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Magnetic interference patterns in 0−π superconductor/insulator/ferromagnet/superconductor Josephson junctions : Effects of asymmetry between 0 and π regions

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Magnetic interference patterns in 0−π superconductor/insulator/ferromagnet/superconductor Josephson junctions : Effects of asymmetry between 0 and π regions

Type of Publication: Journal article
Publication status: Published
Author: Kemmler, Matthias; Weides, Martin; Weiler, Mathias; Opel, Matthias; Gönnenwein, Sebastian T. B.; Vasenko, Andrey S.; Golubov, Alexander A.; Kohlstedt, Hermann; Koelle, Dieter; Kleiner, Reinhold; Goldobin, Edward
Year of publication: 2010
Published in: Physical Review B ; 81 (2010), 5. - 054522. - American Physical Society (APS). - ISSN 2469-9950. - eISSN 2469-9969
ArXiv-ID: arXiv:0910.5907
DOI (citable link): https://dx.doi.org/10.1103/PhysRevB.81.054522
Summary:
We present a detailed analysis of the dependence of the critical current Ic on an in-plane magnetic field B of 0, π, and 0−π superconductor-insulator-ferromagnet-superconductor Josephson junctions. Ic(B) of the 0 and the π junction closely follows a Fraunhofer pattern, indicating a homogeneous critical current density jc(x). The maximum of Ic(B) is slightly shifted along the field axis, pointing to a small remanent in-plane magnetization of the F-layer along the field axis. Ic(B) of the 0−π junction exhibits the characteristic central minimum. Ic, however, has a finite value here, due to an asymmetry of jc in the 0 and the π part. In addition, this Ic(B) exhibits asymmetric maxima and bumped minima. To explain these features in detail, flux penetration being different in the 0 part and the π part needs to be taken into account. We discuss this asymmetry in relation to the magnetic properties of the F-layer and the fabrication technique used to produce the 0−π junctions.
Subject (DDC): 530 Physics
Refereed: Yes

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KEMMLER, Matthias, Martin WEIDES, Mathias WEILER, Matthias OPEL, Sebastian T. B. GÖNNENWEIN, Andrey S. VASENKO, Alexander A. GOLUBOV, Hermann KOHLSTEDT, Dieter KOELLE, Reinhold KLEINER, Edward GOLDOBIN, 2010. Magnetic interference patterns in 0−π superconductor/insulator/ferromagnet/superconductor Josephson junctions : Effects of asymmetry between 0 and π regions. In: Physical Review B. American Physical Society (APS). 81(5), 054522. ISSN 2469-9950. eISSN 2469-9969. Available under: doi: 10.1103/PhysRevB.81.054522

@article{Kemmler2010Magne-53240, title={Magnetic interference patterns in 0−π superconductor/insulator/ferromagnet/superconductor Josephson junctions : Effects of asymmetry between 0 and π regions}, year={2010}, doi={10.1103/PhysRevB.81.054522}, number={5}, volume={81}, issn={2469-9950}, journal={Physical Review B}, author={Kemmler, Matthias and Weides, Martin and Weiler, Mathias and Opel, Matthias and Gönnenwein, Sebastian T. B. and Vasenko, Andrey S. and Golubov, Alexander A. and Kohlstedt, Hermann and Koelle, Dieter and Kleiner, Reinhold and Goldobin, Edward}, note={Article Number: 054522} }

Magnetic interference patterns in 0−π superconductor/insulator/ferromagnet/superconductor Josephson junctions : Effects of asymmetry between 0 and π regions Gönnenwein, Sebastian T. B. Goldobin, Edward Weiler, Mathias eng Opel, Matthias Goldobin, Edward Vasenko, Andrey S. Weides, Martin Weides, Martin Golubov, Alexander A. Weiler, Mathias Kemmler, Matthias 2010 We present a detailed analysis of the dependence of the critical current I<sub>c</sub> on an in-plane magnetic field B of 0, π, and 0−π superconductor-insulator-ferromagnet-superconductor Josephson junctions. I<sub>c</sub>(B) of the 0 and the π junction closely follows a Fraunhofer pattern, indicating a homogeneous critical current density j<sub>c</sub>(x). The maximum of I<sub>c</sub>(B) is slightly shifted along the field axis, pointing to a small remanent in-plane magnetization of the F-layer along the field axis. I<sub>c</sub>(B) of the 0−π junction exhibits the characteristic central minimum. I<sub>c</sub>, however, has a finite value here, due to an asymmetry of j<sub>c</sub> in the 0 and the π part. In addition, this I<sub>c</sub>(B) exhibits asymmetric maxima and bumped minima. To explain these features in detail, flux penetration being different in the 0 part and the π part needs to be taken into account. We discuss this asymmetry in relation to the magnetic properties of the F-layer and the fabrication technique used to produce the 0−π junctions. Kemmler, Matthias Kohlstedt, Hermann Koelle, Dieter Opel, Matthias Vasenko, Andrey S. Kleiner, Reinhold 2021-03-23T12:32:04Z Kleiner, Reinhold 2021-03-23T12:32:04Z terms-of-use Kohlstedt, Hermann Koelle, Dieter Gönnenwein, Sebastian T. B. Golubov, Alexander A.

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