000132484 001__ 132484 000132484 005__ 20250923084413.0 000132484 0247_ $$2doi$$a10.1021/acsnano.3c06704 000132484 0248_ $$2sideral$$a137558 000132484 037__ $$aART-2024-137558 000132484 041__ $$aeng 000132484 100__ $$0(orcid)0000-0002-1734-1405$$aGonzález-Gutiérrez, Carlos A. 000132484 245__ $$aScanning spin probe based on magnonic vortex quantum cavities 000132484 260__ $$c2024 000132484 5060_ $$aAccess copy available to the general public$$fUnrestricted 000132484 5203_ $$aPerforming nanoscale scanning electron paramagnetic resonance (EPR) requires three essential ingredients: First, a static magnetic field together with field gradients to Zeeman split the electronic energy levels with spatial resolution; second, a radio frequency (rf) magnetic field capable of inducing spin transitions; finally, a sensitive detection method to quantify the energy absorbed by spins. This is usually achieved by combining externally applied magnetic fields with inductive coils or cavities, fluorescent defects, or scanning probes. Here, we theoretically propose the realization of an EPR scanning sensor merging all three characteristics into a single device: the vortex core stabilized in ferromagnetic thin-film discs. On one hand, the vortex ground state generates a significant static magnetic field and field gradients. On the other hand, the precessional motion of the vortex core around its equilibrium position produces a circularly polarized oscillating magnetic field, which is enough to produce spin transitions. Finally, the spin–magnon coupling broadens the vortex gyrotropic frequency, suggesting a direct measure of the presence of unpaired electrons. Moreover, the vortex core can be displaced by simply using external magnetic fields of a few mT, enabling EPR scanning microscopy with large spatial resolution. Our numerical simulations show that, by using low damping magnets, it is theoretically possible to detect single spins located on the disc’s surface. Vortex nanocavities could also attain strong coupling to individual spin molecular qubits with potential applications to mediate qubit–qubit interactions or to implement qubit readout protocols. 000132484 536__ $$9info:eu-repo/grantAgreement/ES/CSIC/PTI-001$$9info:eu-repo/grantAgreement/ES/DGA/E09-23R$$9info:eu-repo/grantAgreement/EC/H2020/948986/EU/Quantum Fast Spin dynamics addressed by High-Tc superconducting circuits/QFAST$$9This project has received funding from the European Union’s Horizon 2020 research and innovation program under grant agreement No H2020 948986-QFAST$$9info:eu-repo/grantAgreement/ES/MICINN-AEI/PID2020-115221GB-C41$$9info:eu-repo/grantAgreement/ES/MICINN-AEI/PRTR-C17.I1$$9info:eu-repo/grantAgreement/ES/MICINN/EUR2019-103823$$9info:eu-repo/grantAgreement/ES/MICINN/RTI2018-096075-B-C21$$9info:eu-repo/grantAgreement/EUR/MICINN/TED2021-131447B-C21 000132484 540__ $$9info:eu-repo/semantics/openAccess$$aby$$uhttp://creativecommons.org/licenses/by/3.0/es/ 000132484 590__ $$a16.0$$b2024 000132484 592__ $$a4.497$$b2024 000132484 591__ $$aCHEMISTRY, PHYSICAL$$b16 / 185 = 0.086$$c2024$$dQ1$$eT1 000132484 593__ $$aEngineering (miscellaneous)$$c2024$$dQ1 000132484 591__ $$aNANOSCIENCE & NANOTECHNOLOGY$$b13 / 147 = 0.088$$c2024$$dQ1$$eT1 000132484 593__ $$aPhysics and Astronomy (miscellaneous)$$c2024$$dQ1 000132484 591__ $$aCHEMISTRY, MULTIDISCIPLINARY$$b16 / 239 = 0.067$$c2024$$dQ1$$eT1 000132484 593__ $$aNanoscience and Nanotechnology$$c2024$$dQ1 000132484 591__ $$aMATERIALS SCIENCE, MULTIDISCIPLINARY$$b28 / 460 = 0.061$$c2024$$dQ1$$eT1 000132484 593__ $$aMaterials Science (miscellaneous)$$c2024$$dQ1 000132484 655_4 $$ainfo:eu-repo/semantics/article$$vinfo:eu-repo/semantics/publishedVersion 000132484 700__ $$aGarcía-Pons, David 000132484 700__ $$0(orcid)0000-0003-4478-1948$$aZueco, David 000132484 700__ $$0(orcid)0000-0002-8125-877X$$aMartínez-Pérez, María José 000132484 773__ $$g18, 6 (2024), 4717-4725$$pACS Nano$$tACS NANO$$x1936-0851 000132484 8564_ $$s5712558$$uhttps://zaguan.unizar.es/record/132484/files/texto_completo.pdf$$yVersión publicada 000132484 8564_ $$s3373612$$uhttps://zaguan.unizar.es/record/132484/files/texto_completo.jpg?subformat=icon$$xicon$$yVersión publicada 000132484 909CO $$ooai:zaguan.unizar.es:132484$$particulos$$pdriver 000132484 951__ $$a2025-09-22-14:31:33 000132484 980__ $$aARTICLE