Journal
PHYSICAL REVIEW B
Volume 99, Issue 18, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevB.99.180501
Keywords
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Funding
- EPSRC [EP/P026311/1, EP/N017242/1]
- Royal Society through a University Research Fellowship
- Leverhulme Trust
- EU Network COST (NANOCOHYBRI) [CA16218]
- Russian Foundation for Basic Research (RFBR) [17-52-12044-NNIO, 18-02-00390]
- French ANR project SUPERTRONICS
- French ANR project OPTOFLUXON-ICS
- EPSRC [EP/N017242/1, EP/P026311/1] Funding Source: UKRI
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At a superconductor interface with a ferromagnetic insulator (FI), the FI acts to induce a local exchange field within the S layer, which in the presence of spin-orbit interaction promotes a phase- modulated superconducting state. Here we demonstrate that within a thin superconducting loop that is partially proximitized by a FI, spontaneous currents form with a magnetization-orientation-dependent chirality with sizable shifts in Little-Parks oscillations. Furthermore, the critical temperature of the loop is also magnetization-orientation-dependent and conversely, the superconducting transition itself may influence the magnetization direction. More generally, the superconducting region above the FI serves as a phase battery and so offers a new device concept for superconducting spintronics.
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