Event date:
May 20 2021 1:00 pm

Ferromagnetic Resonance for Investigating Magnetization Dynamics in Magnetic Thin Films

Supervisor
Muhammad Sabieh Anwar
Student
Muhammad Basit
Venue
Zoom Meetings (Online)
Event
MS Thesis defense
Abstract
Ferromagnetic resonance describes the precessional motion of magnetization in the ferromagnetic material under the influence of external magnetic field. It further allows a three-dimensional analysis of magnetic thin films which depends on the geometry of the sample and the area of resonance. This study mainly focuses on the effectuation of a broadband ferromagnetic resonance station in contemplation of probing the magnetization dynamics of magnetic thin films in the microwave frequency range. In order to measure the static and dynamic properties of ferromagnetic thin films two measurement techniques have been developed: vector network analyzer ferromagnetic resonance (VNA-FMR) technique and Lock-in detection technique. Resonance is induced in the thin film with CPW, and the change in electromagnetic energy has been examined in the frequency and field domains. Both of these techniques uses a flip-chip setup in which, the sample is placed with face-down on the CPW. Frequency swept VNA-FMR technique unravels the static magnetic properties such as; saturation induction, anisotropy fields, effective magnetization and Landé g-factor. Whereas, the Lock-in detection technique measures the dynamic properties of magnetic thin films which are damping and loss mechanisms. Both of these setups are capable of conducting broadband frequency and field swept measurements in in-plane (IP) and out-of-plane (OOP) orientations. The present study will be helpful in enhancing the magnetic properties of ferromagnetic materials by doing the full angle dependent measurements in both IP and OOP orientations.

Join Zoom Meetinghttps://lums-edu-pk.zoom.us/j/99523973973?pwd=UnhFRmJEd1YwTzQxVXNxOWszUmJFUT09

Meeting ID: 995 2397 3973
Passcode: 680189