Nanostructures of Magnetic Dirac Metals for RF Electronics
Abstract
The key achievements of this project are: (i) Building an ambient temperature ferromagnetic resonance FMR and inverse spin Hall effect ISHE spectrometer in the first year of the project for measurements over a frequency band of 1 to 31 GHz; (ii) Design and fabrication of a FMR spectrometer that also allows measurements of inverse spin Hall voltage over the frequency, temperature, and magnetic field ranges of 1 to 15 GHz, 2 to 300 K and 0 to +/- 5 tesla respectively. This machine is based on a unique cryostat design that allow condensation of tilde 40 liters of liquid helium from the welding-grade He gas; (iii) Growth of Fe78Ga13B9, Fe60Co20B20, Fe75Co25 andNi81Fe19 thin films with dc magnetron sputtering and their characterization using vibrating sample magnetometry (VSM) and FMR; (iv) Growth of Bi85Sb15 and Bi2Te3films by sputter deposition from melt-grown targets, and measurement of Raman scattering, X-ray crystallography and low temperature electronic transport of these films;(v) Growth of FeGaB/Ag/BiSb, Bi2Te3/FeCo FeCoB/Bi2Te3, and b-W/FeCo heterostructures of varying thickness and interface character; (vi) Measurements of static and dynamic magnetization with VSM and FMR of the bilayers listed in the preceding sentences, together with the measurements of spin pumping across interfaces manifested in the FMR line-width and inverse spin Hall voltage; (vii) Measurements of spin textures, structural and magnetic periodicity and topological Hall effect in [beta-W/FeCoGd /Ho]10 multilayers; (viii) Epitaxial growth of chiral antiferromagnet Mn3Sn and establishing the signatures of various magnetic phases in anisotropic magneto transport in such films.
Document Details
- Document Type
- Technical Report
- Publication Date
- May 17, 2024
- Accession Number
- AD1229729
Entities
People
- R. C. Budhani
Organizations
- Morgan State University