Novel Materials Become Multifunctional at the Ultimate Quantum LimitNovember 9, 2012 Research at beamline 4-ID-C has shown that by using complex oxides with correlated electrons confined to quantum well geometry, a new dimension can be added to the mix, moving us closer to everyday electronics that become smaller and faster than they are today.Contacts: Jaq Chakhalian - Univ. of Arkansas; John Freeland APS/ANL 
Pressure-Tuning the Quantum Phase Transition in a Model 2-D MagnetApril 11, 2012 Researchers using high-resolution x-ray scattering on beamlines 4-ID-D and 6-ID-B have demonstrated how pressure can be used to dial-in different magnetic states in a two-dimensional magnetic material, SrCu2(BO3)2.Contacts: Sara Haravifard & Tom Rosenbaum -Univ. of Chicago 
An Electronic Dance of Spins and OrbitsDecember 9, 2010 Materials with significant spin-orbit interactions are currently an area of intense research. A study carried out on beamline 4-ID-D indicates how an Iridium-containing oxide material displays such coupling, making it a potential candidate for novel spintronic applications.Local Contact: Daniel Haskel 
Probing Spin Liquids with a New Pulsed-Magnet SystemAugust 26, 2010 Pulsed magnetic fields have recently been used on beamline 4-ID-D to study magnetoelastic effects in the rare-earth pyrochlore terbium titanate spin-liquid compound. A change is structural symmetry is observed for fields above 25 Tesla.Local Contacts: Zahir Islam and Jacob Ruff 
A Colossal Magnetic Effect under PressureJune 12, 2009 Researchers using beamline 4-ID-D are are using high-pressure XMCD to delve into the forces behind colossal magnetoresistance, which is up to a thousand times more powerful than GMR and could trigger another revolution in computing technology.Local Contacts: Daniel Haskel & Yang Ding 
A New Spin on Inducing Chirality in Pre-biological MoleculesOctober 23, 2008 Researchers using beamline 4-ID-C have demonstrated that a previously unconsidered mechanism can play a role in chiral-selective chemistry: namely low-energy spin-polarized secondary electrons, produced by irradiation of a magnetic substrate.Local Contact: Richard Rosenberg 
Different Roads Toward Quantum CriticalityOctober 17, 2007 The study of magnetic phase diagrams is essential to understanding the organizing principles of correlated electrons, as well as understanding the way in which physical parameters determine material properties.Local Contact: Yejun Feng 
Logic Tells Us that Appearances May Be DeceptiveSeptember 24, 2007 Nanostructured magnetic rings have been under intese study for potential computer-memory applications. The cover story of the 24 September 2007 issue of Applied Physics Letters describes research performed on beamline 4-ID-C that provides new insights into how multilayer ring structures could be used in such device applications.Local Contacts: John Freeland & Volker Rose 
Giant Magnetocaloric Materials Could Have Large Impact on the EnvironmentJune 15, 2007 Climate change caused by polutants is a concern in need of solutions, research at beamline 4-ID-D may help reduce the levels of environmentally damaging hydrofluorocarbons in our atmosphere.Local Contact: Daniel Haskel 
At the Boundary between Superconducting and Magnetic OxidesApril 12, 2006 The transistor, which shaped so much of our modern technology, grew out of scientists’ desire to gain a greater understanding of the interfaces between different materials. In the same way, today’s materials scientists seek to expand our understanding of complex oxides by creating new states at the interface of two materials.Local Contact: John Freeland 
Defect-Driven Magnetism in Mn-doped GaNDecember 12, 2005 Semiconductors doped with magnetic elements are candidates as room-temperature magnetic semiconductors with potential use as new low-power-consumption electronics, non-volatile memories, and field-configurable logic devices. Research at the beamline 4-ID-C Advanced Photon Source is producing new and important information about Mn-doped GaN.
