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- Title
Magneto-Optical Kerr Effect Driven by Spin Accumulation on Cu, Au, and Pt.
- Authors
Choi, Gyung-Min
- Abstract
Featured Application: optical magnetometer. The magneto-optical Kerr effect (MOKE) has recently been achieved on non-ferromagnetic metals by injecting spin currents. To use the magneto-optical Kerr effect as a quantitative tool, it is crucial to study the relationship between the Kerr rotation angle and the spin accumulation on non-ferromagnets. In this work, I measure a transient magneto-optical Kerr rotation on non-ferromagnetic metals of Cu, Au, and Pt driven by an ultrafast spin current from an adjacent ferromagnetic metal. Through comparing the measured Kerr rotation and the calculated spin accumulation, I determine the conversion ratio between the Kerr rotation and the spin accumulation to be: −4 × 10−9 (real part), −2.5 × 10−8 (real part), and −3 × 10−9 (imaginary part) rad m A−1 for Cu, Au, and Pt, respectively, at a wavelength of 784 nm.
- Subjects
KERR magneto-optical effect; MAGNETOMETERS; SPINTRONICS
- Publication
Applied Sciences (2076-3417), 2018, Vol 8, Issue 8, p1378
- ISSN
2076-3417
- Publication type
Article
- DOI
10.3390/app8081378