Pulsed Field Science Highlights

27 October 2016

New technique for identifying Weyl materials

The work gives physicists a new tool for exploring and understanding a class of materials that could lead to faster electronics.

27 June 2016

Upper critical field of iron-based superconductor discovered

Scientists discovered how strong of a magnetic field was necessary to suppress superconductivity in a thin film of iron-selenium.

16 February 2016

New properties revealed in atomically-thin semiconductors

Scientists begin to fill in the blanks on transition metal dichalcogenides.

14 October 2015

Colossal magnetoelectric coupling probed to 90 teslas

Ni3TeO6 provides a new approach to coupling magnetism to ferroelectricity with a record large response. We measured this material's magnetic and electric properties across an extended range of temperature and magnetic field and compared with theoretical calculations to extract a model that describes the underlying reason for a large magnetoelectric coupling. High magnetic fields were key to establishing the magnetic Hamiltonian. This work is motivating the discovery of further 3d-4d oxide materials with large magnetoelectric couplings.

16 June 2015

Quasiparticle mass enhancement approaching optimal doping in a high-Tc superconductor

Using magnetic fields of over 90 T, the effective mass in the high-Tc superconductor YBa2Cu3O6+x was shown to be strongly enhanced as the material is doped toward optimal Tc.

16 February 2015

Atomic pantograph tunes magnetic ground state in a solid

A novel approach combining pulsed field optical FBG strain measurements in world-class magnets, with Density Functional based calculations to pinpoint the peculiar nanopantograph mechanism behind the magnetoelastic coupling, allows researchers to conclude that magnetic field and pressure are alternative ways to tune the quantum properties of the Shastry-Sutherland compound SrCu2(BO3)2

20 October 2014

Transport in the quantum critical regime of the iron arsenide superconductor BaFe2(As1-x Px)2

High magnetic fields reveal the electronic interactions underlying high-temperature superconductivity in the iron pnictides. This research unifies the superconducting phase diagram of the pnictides with those of other quantum critical, high-temperature superconductors, such at the cuprates.

16 July 2014

Normal State Electronic Structure in Underdoped High-Tc Cuprates

Comprehensive angle-resolved quantum oscillation measurements on YBa2Cu3O6+x in magnetic fields approaching 100 tesla are used to address longstanding problem of the normal state electronic of underdoped high temperature superconducting cuprates. The symmetry of the Fermi surface points uniquely to its reconstruction by biaxial ordering of the charge and bond degrees of freedom.

10 February 2014

Interplay between Frustration and Spin-Orbit Coupling in Vanadates

The high-magnetic field phase diagram to 65 Tesla of the MV2O4 family (M = Cd, Mg) reveals new multiferroic phase transitions that point to an unusual interplay between spin-orbit interactions and frustrated magnetism.

23 October 2013

Bounding the Pseudogap in Cuprate High-TC Superconductors

Scientists of the NHMFL-PFF have employed Resonant Ultrasound Spectroscopy to reveal a thermodynamic signature of the “Pseudo-Gap” within and beyond the superconducting phase boundary of YBCO. This experiment provides thermodynamic evidence that the pseudo gap is connected to the superconducting ground state in the cuprate materials.

5 June 2013

Magnetic Field-Induced Delocalized to Localized Transformation in GaAs:N

Using optical spectroscopy and the MagLab’s unique 60 tesla long-pulse magnet in Los Alamos, scientists have shown how nitrogen dopant atoms in gallium arsenide (GaAs) can form extended “supercluster” states or can break up into localized nitrogen clusters. Nitrogen-doped GaAs (GaAs1-xNx) is a semiconductor alloy with potential applications for a wide range of energy-related applications such as photovoltaics.

15 February 2013

Magnetic Structure and Magneto–electric Coupling in Multiferroics

Multiferroics — “Spintronics without heat” — coupled ferromagnetism and ferroelectricity can provide a new class of functional materials for needed applications including magnetic sensing, data storage and manipulation, high–frequency and high–power electronics, and energy savings.

15 June 2012

Magnetostriction and Magnetic Texture to 100.75 Tesla in Frustrated SrCu2(BO3)2

Magnetic systems provide controllable “model” systems to study interacting many body quantum effects, relevant to poorly understood problems beyond the realm of magnetism. For example, disorder leads to Bose glass behavior, enabling study of the Bose-glass to BEC transition in quantum magnets — a key component to understanding the superconductor-to-insulator quantum phase transition. High magnetic fields drive Bose glasses into Bose-Einstein condensates.