News

January 14, 2021

Congratulations to Onri! He is recently featured on the UMN News: Hardwired for science.

January 7, 2021

Congratulations to Dr. Diqing Su! She has successfully defended her PhD thesis titled "Magnetic Biosensing Technologies and Applications" on Jan 7th, 2021.

Diqing Su phd defenseDiqing Su phd defense-1

December 5, 2020

Our group member Onri Jay Benally is recently featured on the CSE website: Hardwired for science - CSE researcher finds fit in spintronics lab.

Onri featured CSE

November 30, 2020

In a joint undertaking, Dr. Delin Zhang and co-authors from the Department of Electrical and Computer Engineering, the Department of Mechanical Engineering, and the School of Physics and Astronomy have reported direct observation of magnon-phonon coupling in time and frequency domains under femtosecond laser excitation. Based on their observations, the team have also proposed a theoretical model explaining the physical mechanism underlying this strain-spin interaction, and the results of their work are reported in “High-frequency magnetoacoustic resonance through strain-spin coupling in perpendicular magnetic multilayers,” published in Science Advances. The work is significant for the impact it could have on applications in cloud storage, advanced spin memory, logic, and other spintronic devices.

Science Advances

The observation the coupling of magnons and phonons in both time and frequency domains upon femtosecond laser Excitation: This strain-spin coupling leads to a magnetoacoustic resonance in perpendicular magnetic [Co/Pd]n multilayers, reaching frequencies in the extremely high frequency (EHF) band, e.g., 60 GHz.  Meanwhile, if the strain with an amplitude of 0.5% is applied in the perpendicular magnetic [Co/Pd]n multilayers, the system shows a large-angle magnetization precession and Its magnetization switching occurs in 3 ns.

October 23, 2020

Distinguished McKnight University Professor Jian-Ping Wang has been elected fellow of the American Physical Society (APS). The APS citation reads: “For outstanding contributions to the synthesis and fundamental understanding of magnetic and spintronic materials, and to the fabrication of devices for applications in computing.”

News source: UMN ECE

September 22, 2020

Dr. Kai Wu and coauthors have recenlty pubsliehd a review paper on ACS Appl. Nano Mater. titled "Magnetic-Nanosensor-Based Virus and Pathogen Detection Strategies before and during COVID-19". They reviewed the popular magnetic nanosensing techniques including magnetoresistance, magnetic particle spectroscopy, and nuclear magnetic resonance. Magnetic point-of-care diagnostic kits are also reviewed aiming at developing plug-and-play diagnostics to manage the SARS-CoV-2 outbreak as well as preventing future epidemics. In addition, other platforms that use magnetic nanomaterials as auxiliary tools for enhanced pathogen and virus detection are also covered. The goal of this review is to inform the researchers of diagnostic and surveillance platforms for SARS-CoV-2 and their performances.

TOC

This review article is open access.

June 17, 2020

Congratulations to Dr. Jinming Liu. He has successfully defended his PhD thesis titled "Synthesis of Magnetic Materials for Rare-Earth-Free Permanent Magnets Applications"!

Dr. Liu first experimentally reported body-centered tetragonal (bct) Fe nanoparticles. He first reported α”-Fe16N2 foils synthesized by a low-temperature nitriding process. He has authored and co-authored over 20 journal papers including Acta Materialia, Physical Review Materials, Small, and ACS Applied Materials & Interface, etc.

Jinming defense

June 3, 2020

Congratulations to Renata and coauthors, their joint work "Tunable magnetic skyrmions in spintronic nanostructures for cellular-level magnetic neurostimulation" is highlighted on the cover of Journal of Physics D: Applied Physics.

Cover-JPD

March 22, 2020

Congratulations to Dr. Kai Wu and the co-authors. Their join work "Magnetic Particle Spectroscopy for Detection of Influenza A Virus Subtype H1N1" is publisehd in ACS Appl. Mater. Interfaces.

In this work, they introduced a new biosensing scheme based on magnetic particle spectroscopy (MPS) and the self-assembly of MNPs to quantitatively detect H1N1 nucleoprotein molecules. The H1N1 nucleoprotein molecule hosts multiple different epitopes that forms binding sites for many IgG polyclonal antibodies. Anchoring IgG polyclonal antibodies onto MNPs triggers the cross-linking between MNPs and H1N1 nucleoprotein molecules, thereby forming MNP self-assemblies. Using MPS and the self-assembly of MNPs, we were able to detect as low as 44 nM (4.4 pmole) H1N1 nucleoprotein.

March 3, 2020

Congratluations to Jinming and coauthors, their review paper titled "High-moment magnetic nanoparticles" is publisehd on the Journal of Nanoparticle Research.

High-moment magnetic nanoparticles (MNPs) such as FeCo are attracting intense interest for biomedical applications. In this review, the applications of these high-moment MNPs such as magnetic hyperthermia, drug delivery, magnetic resonance imaging (MRI), and biosensing are summarized. We believe that the high-moment MNPs are promising candidates for many bio-applications.

Pages