DC Field Science Highlights

28 May 2021

Exchange Bias Between Coexisting Antiferromagnetic and Spin-Glass Orders

A pane of window glass and a piece of quartz are both are transparent to light, but their atomic structure is very different. Quartz is crystalline at the atomic level while window glass is amorphous. This can also occur with magnetism at the atomic level in solids containing magnetic states such as antiferromagnetism (ordered) and spin-glass (disorded). This work describes the interaction (exchange bias) between ordered and disordered magnetic states and how the magnetic properties of the material are altered as a result.

26 March 2021

Broadening Participation in DC Field Facility by Bridging a Research Infrastructure Gap

Researchers based at four-year colleges and universities outside of the Research-1 (R1) tier face more obstacles to performing research than their colleagues from R1 universities or national laboratories with robust research infrastructures. Recognizing the need to bridge this infrastructure gap, the MagLab's DC Field Facility expanded access by adding two low-field magnet systems. These "on-ramp" systems facilitate critical access to materials research instrumentation by faculty and students from non-R1 institutions.

19 January 2021

Probing a Purported Spin Nematic State Utilizing the World Record 32T All-Superconducting Magnet

Nuclear magnetic resonance measurements were performed in the all-new 32 T superconducting magnet in an effort to confirm a new quantum state. Results confirm the game-changing nature of this magnet.

29 December 2020

Spectroscopic Decomposition Reveals Mangetization Mechanism in Multiferrroic Lutetium Iron Oxide Superlattices

Using electric fields as a switch to control the magnetism of a material is one of the goals behind the study of multiferroics. This work explores the microscopic origins of high temperature magnetism in one such material through the use of optical techniques in high magnetic fields, an approach that could help researchers understand magnetism in a large class of materials.

6 October 2020

Tunable Weyl Fermions in Chiral Tellurene in High Magnetic Fields

Topology, screws, spin and hedgehogs are words not normally found in the same scientific article but with the discovery of Weyl fermions in thin tellurine films they actually belong together. The work in this highlight describes how Qui et. al. used the unique properties of tellurine and high magnetic fields to identify the existence of Weyl fermions in a semiconductor. This discovery opens a new window into the intriguing world to topological materials.

1 September 2020

Hidden Magnetism Revealed in a Cuprate Superconductor

This research clarifies fundamental relationships between magnetism, superconductivity and the nature of the enigmatic “pseudogap state" in cuprate superconductors. The discovery provides an additional puzzle piece in the theoretical understanding of high-temperature superconductors - a key towards improving and utilizing these materials for technological applications.

28 July 2020

Inducing Magnetic Ring Currents in Non-Magnetic Aromatic Molecules

Magnetic induction is used in technology to convert an applied magnetic field into an electric current and vice versa. Nature also makes extensive use of this principle at the atomic and molecular level giving scientists a window to observe material properties. Using the 25 T Split-Helix magnet, researchers observed changes in the optical properties of organic materials due to currents induced by applied magnetic fields flowing in molecular rings, evidence that could increase the list of materials that could be used in future magnetic technologies.

1 June 2020

Magnetoelectric coupling at a transition between two spin states

Materials with magnetoelectric coupling - a combination of magnetic and electric properties - have potential applications in low-power magnetic sensing, new computational devices and high-frequency electronics. Here, researchers find a new class of magnetoelectric materials controlled by spin state switching.

23 March 2020

Exploring topological semimetals in high magnetic fields

Topological semimetals are an exciting new area of research due to their number of predicted and unexpected quantum mechanical states. Understanding these materials may also lead to quantum devices that function at near room temperature.

23 January 2020

Nematic Phase Weakens Superconductivity

A nematic phase is where the molecular/atomic dynamics show elements of both liquids and solids, like in liquid crystal displays on digital watches or calculators. Using high magnetic fields and high pressure, researchers probed the electronic states of an iron-based superconductor and found that its nematic state weakened superconductivity.

28 October 2019

Extreme re-entrant superconductivity

Studies of uranium ditelluride in high magnetic fields show superconductivity switching off at 35 T, but reoccurring at higher magnetic fields between 40 and 65 T.

28 October 2019

Emergent states of matter in chemically doped quantum magnets

Research on doped SrCu2(BO3)2 shows anomalies in the magnetization.

20 September 2019

Spin-lattice and electron–phonon coupling in 3d/5d hybrid Sr3NiIrO6

In Sr3NiIrO6 vibrations in the crystal lattice (phonons) play an important role in its intriguing magnetic properties that result in a very high coercive field of 55 T. Using a combination of pulsed and DC magnetic fields coupled with magnetization and far-infrared spectroscopy, researchers were able to conclusively link the phonons to the magnetic behavior.

20 June 2019

Fifty Percent Boost for Niobium–tin

MagLab users have modified the critical current of Nb3SN, a material that was thought to be fully exploited, and boosted its performance by 50%.

15 May 2019

Evidence Supporting BiPd as a Topological Superconductor

The observation of topological states coupled with superconductivity represents an opportunity for scientists to manipulate nontrivial superconducting states via the spin-orbit interaction. While superconductivity has been extensively studied since its discovery in 1910, the advent of topological materials gives scientists a new avenue to explore quantum matter. BiPd is being studied using "MagLab-sized fields" by scientists from LSU in an effort to determine if it is indeed a topological superconductor.

29 January 2019

Even denominator fractional quantum Hall states in graphene

Scientists revealed previously unobserved and unexpected FQH states in monolayer graphene that raise new questions regarding the interaction between electrons in these states.

5 November 2018

Quasi-2D to 3D Fermi surface topology change in Nd-doped CeCoIn5

Scientists found that the emergence of an exotic quantum mechanical phase in Ce1-xNdxCoIn5 is due to a shape change in the Fermi surface. This finding ran counter to theoretical arguments and has led investigators in new directions.

10 July 2018

Dirac fermions detected via quantum oscillations

This work provides important insight into one of the parent materials of iron-based superconductors.

19 March 2018

Switchable transmission of quantum Hall edge states in bilayer graphene

In the 14 years since its discovery, graphene has amazed scientists around the world with both the ground-breaking physics and technological potential it displays. Recently, scientists from Penn State University added to graphene's gallery of impressive scientific achievements and constructed a map that will aid future exploration of this material. This work is emblematic of the large number of university-based materials research efforts that use the MagLab to explore the frontiers of science.

31 January 2018

2D electron-hole "superconductor": Topological excitonic insulator

Decades ago a mechanism was proposed that described a quantum phase transition to an insulating ground state from a semi-metal (excitonic insulator, or EI) using very similar mechanics to those found in the BCS description of superconductivity. The discovery of this transition to an EI in InAs/GaSb quantum wells is striking not only for the long-sought experimental realization of important physics, but also the presence of recently proposed topological behavior.