Nanoskins on Layered ManganitesJuly 20, 2005 Researchers using beamline 4-ID-C have successfully demonstrated how an insulating nanoskin in contact with a completely ferromagnetic metallic layer can be naturally created. In their Nature Materials paper, these researchers note that situating a well-defined surface insulator atop a fully spin-polarized bulk demonstrates that two of the most demanding components of an ideal magnetic tunnel junction can self-assemble naturally. |
Exposing Valence-Bond Model InadequaciesAugust 2, 2012 The bond-valence model has for years been used to relate the number of nearest atomic neighbors and the interatomic distances to the valence state of an atom. Researchers using beamlines 4-ID-D and 3-ID-D have recently demonstrated that obtianing valence information in this way does not necessarily yield the correct state.Contacts: Narcizo Souza-Neto - LNLS; Daniel Haskel - APS 
Unlikely route to ferroelectricityMay 16, 2012 A new type of ferroelectric, LuO2Fe4, has been investigated at the APS by a research team from Julich research center. XAS & XMCD studies on beamline 4-ID-C determined the Fe magnetism and valence, while single crystal x-ray scattering measurements at 6-ID-B & 6-ID-D probed the associated structural and charge ordering.Contact: Manuel Angst - Forschungszentrum Julich 
Novel Magnetic Material Under Extreme StressSeptember 15, 2011 Ferromagnetic materials are key ingredients in many technologies, but exposing them to compressive stress usually destroys their magnetism, limiting their applications. Recent research on beamline 4-ID-D has found a material, La2NiMnO6, which bucks this trend and exhibits robust ferromagnetism.Local Contact: Daniel Haskel 
Stretching a boring material can lead to new functionalitySeptember 30, 2010 The oxide compound europium titanate is pretty boring on its own. Research on beamlines 4-ID-C and 6-ID, however, show that this compound takes on remarkable new properties when its confined to nanometer films and properly stretched through growth on an appropriate substrate material.Local Contacts: John Freeland and Phil Ryan 
Searching for Next-Generation Electronic MaterialsDecember 14, 2009 A new class of layered oxide materials discovered thanks to research at the beamline 6-ID-B offers scientists unprecedented opportunities for creating the next generation of electronic devices.Local Contact: Phil Ryan 
Revealing Quantum Criticality in an Elemental AntiferromagnetMay 21, 2009 High pressure scattering measurements on beamline 4-ID-D are a milestone in the study of emergent magnetism and quantum criticality. These studies open new possibilities for probing fundamental magnetism and technologically important correlated electron materials.Local Contact: Yejun Feng 
Increasing Magnetic Response of Ferromagnetic Semiconductors under High PressureFebruary 16, 2009 Scientists using beamline 4-ID-D have manipulated electron mobility and pinpointed the mechanism controlling the strength of magnetic interactions in europium oxide and, hence, the material's magnetic ordering temperature.Local Contact: Daniel Haskel 
Oldest Known Magnets Secrets Revealed Under High PressuresFebruary 1, 2008 Researchers using beamlines 4-ID-D and 16-ID at the Argonne Advanced Photon Source have uncovered new information about the coupling between magnetic and electrical properties of this venerable and highly useful material magnetite.Local Contacts: Daniel Haskel & Yang Ding 
Orbital Reconstruction at a Complex Oxide InterfaceOctober 15, 2007 A current problem of intense interest to the condensed matter physics community is the behavior of systems with strongly interacting electrons. Researchers using beamline 4-ID-C have gained important new insights into this phenomenon.Local Contact: John Freeland 
Getting to the Core of Luminesent NanowiresJune 18, 2007 Researchers using beamline 4-IDC have determined what is responsible for the luminescence exhibited by one-dimensional nanostructures that have great potential for optoelectronic devices such as blue-light lasers for next-generation optical storage media.Local Contact: Richard Rosenberg 
Tailoring the Properties of Magnetic NanostructuresMay 23, 2007 Studies carried out at beamline 4-ID-C show that subtle variations in shape can tailor the properties of magnetic nanostructures that could be used for new high-speed electronic devices.Local Contact: David Keavney 
What's in the Cage Matters in Iron Antimonide Thermoelectric MaterialsMarch 29, 2007 Iron antimonide materials have drawn intense interest because they offer a pollution-free source of electricity and a vibration free source of refrigeration. Research at beamline 4-ID-D examined how the magnetism of cage-filler lanthanides may influence the thermoelectric properties of these materials.Local Contact: Daniel Haskel 
Into the Vortex: Dynamics in Nanoscale MaterialsFebruary 20, 2006 Nanosized magnets are of great interest for their potential applications in new electronic devices. Researchers using beamline 4-ID-C have made some surprising discoveries about the behavior of these materials that may lead to a greater understanding of materials on the nanoscale.Local Contact: David Keavney |
