Full-switching FSF-type superconducting spin-triplet magnetic random access memory element
| Autor: | Siegfried Horn, Anatolie Sidorenko, Lenar Tagirov, D. Lenk, Yu. N. Khaydukov, H.-A. Krug von Nidda, V. I. Zdravkov, G. Obermeier, R. Morari, C. Müller, Aladin Ullrich, Reinhard Tidecks |
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| Jazyk: | angličtina |
| Rok vydání: | 2017 |
| Předmět: |
Superconductivity
Physics Condensed matter physics Magnetic structure Field (physics) Film plane 02 engineering and technology Type (model theory) 021001 nanoscience & nanotechnology 01 natural sciences Magnetic field Orientation (vector space) Condensed Matter::Superconductivity 0103 physical sciences 010306 general physics 0210 nano-technology Spin-½ |
| Zdroj: | Physical Review B |
| Popis: | In the present work a superconducting Co/${\mathrm{CoO}}_{x}$/${\text{Cu}}_{41}{\text{Ni}}_{59}$/Nb/${\text{Cu}}_{41}{\text{Ni}}_{59}$ nanoscale thin film heterostructure is investigated, which exhibits a superconducting transition temperature, ${T}_{c}$, depending on the history of magnetic field applied parallel to the film plane. In more detail, around zero applied field, ${T}_{c}$ is lower when the field is changed from negative to positive polarity (with respect to the cooling field), compared to the opposite case. We interpret this finding as the result of the generation of the odd-in-frequency triplet component of superconductivity arising at noncollinear orientation of the magnetizations in the ${\text{Cu}}_{41}{\text{Ni}}_{59}$ layer adjacent to the ${\mathrm{CoO}}_{x}$ layer. This interpretation is supported by superconducting quantum interference device magnetometry, which revealed a correlation between details of the magnetic structure and the observed superconducting spin-valve effects. Readout of information is possible at zero applied field and, thus, no permanent field is required to stabilize both states. Consequently, this system represents a superconducting magnetic random access memory element for superconducting electronics. By applying increased transport currents, the system can be driven to the full switching mode between the completely superconducting and the normal state. |
| Databáze: | OpenAIRE |
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