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Magnetization Dynamics In Coupled Thin Film Systems, Daniel J. Adams
Magnetization Dynamics In Coupled Thin Film Systems, Daniel J. Adams
University of New Orleans Theses and Dissertations
A study is presented detailing experimental investigations of magnetization dynamics in nanostructured systems which are coupled magnetically. This work seeks to characterize the anisotropy of such systems through experimental techniques which probe microwave resonant absorption in the materials.
A custom-built experimental setup, designed and assembled in our labs, is explained in detail. This setup allows for angular-dependent ferromagnetic resonance (FMR) measurements in the sample plane through vector network analyzer spectroscopy and is adaptable to two different types of coplanar waveguides. This technique has proven effective for characterization of multiple types of magnetic systems, including multilayered structures as detailed here, with …
Ferromagnetic Resonance Studies Of Coupled Magnetic Systems, Daniel J. Adams
Ferromagnetic Resonance Studies Of Coupled Magnetic Systems, Daniel J. Adams
University of New Orleans Theses and Dissertations
The high-frequency properties of coupled magnetic systems have been investigated using vector network analyzer ferromagnetic resonance (VNA-FMR) spectroscopy. SAF structures consist of two ferromagnetic layers separated by a non-magnetic spacer, coupled through the indirect exchange interaction. The ferromagnetic layers of our samples were composed of FeCoB separated by a layer of Ru. The thickness of Ru was varied in the range of 8 to 18 Å among the samples studied. Antiferromagnetic coupling can be quickly identified by the major hysteresis loop (MHL).
A new way of displaying FMR data for these trilayer samples is presented which completely preserves the anisotropy …