A5082419494- Magnetic properties of thin films
- Quantum, superfluid, helium dynamics
- Physics of Superconductivity and Magnetism
- Magnetic and transport properties of perovskites and related materials
- Advanced Condensed Matter Physics
- Nuclear Physics and Applications
- Atomic and Subatomic Physics Research
- Theoretical and Computational Physics
- Multiferroics and related materials
- High-pressure geophysics and materials
- Magnetic Properties and Applications
- Advanced Chemical Physics Studies
- Magnetic Properties of Alloys
- Psychiatric care and mental health services
- Electronic and Structural Properties of Oxides
- Graphene research and applications
- Dementia and Cognitive Impairment Research
- Topological Materials and Phenomena
- Health and Medical Studies
- Cold Atom Physics and Bose-Einstein Condensates
- Superconducting Materials and Applications
- Suicide and Self-Harm Studies
- Alzheimer's disease research and treatments
- ZnO doping and properties
- Graphite, nuclear technology, radiation studies
Oak Ridge National Laboratory
2016-2025
University of Notre Dame
2022-2023
Quantum Science Center
2014-2022
Purdue University West Lafayette
2022
Oak Ridge Associated Universities
2019-2021
University of Minnesota
2013-2018
Forschungszentrum Jülich
2002-2013
Institut Laue-Langevin
2001-2012
Office of Scientific and Technical Information
2012
National Technical Information Service
2012
Abstract Strong Coulomb repulsion and spin–orbit coupling are known to give rise exotic physical phenomena in transition metal oxides. Initial attempts investigate systems, where both of these fundamental interactions comparably strong, such as 3 d 5 complex oxide superlattices, have revealed properties that only slightly differ from the bulk ones constituent materials. Here we observe interfacial between antiferromagnetic insulator SrMnO paramagnetic SrIrO is enormously yielding an...
Magnetic transition metal chalcogenides form an emerging platform for exploring spin-orbit driven Berry phase phenomena owing to the nontrivial interplay between topology and magnetism. Here we show that anomalous Hall effect in pristine Cr2Te3 thin films manifests a unique temperature-dependent sign reversal at nonzero magnetization, resulting from momentum-space curvature as established by first-principles simulations. The change is strain tunable, enabled sharp well-defined substrate/film...
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTAdsorption by MFI-type zeolites examined isothermal microcalorimetry and neutron diffraction. 1. Argon, krypton, methaneP. L. Llewellyn, J. P. Coulomb, Y. Grillet, Patarin, H. Lauter, Reichert, RouquerolCite this: Langmuir 1993, 9, 7, 1846–1851Publication Date (Print):July 1, 1993Publication History Published online1 May 2002Published inissue 1 July...
The phases of D 2 monolayers on graphite between the commensurate and incommensurate phase have been investigated by neutron diffraction, revealing new features including domain-wall constructions. For related systems, 3 He 4 adsorbed graphite, structure solid first second layers interaction them analyzed.
Thin-film oxide heterostructures show great potential for use in spintronic memories, where electronic charge and spin are coupled to transport information. Here we a La0.7Sr0.3MnO3 (LSMO)/PbZr0.2Ti0.8O3 (PZT) model system explore how local variations magnetic phases mediate this coupling. We present direct, measurements of valence, ferroelectric polarization magnetization, from which map the at LSMO/PZT interface. combine these experimental results with structure calculations elucidate...
Chiral symmetry breaking of phonons plays an essential role in emergent quantum phenomena owing to its strong coupling spin degree freedom. However, direct experimental evidence the chiral phonon-spin is lacking. In this study, we report a phonon-mediated interlayer exchange interaction atomically controlled ferromagnetic metal (SrRuO3)-nonmagnetic insulator (SrTiO3) heterostructures. Owing unconventional interaction, have observed rotation spins as function nonmagnetic insulating spacer...
The field of spintronics has seen a surge interest in altermagnetism due to novel predictions and many possible applications. MnTe is leading altermagnetic candidate that significant across its layered antiferromagnetic structure, high Neel temperature (TN ~ 310 K) semiconducting properties. We present results on molecular beam epitaxy (MBE) grown MnTe/InP(111) films. Here, it found the electronic magnetic properties are driven by natural stoichiometry MnTe. Electronic transport situ...
