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Josephson Current Influence on the Induced Magnetization in Triplet Ferromagnetic Junctionsтезисы доклада
- Авторы: Pugach N.G., Buzdin A.I.
- Сборник: V Euro-Asian Symposium "Trends in MAGnetism": Nanomagnetism (EASTMAG-2013), 15th-21st September 2013
- Тезисы
- Год издания: 2013
- Место издания: Directorate of publishing activities of Far Eastern Federal University, Vladivostok, Russia
- Первая страница: 259
- Последняя страница: 259
- Аннотация: Recently, a magnetic moment induced in the superconductor of a superconductor-ferromagnet bilayer was reported [1,2] in accordance with the previous predictions [3-6]. Another unusual effect highlighted in the SF heterostructures is the triplet superconductivity. It was demonstrated theoretically [7-9] that a non-collinear magnetization in the SF heterostructures may lead to the creation of spin-triplet superconducting correlations with a non-zero total spin projection on the quantization axis. The exchange magnetic field does not destroy them, thus leading to a long-range superconducting correlations penetrating into the F region. The experimental evidence of such triplet correlations was revealed by the recent observation of long-range Josephson currents [10-12] that was an important breakthrough in this domain. Here we demonstrate under which conditions it may be possible to generate the magnetization by the triplet component in the Josephson junction. Such induced magnetization occurs at a relatively large distance and it is sensitive to the superconducting phase difference [13,14]. This opens interesting perspectives to couple the Josephson and magnetic effects. The induced magnetic moment, provided by the bands electrons, is calculated in a variety of Josephson junctions with multilayered ferromagnetic weak link [15]. The noncollinear magnetization of the F layers provides the conditions necessary to generate triplet superconducting correlations. It leads to the long-range induced magnetic moment, emerging in the superconducting layers and depending on the Josephson phase. By tuning the Josephson current, one may control the long-range induced magnetic moment. Alternatively, applying the voltage we can generate an oscillatory magnetic moment. The proposed mechanism seems to be attractive for superconducting spintronic devices with low dissipation.
- Добавил в систему: Пугач Наталия Григорьевна