EMR Science Highlights

23 June 2021

Magnetoelastic Coupling in the Multiferroic BiFeO3

High-resolution electron magnetic resonance studies of the spin-wave spectrum in the high-field phase of the multiferroic Bismuth ferrite (BiFeO3) reveal direct evidence for the magnetoelastic coupling through a change in lattice symmetry from rhombohedral to monoclinic. This study provides important information for designing future spintronics devices based on BiFeO3.

11 February 2021

Strong Magnetic Coupling in Molecular Magnets through Direct Metal-Metal Bonds

An exciting advance of interest to future molecular-scale information storage. By using the uniquely high frequency Electron Magnetic Resonance techniques available at the MagLab, researchers have found single molecule magnets that feature direct metal orbital overlap (instead of weak superexchange interactions), resulting in behavior similar to metallic feromagnets that is far more suitable to future technologies than previous molecular magnets.

6 October 2020

Spin-Charge Interconversion at Near-Terahertz Frequencies

This work reports the first observation of the dynamical generation of a spin polarized current from an antiferromagnetic material into an adjacent non-magnetic material and its subsequent conversion into electrical signals

23 April 2020

Molecular magnetic building blocks

This study reports the first transition metal compounds featuring mixed fluoride–cyanide ligands. A significant enhancement of the magnetic anisotropy, as compared to the pure fluoride ligated compounds, is demonstrated by combined analysis of high-field electron paramagnetic resonance (HF-EPR) spectroscopy and magnetization measurements.

31 January 2020

Nuclear Spin Patterning Controls Electron Spin Coherence

Electron spin resonance work shows how transition metal can retain quantum information, important work on the path to next-generation quantum technologies.

12 December 2019

Liquid State Dynamic Nuclear Polarization at High Magnetic Field

This finding demonstrates a path forward to dramatically enhance sensitivity for molecule concentration measurement by magnetic resonance using Overhauser DNP.

20 June 2019

High field uncovers magnetic properties in chains of copper ions

The findings contribute to scientists' understanding of magnetic materials that could point the way to future applications.

29 January 2019

Scientists observe molecular movements in T cells

Insights into the structure and movement of T cell surface proteins could lead to new ways to fight cancers, infections and other diseases.

21 August 2018

Making a non-heme oxoiron(IV) complex a better oxidant

This work investigates a series of oxoiron complexes that serve as models towards understanding the mechanism of catalysis for certain iron-containing enzymes.

17 April 2018

Novel metallofullerene boosts dynamic nuclear polarization

In this study, researchers added a low concentration of the endohedral metallofullerene (EMF) Gd2@C79N to DNP samples, finding that 1H and 13C enhancements increased by 40% and 50%, respectively, at 5 teslas and 1.2 Kelvin.

26 February 2018

Across the Tree of Life: Radiation Resistance Gauged by High-Field EPR

This high-field EPR study of the H-Mn2+ content in the bacterium Deinococcus Radiodurans provides the strongest known biological indicator of cellular ionizing radiation resistance between and within the three domains of the tree of life, with potential applications including optimization of radiotherapy.

10 October 2017

Reversible magnetic switching in multifunctional material

With just a drop of water, a cobalt-based material changes both color and magnetic properties.

30 May 2017

Magneto-structural correlations in a transition metal complex

In the field of inorganic chemistry, magneto-structural correlations have been used to rationally design molecules with desirable properties, and to relate these properties to the electronic and geometric structures. In turn, such studies provide powerful tools for understanding important catalytic processes, as well as elucidating the structures of active sites in metalloproteins. This study reveals an unusually strong sensitivity of the magnetic properties of a CoS4 molecule to minute changes in its structure.

19 January 2017

Symmetry reduction in a quantum kagomé antiferromagnet

This area of research could help scientists understand high-temperature superconductivity and other mysteries.

25 May 2016

Potential qubits maintain quantum coherence outside a crystal

This approach to building “qubits” could be a promising tool for developing quantum computers.

29 January 2016

New record magnetic anisotropy in a molecular nanomagnet

Scientists created a molecular nanomagnet based on a single nickel atom with record-high magnetic anisotropy — a quality that makes it a promising building block for applications like memory storage.

14 October 2015

Tweaking molecular structure to tune chemical reactivity

A recent high-field EPR study by MagLab users from Wayne State and Grand Valley State Universities has demonstrated that minor changes in the periphery of a nickel-containing molecule can lead to a dramatic reorganization of its electron distribution. This in turn, induces a major shift in the reactivity of this compound.

12 May 2015

An approach for dynamic nuclear polarization of membrane proteins

Dynamic nuclear polarization (DNP) coupled with solid state NMR can provide orders of magnitude enhancement to normally weak NMR signals, thereby enabling the study of inherently dilute proteins such as membrane proteins. Here we demonstrate a new approach to obtain DNP signal enhancements of membrane proteins by utilizing spin labeled lipids as the polarization agents. This strategy results in more than 2x in signal enhancements of a membrane protein when compared to standard DNP sample preparation techniques.

10 April 2015

Controlled Under Pressure: Exchange Anisotropy in Organic Magnets

MagLab users have employed a combination of ab-initio theory and a newly developed high-pressure, high-field ferromagnetic resonance technique, which is uniquely sensitive to anisotropic magnetic interactions, to gain insights into the importance of spin-orbit coupling effects in a range of organic materials where this effect is usually considered to be small. The findings may be applicable to topics as diverse as spintronics and topological spin phases.

15 December 2014

Detailed Spectroscopic Study of a Square Planar High-Spin FeII Complex

Square-planar high-spin Fe(II) molecular compounds are rare. Using an easily modifiable pincer-type ligand, the successful synthesis of the first compound of this type that breaks the FeO4 motif was achieved, and the first spectroscopic evidence that the geometry and spin state persist in solution was obtained.