2017

Aug

Poster presentation at the 28th Magnetic Recording Conference (TMRC) in Tsukuba, Japan

The conference will focus on future magnetic storage technologies for hard disk drives and solid-state memories and will be held in Tsukuba, Japan. The conference attendees will also have a chance to visit two of the Japan's magnetic and spinotronic research centers. read more.....

2017

Apr

Oral presentation at the 2017 IEEE International Magnetics Conference (INTERMAG) in Dublin, Ireland

INTERMAG is one of the major conferences in the field of applied magnetism and information storage technologies. There, I will present our findings of the dual free layer (DFL) sensor's higher-frequency modes, which we characterized with the help of the spectrum analyzer and then identified using micromagnetic simulations. read more.....

2017

Apr

Oral presentation at the 2017 Integrated Nonlinear Microwave and Millimetre-wave Circuits Workshop (INMMiC) in Graz, Austria

The upcoming workshop on Integrated Nonlinear Microwave and Millimetre-wave Circuits (INMMiC) will be held at the Graz University of Technology (German: Technische Universität Graz or TU Graz). INMMiC is a forum intended for promoting, discussing, and spreading ideas in the field of nonlinear microwave and millimetre-wave circuits and systems. read more.....

2016

Nov

Oral presentation at the 2016 Annual Conference on Magnetism and Magnetic Materials (MMM) in New Orleans, Louisiana

The Magnetism and Magnetic Materials (MMM) Conference brings together members of the international scientific and engineering communities interested in recent developments in all aspects of fundamental and applied magnetism. In my oral presentation, I will elaborate on nonlinear effects in MgO-based magnetic tunnel junctions (MTJs). read more.....

2015

Dec

Poster presentation at the 13th Joint Magnetism and Magnetic Materials (MMM)-INTERMAG Conference in San Diego, California

The 13th Joint MMM-INTERMAG Conference will be held in San Diego, California. This is one of the largest and most important conferences in the area of applied magnetism. Our abstract has been accepted for a poster presentation and will be featured in IEEE Transactions on Magnetics. read more.....

2014

Dec

2014 FEKO Student Competition

FEKO Student Competition judges have awarded me an Honorable Mention Prize for my interesting application of FEKO! Read more on the FEKO website. read more.....

2013

Oct

New publication in the Journal of Applied Physics

Fast and efficient calculations of optical responses using electromagnetic models require computational acceleration and compression techniques. A hierarchical matrix approach is adopted for this purpose. In order to model large-scale molecular structures, these methods should be applied over wide frequency spectra. Here, we introduce a novel parametric hierarchical matrix method that allows for a rapid construction of a wideband system representation and enables an efficient wideband solution. read more.....

Poster presentation at the 28th Magnetic Recording Conference (TMRC) in Tsukuba, Japan

Abstract: We propose a new measurement technique to characterize ferromagnetic resonance (FMR) modes in magnetic tunnel junctions (MTJs). Due to selectivity and low-noise characteristics of the utilized radio-frequency (RF) receiver, which is often used in spectrum analyzers, we achieve large dynamic range FMR measurements. Instead of relying on weak coupling between the AC excitation and the magnetization fluctuations, we measure the noise floor difference between the two states: at zero and non-zero DC bias. The difference is due to the ferromagnetic layers’ magnetization fluctuations adding to the noise floor of the AC excitation signal. This readout mechanism differentiates the proposed method from the previously reported measurement systems. Moreover, by separately adding a controllable RF source, we detect both linear and nonlinear FMR modes.

Proposed Measurement System
Fig. 1. Proposed spectrum analyzer FMR measurement system.

Phase Noise Level Difference
Fig. 2. Change in the noise floor with the bias voltage around the central frequency of the free layer (FL) mode.

Full conference paper can be downloaded here [E. Auerbach et al. 2017]