Transformation of magnetic state under the influence of superconductivity in epitaxial V/Pd1-xFex bilayers (in English)
Abstract
We have performed ferromagnetic resonance (FMR) studies of epitaxial V/Pd1-xFex (001) bilayers with a V thickness of the order of 40 nm and with a Pd1-xFex thickness in the range from 0.8 nm to 4.4 nm. For a bilayer with a Pd1-xFex thickness of 1.2 nm and x = 0.03 the FMR measurements revealed a decrease of the effective magnetization 4$\pi Meff$ of the ferromagnetic layer below the superconducting transition temperature of vanadium. As a possible explanation for this decrease we suggest a spatial modulation of the ferromagnetic order in the Pd1-xFex layer due to modifications of the indirect exchange interaction of magnetic ions via conduction electrons in the superconducting state. A comparison with a recent theoretical investigation supports this possibility.
Supporting agencies: This work is supported by the Deutsche Forschungsgemeinschaft (SFB 491) and by the Russian Fund for Basic Research (Project No. 02-02-16688).
About the Authors
I. A. Garifullin
Zavoisky Physical-Technical Institute, Russian Academy of Sciences
Russian Federation
Russian Federation
420029 Kazan
N. N. Garif'yanov
Zavoisky Physical-Technical Institute, Russian Academy of Sciences
Russian Federation
Russian Federation
420029 Kazan
D. A. Tikhonov
Zavoisky Physical-Technical Institute, Russian Academy of Sciences
Russian Federation
Russian Federation
420029 Kazan
M. Z. Fattakhov
Zavoisky Physical-Technical Institute, Russian Academy of Sciences
Russian Federation
Russian Federation
420029 Kazan
K. Theis‑Bröhl
Institut für Experimentalphysik/Festkörperphysik, Ruhr-Universität Bochum
Germany
Germany
D-44780 Bochum
K. Westerholt
Institut für Experimentalphysik/Festkörperphysik, Ruhr-Universität Bochum
Germany
Germany
D-44780 Bochum
H. Zabel
Institut für Experimentalphysik/Festkörperphysik, Ruhr-Universität Bochum
Germany
Germany
D-44780 Bochum
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Review
For citations:
Garifullin I.A., Garif'yanov N.N., Tikhonov D.A., Fattakhov M.Z., Theis‑Bröhl K., Westerholt K., Zabel H. Transformation of magnetic state under the influence of superconductivity in epitaxial V/Pd1-xFex bilayers (in English). Magnetic Resonance in Solids. 2004;6(1):51-58.
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