Neutron-diffraction measurements have been performed to investigate in detail the commensurate-incommensurate (C-IC) phase transition of deuterium monolayers physisorbed on basal planes graphite. Several novel features observed. Above completion commensurate (\ensuremath{\surd}3 \ifmmode\times\else\texttimes\fi{} \ensuremath{\surd}3 )R30\ifmmode^\circ\else\textdegree\fi{} a continuous striped superheavy domain-wall (\ensuremath{\alpha} phase) occurs at temperatures below 7.3 K and densities...
We have demonstrated a general framework for realizing and modulating perpendicular magnetic anisotropy in rare-earth-element heavy-metal-free material system. Using GaAs(001)/Fe(001) template, we developed synthesis scheme to produce epitaxial body center tetragonal Fe-N with (001) texture. By varying the N doping concentration, crystal tetragonality ($c$/$a$) can be tuned relatively wide range. It is found that layer strong crystalline (MCA) as it approaches iron nitride interstitial...
Magnetoelectric oxide heterostructures are proposed active layers for spintronic memory and logic devices, where information is conveyed through spin transport in the solid state. Incomplete theories of coupling between local strain, charge, magnetic order have limited their deployment into new communication technologies. In this study, we report direct, measurements strain- charge-mediated magnetization changes La0.7Sr0.3MnO3/PbZr0.2Ti0.8O3 system using spatially resolved characterization...
Direct evidence of the nonuniformly canted state spin-flop phase induced by a magnetic field applied to Fe/Cr(100) superlattices is obtained polarized neutron reflectometry. It unambiguously demonstrated that magnetization alternating Fe layers twisted through multilayer stack proving stable noncollinear configuration. The maximal tilt at end progressively reduces towards center multilayer. set angles deduced from model-free data evaluation employing supermatrix routine. Spin-flip...
The magnetic properties of epitaxial bcc Co films thickness 10–100 Å have been investigated using the surface magneto-optic Kerr effect (SMOKE), polarized neutron reflection (PNR), and nuclear resonance (NMR). in-plane coercivity is found to vary strongly with a large magnetocrystalline anisotropy develops at 60 which maintained in thicker films. PNR measurements on Au-coated 100-Å film 300 K are consistent layer averaged moment per atom 1.4 μB magnetization profile within 50 GaAs interface....
The structure of C${\mathrm{D}}_{4}$ films adsorbed on a highly homogeneous MgO(100) surface has been probed by neutron diffraction. Both the monolayer and bilayer crystallize in commensurate square $c(2\ifmmode\times\else\texttimes\fi{}2)$ superstructure. This is first clear evidence two-dimensional condensation solid van der Waals film with symmetry. An order-disorder transition observed appears to be first-order melting.
The investigation of enzyme and neurotransmitter levels and/or their metabolites in the CSF patients with senile dementia Alzheimer's type (SDAT) could become a promising approach for clinical research diagnostic procedure. To learn more about metabolic reflections central metabolism SDAT, we measured gamma-aminobutyric acid (GABA) homovanillic (HVA), dopamine metabolite. In 16 female SDAT eight matched control patients, GABA were by ion exchange fluorimetric detection, HVA fluorimetrically....
The perpendicular magnetic anisotropy (PMA) in CoFeB sandwiched by MgO and tantalum layers was investigated using anomalous Hall effect polarized neutron reflectometry. It found that a large PMA the above layer related to its low magnetization compared case of under layer. Using sensitivity neutrons absorption cross-section boron, we unambiguously determined depth profile boron distribution showed after annealing, most diffused form 2-nm-thick interface between layers.
We report a direct observation of giant saturation magnetization in Fe16N2. By exploiting thin film epitaxy, which provides controlled biaxial stress to create lattice distortion, we demonstrate that magnetism can be established Fe16N2 coherently grown on MgO (001) substrate. Explored by polarized neutron reflectometry, the depth-dependent magnetic induction (Bs) epitaxial films is visualized, reveals strong correlation with in-plane parameter and tensile strain developed at near substrate...
Abstract The realization of a controllable metamagnetic transition from AFM to FM ordering would open the door plethora new spintronics based devices that, rather than reorienting spins in ferromagnet, harness direct control materials intrinsic magnetic ordering. In this study FeRh films with drastically reduced temperatures and large magneto-thermal hysteresis were produced for magnetocaloric applications. Remarkably, giant magnetization changes (measured be as high has ~25%) are realized...
The electronic reconstruction occurring at oxide interfaces may be the source of interesting device concepts for future electronics. Among devices, multiferroic tunnel junctions are being actively investigated as they offer possibility to modulate junction current by independently controlling switching magnetization electrodes and ferroelectric polarization barrier. In this Letter, we show that spin a...