Effects of Laser Spot Size on the Microstructure and Magnetic Properties of PLD Fabricated Fe-Co Films
- Resource Type
- Periodical
- Authors
- Yamashita, A.; Kaku, H.; Yanai, T.; Nakano, M.; Fukunaga, H.
- Source
- IEEE Transactions on Magnetics IEEE Trans. Magn. Magnetics, IEEE Transactions on. 59(11):1-3 Nov, 2023
- Subject
- Fields, Waves and Electromagnetics
Films
Laser beams
Magnetic multilayers
Surface morphology
Soft magnetic materials
Saturation magnetization
Magnetic films
Defocus rate (DF rate)
droplet
Fe-Co
laser energy density
pulsed laser deposition (PLD)
- Language
- ISSN
- 0018-9464
1941-0069
Fe-Co films are prepared by using a pulsed laser deposition (PLD) method with several diameters of a laser beam. It was found that the usage of an Fe-Co alloy target together with a small spot size, which means that a laser beam was focused on the surface of a target, enables us to reduce the number and/or size of droplets and improve the surface roughness of samples. The transfer of composition from a target to the corresponding film deteriorated as the diameters of a laser beam decreased. Furthermore, an as-deposited Fe-Co film prepared by using the small spot size had a magnetization of approximately 2.4 T at the applied magnetic field of 1400 kA/m.