Investigation of magnetically coupled ferromagnetic stripe arrays

Engel‐Herbert, Roman; Locatelli, Andrea; Cherifi, S.; Schaadt, D. M.; Mohanty, J.; Bauer, E.; Belkhou, Rachid; Heun, S.; Pavlovska, A.; Leo, Titus; Hesjedal, T.

doi:10.1007/s00339-006-3619-8

Cited by 15 publications

(23 citation statements)

References 20 publications

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“…5,8 Local magnetic techniques have therefore been used, such as magnetic force microscopy (MFM), [11][12][13] and X-ray magnetic circular dichroism photoemission electron microscopy (XMCD-PEEM). 10,14 Viewed from the film surface plane, the FM α-MnAs and N-FM β-MnAs phases coexist in a form of self-aligned array of stripes between around 20 and 50°C, 7,15 and the width of α-MnAs stripes is continuously tunable by varying the temperature. 10,11,14 The knowledge of the in-plane magnetic configuration is not sufficient to offer a full understanding of the structural local transition mechanisms in MnAs thin films for future applications.…”

Section: Introduction Epitaxial Mnas Thin Films Onmentioning

confidence: 99%

“…10,14 Viewed from the film surface plane, the FM α-MnAs and N-FM β-MnAs phases coexist in a form of self-aligned array of stripes between around 20 and 50°C, 7,15 and the width of α-MnAs stripes is continuously tunable by varying the temperature. 10,11,14 The knowledge of the in-plane magnetic configuration is not sufficient to offer a full understanding of the structural local transition mechanisms in MnAs thin films for future applications. The cross-section in-depth information with quantitative values of the magnetization at the nanometer scale is mandatory for a deeper analysis of the transition.…”

Section: Introduction Epitaxial Mnas Thin Films Onmentioning

confidence: 99%

“…5,8,10,11 Local techniques as high resolution transmission electron microscopy (TEM) can hardly bring accurate structural information as the lattice parameter difference between the two phases is too small and the crystal domain boundaries do not exhibit any singular features. 5,8 Local magnetic techniques have therefore been used, such as magnetic force microscopy (MFM), [11][12][13] and X-ray magnetic circular dichroism photoemission electron microscopy (XMCD-PEEM).…”

Section: Introduction Epitaxial Mnas Thin Films Onmentioning

confidence: 99%

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In Depth Spatially Inhomogeneous Phase Transition in Epitaxial MnAs Film on GaAs(001)

Gatel

Serin

et al. 2017

Nano Lett.

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Abstract. Most studies on MnAs material in its bulk form have been focused on its temperature dependent structural phase transition accompanied by a magnetic one.Magnetostructural phase transition parameters in thin MnAs films grown on GaAs substrate present however some differences from the bulk behavior, and local studies become mandatory for a deeper understanding of the mechanisms involved within the transition. Up to now, only surface techniques have been carried on, while the transition is a three dimensional phenomenon. We therefore developed an original nanometer scale methodology using electron holography to investigate the phase transition in an epitaxial MnAs thin film on GaAs(001) from the cross-section view. Using quantitative magnetic maps recorded at the nanometer scale as function of the temperature, our work provides a direct in situ observation of the inhomogeneous spatial distribution of the transition in the layer depth and brings new insights on the fundamental transition mechanisms.

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Section: Introduction Epitaxial Mnas Thin Films Onmentioning

confidence: 99%

Section: Introduction Epitaxial Mnas Thin Films Onmentioning

confidence: 99%

Section: Introduction Epitaxial Mnas Thin Films Onmentioning

confidence: 99%

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In Depth Spatially Inhomogeneous Phase Transition in Epitaxial MnAs Film on GaAs(001)

Gatel

Serin

et al. 2017

Nano Lett.

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“…At 200 K, the MnAs film exhibits a single α-phase structure. The progressive nucleation of the β phase is initiated above 200 K. It remains an unordered phase up to 280-290 K, beyond which it adopts a self-organized stripe pattern, leading to a strong increase of the coercive field [18,28].…”

mentioning

confidence: 99%

“…[28] showing a very dilute β phase, and the persistence of the pointed domains, unhindered by the nucleating stripes. The main effect of the coexistence of the α/β phase on the DW velocity at T=290 K is found in a depinning regime that extends from 6 to 13.5 mT, i.e.…”

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confidence: 99%

Fast domain wall dynamics in MnAs/GaAs films

et al. 2012

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Micromagnetic properties of epitaxial MnAs films on GaAs surfaces

Hesjedal¹,

Engel‐Herbert²,

Schaadt³

2007

Phys. Status Solidi (c)

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We present a systematic study of the micromagnetic properties of MnAs deposited by molecular-beam epitaxy on GaAs(001) and GaAs(111)B surfaces. In epitaxial MnAs films, the strain state in MnAs-onGaAs(001) (anisotropic) and MnAs-on-GaAs(111)B (isotropic) has a strong influence on the magnetostructural phase transition and thus the micromagnetic properties. The ferromagnetic α and the β phase coexist over a wide temperature range exhibiting self-organized, magnetically coupled nanostructures. Independent of the substrate orientation, magnetic flux-closure domain patterns are formed in the basal plane of MnAs. The spatial distribution of the phases in equilibrium (stripes and quasi-hexagonal islands, respectively) stabilizes various magnetic states, which were found experimentally and confirmed by micromagnetic simulations.

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Investigation of magnetically coupled ferromagnetic stripe arrays

Cited by 15 publications

References 20 publications

In Depth Spatially Inhomogeneous Phase Transition in Epitaxial MnAs Film on GaAs(001)

In Depth Spatially Inhomogeneous Phase Transition in Epitaxial MnAs Film on GaAs(001)

Fast domain wall dynamics in MnAs/GaAs films

Micromagnetic properties of epitaxial MnAs films on GaAs surfaces

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