiferromagnet, and the coupling originates from the direct d-d exchange interaction at the Fe-Mn interfaces and propagates through the magnetic ordering of the spacer layer via short-range exchange interaction. Also for sandwich systems, interface effects have been extensively studied in order to understand the coupling mechanism 10 as well as specific interface-related phenom-ena, such as spin reorientation, 11 the spin-polarization effect, 12 etc.…”

Section: Introductionmentioning

confidence: 99%

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Interface and bulk properties of Fe/Mn sandwich structures

et al. 2003

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Structural and magnetic properties of Fe(5 nm)/Mn(t Mn )/Fe(5 nm) (t Mn from 0.5 to 3.0 nm͒ sandwich structures, grown by molecular-beam epitaxy between 50°C and 150°C, were investigated using reflection high-energy electron diffraction ͑RHEED͒, x-ray-diffraction, Mössbauer spectroscopy, and magnetization measurements. Epitaxial bct-Mn structures only form for t Mn Ͻ1 nm, independently of the growth temperature. Room-temperature conversion electron Mössbauer spectra are composed of two magnetic components with in-plane magnetic moments. The first subspectrum has hyperfine parameters close to ␣-Fe and is therefore associated with Fe atoms far from the interface regions. The second component, fitted with a hyperfine field ͑hf͒ distribution, has an isomer-shift value similar to ␣-Fe and a maximum in the distribution curve at about 31 T. This subspectrum is related to the Fe atoms close to the Mn layer ͑interface regions͒. Low-field components in the hf distribution curves indicate the presence of Fe atoms or/and Fe clusters in the Mn spacers. An Fe-Mn alloy was observed for the samples grown for temperatures higher than or equal to 50°C and where the RHEED patterns show the presence of the ␣-Mn phase. Magnetization data show that the Fe layers are ferromagnetically coupled for all trilayers prepared at substrate temperatures lower than 150°C. A noncollinear coupling was found for the trilayer with Mn thickness of 1 nm and grown at 150°C.

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Section: B Magnetic Propertiessupporting

confidence: 92%

Section: Introductionmentioning

confidence: 99%

Interface and bulk properties of Fe/Mn sandwich structures

et al. 2003

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“…2b). Similar results were obtained in different multilayered systems based on Fe, such as Fe/Cr and Fe/V [9,10].…”

Section: Chemical Depth Profilessupporting

confidence: 75%

“…Different models, either thermodynamic [11] or ballistic [9], have been proposed to explain the asymmetry of the interfaces. These models do not account for the cause of this chemical asymmetry, which in our case could originate from the difference between Fe and Mn surface energies, 2.939 J m À 2 and 1.440 J m À 2 , respectively [12,13].…”

Section: Chemical Depth Profilesmentioning

confidence: 99%

Interface local chemistry and magnetic asymmetry in (Fe/Mn) multilayers

Bahoui

Cadel

Ott

et al. 2015

Physica B: Condensed Matter

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“…In principle, the intermixing parameter ζ can be different for different interfaces. Such a model for intermixing with subsequent self-consistent calculations of magnetic moments on each site was applied to describe the magnetic properties of the Fe/V superlattices under hydrogenation [7], for interpretation of Mössbauer spectra in Fe/V [8] and Fe/Cr [6] multilayers and for explanation of the π-phase shift of the interlayer exchange coupling oscillations in the Fe/Cr/Fe trilayers on Fe whisker [9].…”

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confidence: 99%

Intermixing during epitaxial growth and Mössbauer spectroscopy with probe layers

Семенов

Uzdin

2006

Hyperfine Interact

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Mössbauer spectroscopy with 57 Fe ( 119 Sn) probe layers is a useful method to study the local magnetic structures at buried interfaces. However interface alloying, which always exists in the real samples, have to be taken into account for accurate interpretation of experimental data. We developed an algorithm, which describes the interface intermixing in the multilayers. Substituting deposited atoms by atoms of substrate and floating of deposited atoms in the upper layers during epitaxial growth leads to the formation of asymmetric chemical and magnetic interfaces. This asymmetry in the M 1 /M 2 superlattices can explain the difference between magnetic responses from M 1 on M 2 and M 2 on M 1 interfaces which were observed in experiments. Applying this intermixing model to the systems with probe layers located at different distances from the interfaces gives the natural explanation of hyperfine fields distributions on probe atoms and helps us clarify some discrepancies reported in the literature. Key words interface asymmetry . interdiffusion . hyperfine fields in multilayersInterface alloying is a common phenomenon, which always takes place to some degree during epitaxial growth of metallic multilayers. Atomic scale intermixing is one of the main types of interface roughness, and, therefore, it has to be taken into account for accurate interpretation of experiments. Mössbauer spectroscopy can be used to study the local magnetic interface structure in the superlattices with probe 57 Fe (or 119 Sn) layers. Insertion of such layers at set distances from the interface makes it possible to obtain the distribution of magnetic hyperfine fields (hff) in these particular layers [1]. The existence of probe atoms with various magnetic moments and with different local environments near the interface leads to the appearance of satellite lines in the Mössbauer spectra. However, interpretating these data happens to be a complicated and ambiguous task. If interdiffusion was present during the sample preparation process, the probe atoms are distributed in

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Manipulation of the short-wavelength interlayer exchange coupling in Fe/Cr multilayers via interface alloying

Cited by 15 publications

References 19 publications

Interface and bulk properties of Fe/Mn sandwich structures

Interface and bulk properties of Fe/Mn sandwich structures

Interface local chemistry and magnetic asymmetry in (Fe/Mn) multilayers

Intermixing during epitaxial growth and Mössbauer spectroscopy with probe layers

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