Nanometre-scale probing of spin waves using single electron spins
| Autor: | Toeno van der Sar, Francesco Casola, Ronald L. Walsworth, Amir Yacoby |
|---|---|
| Rok vydání: | 2015 |
| Předmět: |
Magnetism
FOS: Physical sciences General Physics and Astronomy Nanotechnology 02 engineering and technology 01 natural sciences Article General Biochemistry Genetics and Molecular Biology Magnetization Spin wave Mesoscale and Nanoscale Physics (cond-mat.mes-hall) 0103 physical sciences 010306 general physics Spin-½ Physics Multidisciplinary Condensed Matter - Mesoscale and Nanoscale Physics Condensed matter physics Spin polarization Spin engineering General Chemistry 021001 nanoscience & nanotechnology Spin ice Ferromagnetism Condensed Matter::Strongly Correlated Electrons 0210 nano-technology |
| Zdroj: | Nature communications Nature Communications |
| ISSN: | 2041-1723 |
| Popis: | Pushing the frontiers of condensed-matter magnetism requires the development of tools that provide real-space, few-nanometre-scale probing of correlated-electron magnetic excitations under ambient conditions. Here we present a practical approach to meet this challenge, using magnetometry based on single nitrogen-vacancy centres in diamond. We focus on spin-wave excitations in a ferromagnetic microdisc, and demonstrate local, quantitative and phase-sensitive detection of the spin-wave magnetic field at ∼50 nm from the disc. We map the magnetic-field dependence of spin-wave excitations by detecting the associated local reduction in the disc's longitudinal magnetization. In addition, we characterize the spin–noise spectrum by nitrogen-vacancy spin relaxometry, finding excellent agreement with a general analytical description of the stray fields produced by spin–spin correlations in a 2D magnetic system. These complementary measurement modalities pave the way towards imaging the local excitations of systems such as ferromagnets and antiferromagnets, skyrmions, atomically assembled quantum magnets, and spin ice. Exploring magnetic excitations and spin textures on the nanoscale may lead to new spintronic technologies and new understanding of condensed matter. Here, the authors demonstrate the potential of single-electron spins in diamond to image such excitations by characterizing spin waves in a ferromagnetic microdisc. |
| Databáze: | OpenAIRE |
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