This title appears in the Scientific Report :
2006
Please use the identifier:
http://dx.doi.org/10.1140/epjb/e2006-00080-6 in citations.
Structural and magnetic properties of [Er/Tb] multilayers
Structural and magnetic properties of [Er/Tb] multilayers
We have investigated the structural and magnetic properties of [Er vertical bar Tb] multilayers by different scattering methods. Diffuse X-ray scattering under grazing incidence reveals the interface structure in [Er vertical bar Tb] bilayers and trilayers, indicating vertically correlated roughness...
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Personal Name(s): | Voigt, J. |
---|---|
Kentzinger, E. / Rücker, U. / Schweika, W. / Wermeille, D. / Schmidt, W. / Brückel, T. | |
Contributing Institute: |
JARA-FIT; JARA-FIT JCNS; JCNS Neutronenstreuung; IFF-INS Streumethoden; IFF-ISM |
Published in: | The @European physical journal / B, 49 (2006) S. 441 - 451 |
Imprint: |
Berlin
Springer
2006
|
Physical Description: |
441 - 451 |
DOI: |
10.1140/epjb/e2006-00080-6 |
Document Type: |
Journal Article |
Research Program: |
Großgeräte für die Forschung mit Photonen, Neutronen und Ionen (PNI) Kondensierte Materie |
Series Title: |
European Physical Journal B
49 |
Subject (ZB): | |
Publikationsportal JuSER |
We have investigated the structural and magnetic properties of [Er vertical bar Tb] multilayers by different scattering methods. Diffuse X-ray scattering under grazing incidence reveals the interface structure in [Er vertical bar Tb] bilayers and trilayers, indicating vertically correlated roughness between the Er and Tb interfaces. The magnetic properties of [Er-nEr vertical bar Tb-nTb] superlattices have been studied as a function of the superlattice composition (indices denote the number of atomic layers). Coupled ferromagnetic structures exist in all investigated samples. The phase transition temperature varies with the Tb layer thickness. Modulated magnetic order is short range for all samples beside the [Er-20 vertical bar Tb-5] superlattice, the sample with the smallest Tb layer thickness. We observe dipolar antiferromagnetic coupling between single ferromagnetic Tb layers in all samples, with the onset of this ordering depending on the Tb layer thickness. Due to competing interactions, exchange coupling is limited to the interface near region. Therefore long range modulated magnetic order is observed in the [Er-20 vertical bar Tb-5] superlattice only, where the interface regions overlap. The distinct differences to the magnetic structure of an Er0.8Tb0.2 alloy film are explained by a highly anisotropic arrangement of neighbouring atoms due to the correlated roughness. |