-
Supplementary Data for "An unsupervised machine learning based approach to identify efficient spin-orbit torque materials"
18 Feb 2024 | | Contributor(s):: Shehrin Sayed, Hannah Kleidermacher, Giulianna Hashemi-Asasi, Cheng-Hsiang Hsu, Sayeef Salahuddin
Introduction:There has been a growing interest in materials with large spin-orbit torques (SOT) for many novel applications, and in our article [1], which is currently under review, we have shown that a machine-learning-based approach using a word embedding model can predict...
-
OOMMF on nanoHUB - A Quick Demonstration
22 Nov 2021 | | Contributor(s):: Michael Joseph Donahue
A quick demonstration of OOMMF, Object Oriented MicroMagnetic Framework, on nanoHUB.
-
Micromagnetics and OOMMF Tutorial Series
20 Aug 2020 | | Contributor(s):: Michael Joseph Donahue
Background readingThe following papers provide nice introductions to micromagnetics theory and practice:Micromagnetism by Lukas Exl, Dieter Suess and Thomas Schrefl.General Micromagnetic Theory and Applications, Helmut Kronmüller in Materials Science and Technology, 2019 Wiley-VCH Verlag...
-
Magnetic Tunnel Junction (MTJ) as Stochastic Neurons and Synapses: Stochastic Binary Neural Networks, Bayesian Inferencing, Optimization Problems
26 Oct 2018 | | Contributor(s):: Abhronil Sengupta, Kaushik Roy
In this presentation, we provide a multi-disciplinary perspective across the stack of devices, circuits, and algorithms to illustrate how the stochastic switching dynamics of spintronic devices in the presence of thermal noise can provide a direct mapping to the units of such computing...
-
Materials Characterization at High Magnetic Felds and Extreme Temperatures: Focus on Magnetism
09 Oct 2018 | | Contributor(s):: Neil R Dilley
Recent additions to the recharge center at the Birck Nanotechnology Center in Purdue’s Discovery Park include an MPMS‐3 SQUID magnetometer and a DynaCool Physical Properties Measurement System from Quantum Design.
-
Magnetic Microsystems: Tiny Magnets Solving Big Problems
23 Oct 2017 | | Contributor(s):: Donald P. Arnold
In this talk will highlight my group's development of microfabricated permanent magnets and their application in various functional microsystems. To set the stage, I'll first describe some basic concepts about magnets and physical scaling laws that motivate our efforts. ...
-
Magnetic Nanowires: Revolutionizing Hard Drives, Random Access Memory, & Cancer Treatment
18 Feb 2016 | | Contributor(s):: Beth Stadler
This talk will reveal synthesis secrets for nm-control of layer thicknesses, even for difficult alloys, which has enabled studies of magnetization reversal, magneto-elasticity, giant magnetoresistance, and spin transfer torqueswitching. These nanowires will mitigate the ITRS Roadmap’s...
-
Modular Approach to Spintronics
28 Apr 2015 | | Contributor(s):: Kerem Yunus Camsari
There has been enormous progress in the last two decades, effectively combining spintronics and magnetics into a powerful force that is shaping the field of memory devices. New materials and phenomena continue to be discovered at an impressive rate, providing an ever-increasing set of building...
-
Reversible and reproducible giant universal electroresistance effect
20 Nov 2013 | | Contributor(s):: syed rizwan hussain naqvi
After the prediction of the giant electroresistance effect, much work has been carried out to find this effect in practical devices. We demonstrate a novel way to obtain a large electroresistance (ER) effect in the multilayer system at room temperature. The current-in-plane (CIP) electric...
-
Exchange-bias like hysteretic magnetoelectric-coupling of as-grown synthetic antiferromagnetic structures
20 Nov 2013 | | Contributor(s):: syed rizwan hussain naqvi
The magnetoelectric (ME) coupling of CoFeB/Ru/CoFeB synthetic antiferromagnetic (SAF) structure is studied at room-temperature when the SAF structure was deposited on the (011)-Pb(Mg1/3Nb2/3)O3-PbTiO3 piezoelectric substrate. It was found that the magnetoelectric coupling showed butterfly like...
-
[Illinois] BioNanotechnology Seminar Series Spring 2012: Dynamics of Multimodal Magnetomotive Microspheres
15 Jun 2013 | | Contributor(s):: Adeel Ahmad
Iron oxide magnetic nanoparticles (MNP's), due to their small size, unique magnetic properties and the ability to manipulate these remotely, are promising materials for diagnostic, imaging, and therapeutics in biomedical applications. In this presentation, we describe the fabrication,...
-
All-Spin Logic Devices
19 Jul 2012 | | Contributor(s):: Behtash Behinaein
We propose a spintronic device that uses spin at every stage of its operation: input and output information are represented by the magnetization of nanomagnets which communicate through spin-coherent channels. Based on simulations with an experimentally benchmarked model we argue that the device...
-
Evolution of microstructure and magnetic properties in magnetron-sputtered CoCr thin films
02 Feb 2012 | | Contributor(s):: Brian Demczyk
In this work, transmission electron microscopy, including the Lorentz mode is combined with magnetic measurements (vibrating sample magnetometry and ferromagnetic resonance)to draw correlations between the structural and magnetic constituents in cobalt-chromium films of increasing thickness.
-
Performance of Magnetic Quantum Cellular Automata and Limitations due to Thermal Noise
02 Jun 2011 | | Contributor(s):: Ajey Jacob, Dmitri Nikonov
Operation parameters of magnetic quantum cellular automata are evaluated for the purposes ofreliable logic operation. The dynamics if nanomagnets is simulated via Landau-Lifshitz-Gilbert equations with stochastic magnetic field corresponding to thermal fluctuations. It is found that in the...
-
Comparisons of macrospin and OOMMF simulations
26 Jan 2010 | | Contributor(s):: Dmitri Nikonov, George Bourianoff
Plots of switchign time of nanomagnets by spin torque calculated by macrospin model and micromagnetic tool OOMMF, compared side-by-side. D. E. Nikonov, G. I. Bourianoff, G. Rowlands, I. N. Krivorotov Should be read and cited in conjunction with http://arxiv.org/abs/1001.4578
-
Clustermag
07 Jun 2008 | | Contributor(s):: Eldad Tamman
Simulate clusters configurations of nanomagnets