Magnetization reversal of periodic arrays of magnetic elements

Theis‐Bröhl, Katharina

doi:10.1016/j.physb.2003.11.045

Cited by 5 publications

(1 citation statement)

References 27 publications

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“…The trend in nanosciences is shifting from continuous thin films to in-plane nanostructures. These nanostructures can be obtained by patterning or by self-organization [67][68][69][70]. In a number of studies, the influence of patterning on the exchange bias has been probed [71][72][73][74].…”

Section: Off-specular Scatteringmentioning

confidence: 99%

Neutron scattering on magnetic surfaces

Ott

2007

Comptes Rendus. Physique

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During the early 1980s, advanced techniques for the deposition of ultra-thin metal films were developed. The combination of different types of materials gave rise to new physical phenomena such as the magnetic exchange coupling in superlattices or the exchange bias between ferro and anti-ferro layers. The field was very active because of the associated industrial applications in magnetic field sensors. New types of heterostructures combining magnetic oxides, insulating oxides or magnetic semiconductors are still being developed. Alongside the fabrication of these new meta-materials made of thin films stacking, polarized neutron reflectometry has emerged as a routine tool for the characterization of magnetic hetero-structures. In the recent years, the new developments of polarized reflectivity have been connected to the study of micro and nanostructures, especially micromagnetic structures in multilayers. The technique of off-specular scattering has been developed for the study of the roughness or the micromagnetism at a micrometric scale. For the study of nanometric structures, in the range below 100 nm, grazing incidence Small Angle Scattering is being considered. To cite this article: F.

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Section: Off-specular Scatteringmentioning

confidence: 99%

Neutron scattering on magnetic surfaces

Ott

2007

Comptes Rendus. Physique

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Magnetism and Structure of Magnetic Multilayers Based on the Fully Spin Polarized Heusler Alloys Co2MnGe and Co2MnSn

Westerholt

Bergmann

Grabis

et al.

Half-Metallic Alloys

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Our Introduction starts with a short general review of the magnetic and structural properties of the Heusler compounds which are under discussion in this book. Then, more specifically, we come to the discussion of our experimental results on multilayers composed of the Heusler alloys Co2MnGe and Co2MnSn with V or Au as interlayers. The experimental methods we apply combine magnetization and magnetoresistivity measurements, x-ray diffraction and reflectivity, soft x-ray magnetic circular dichroism and spin polarized neutron reflectivity. We find that below a critical thickness of the Heusler layers at typically dcr = 1.5 nm the ferromagnetic order is lost and spin glass order occurs instead. For very thin ferromagnetic Heusler layers there are pecularities in the magnetic order which are unusual when compared to conventional ferromagnetic transition metal multilayer systems. In [Co2MnGe/Au] multilayers there is an exchange bias shift at the ferromagnetic hysteresis loops at low temperatures caused by spin glass ordering at the interface. In [Co2MnGe/V] multilayers we observe an antiferromagnetic interlayer long range ordering below a well defined Néel temperature originating from the dipolar stray fields at the magnetically rough Heusler layer interfaces.

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Neutron Reflectometry

Fermon

Ott²,

Menelle³

X-Ray and Neutron Reflectivity

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Magnetization reversal of periodic arrays of magnetic elements

Cited by 5 publications

References 27 publications

Neutron scattering on magnetic surfaces

Neutron scattering on magnetic surfaces

Magnetism and Structure of Magnetic Multilayers Based on the Fully Spin Polarized Heusler Alloys Co2MnGe and Co2MnSn

Neutron Reflectometry

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