AC Magnetoelectrical Susceptibility Study of Multiferroics

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Three-dimensional (3D) rhombic zero-depth pores present a promising solution to the challenges associated with the requirement for ultrathin membranes in DNA sequencing. This study provides a comprehensive numerical analysis of 3D rhombic zero-depth pores formed at the intersection of triangular microchannels using finite element modeling. The model was validated with a mean absolute error of 2.75% between numerical and experimental results. We identified a critical channel length, beyond which pore conduct

The anatase and rutile phases of titanium dioxide (TiO2) have been widely studied for their photocatalytic and electronic properties, while the brookite phase is rarely explored. The investigations of intrinsic magnetotransport in mixed-phase systems are limited. Magnetic susceptibility and magnetotransport measurements were performed between 2 K and 300 K in magnetic fields up to 12 T. Both samples with different anatase–rutile–brookite ratios exhibit Curie–Weiss susceptibility. Transport measurements reve

Strong magnetic fields applied to metals confine electrons into Landau orbits, except at the boundaries at which frequent surface collisions disrupt their cyclotron motion. In two-dimensional systems, these boundary states form dissipationless chiral edge channels in the quantum Hall regime. By contrast, the quantum limit of three-dimensional (3D) metals is traditionally thought to differ fundamentally and instead contains gapless Landau bands, lacking quantized Hall conductance or dissipationless transport

Collisional dissipation is expected to be the primary damping mechanism for helicon waves in low-temperature, high-density, moderate magnetic field plasmas. Combining a normal-mode analysis with high-resolution magnetic field measurements, we validate this expectation across a broad parameter space. However, we identify a distinct regime where the measured helicon damping rate is reduced by nearly a factor of 2 compared with collisional predictions. In this regime, a second harmonic at 2ω is observed, contr

Isogeometric analysis was proposed to bridge the gap between computer-aided design and numerical discretization. However, standard multi-patch isogeometric analysis mandates conformal discretizations across patch interfaces, posing challenges for multi-material domain problems. In the context of electric machines, this requirement becomes evident in a large number of patches needed to represent machines consisting of several domains and materials. In this work, we adopt, extend, and evaluate three non-confo

Negative triangularity (NT) magnetic configurations have recently gained attention as a promising route to achieve H-mode-like confinement without edge-localized modes and without a power threshold for access. While both core and edge confinement properties of NT have been extensively documented, consistently lower divertor target cooling and increased difficulty in achieving a detached regime have been observed. This work presents a comparative SOLPS-ITER modeling study of two Ohmic L-mode discharges in th

Coherent spin resonance methods such as nuclear magnetic resonance (NMR) and electron spin resonance (ESR) spectroscopy have led to spectrally highly sensitive, non-invasive quantum imaging techniques with groundbreaking applications in fields such as medicine, biology, and physics. Meanwhile, transmission electron microscopy (TEM) offers detailed investigations with sub-atomic resolution, but often inflicts significant radiation damage. Here we exploit synergies and report on an integration of ESR spectros

The utilization of subwavelength resonators, such as small electric dipoles, plasmonic resonators, or objects made of materials with a high dielectric constant, has enabled the manipulation of electromagnetic fields down to the subwavelength regime with synthetic electromagnetic materials built from dense arrangements of such resonant inclusions [1]. Guiding [2] and focusing [3] of electromagnetic energy at the deep subwavelength scale has been demonstrated for electromagnetic waves in metamaterials, by exp

TbPc2 single-molecule magnets adsorbed on a magnesium oxide tunnel barrier exhibit record magnetic remanence, record hysteresis opening, perfect out-of-plane alignment of the magnetic easy axes, and self-assembly into a well-ordered layer.

We investigate the effect of H adsorption on the magnetic properties of individual Co atoms on Pt(111) with scanning tunneling microscopy. For pristine Co atoms, we detect no inelastic features in the tunnel spectra. Conversely, CoH and CoH2 show a number of low-energy vibrational features in their differential conductance identified by isotope substitution. Only the fcc-adsorbed species present conductance steps of magnetic origin, with a field splitting identifying their effective spin as S-eff = 2 for Co

After completing the qualification tests of the ITER cable-in-conduit conductors (CICC), the tests of samples from the series manufacture are running in the SULTAN test facility in Villigen, Switzerland. The key test for the conductor samples is the current sharing temperature, Tcs, at the nominal operating field and current, i.e. the maximum temperature at which the conductors operate before developing an electric field of 10 μV/m. All the TF samples fulfilled the ITER requirement of Tcs ≥ 5.8 K after 1000

Gas-solid catalytic reaction systems depend on a combination of several dynamic eects, such as mass transfer, chemisorption and surface reactions taking place simultaneously. In this master thesis, the extension of the method of extent-based model identication is proposed for catalytic reaction systems which involves the transformation of the number of moles in the gas and solid phases into decoupled state variables called (vessel) extents. This transformation computes extents of inlet, outlet, mass transfe

The mechanical action on iron of the first horseshoe electro-magnets (1824) was obvious. They quickly found important applications (telegraphy). Their use to investigate more subtle magnetic, magneto-optical, atomic or nuclear properties of matter began in 1845 with Faraday. Until the 1970s, when superconducting magnets became common, iron-cored electromagnets were normally used to produce steady magnetic fields of high intensity. We will follow the history of a series of fundamental physics discoveries, of

The induction motor offers the best value for money and is therefore used in many different application fields where power requirements are higher than a few kilowatts. ln order to be able to reduce the priee and the motor's size, a control algorithm based on an estimation of the flux without speed sensor for a Brushless AC motor (BLAC) has been developed in the Professer Shen's lab. The objective of this project is to examine the possibility to adapt and then implement this sensorless control algorithm to

This article introduces the design of surface coils for multinuclear applications. The relative sensitivities of several NMR-visible nuclei of biological interest are considered, and the motivations to operate an RF coil at multiple frequencies, both sequentially and simultaneously, are reviewed. The design of nested surface coils is then developed. Magnetic fields generated by planar loop and butterfly coils are first introduced. The benefits of quadrature design are briefly considered, and methods for com

The present work describes non-linear simulations leading to a description of diamagnetic thresholds for sawtooth cycles in tokamaks. Provided that a criterion of diamagnetic stabilization for a m/n=1/1 tearing is fulfilled, it is shown that diamagnetic effects alone can drive true sawteeth with complete magnetic reconnection in high temperature Ohmic plasmas with S~10^7-10^9

Local-probe weak-transverse-field and zero-field mu SR measurements have been employed to investigate magnetic ordering in the new magnetoelectric compound FeTe2O5Br. Below the Neel transition temperature T-N=10.6 K a static local magnetic field starts to develop at the mu(+) sites. Fast mu(+) polarization decay below T-N speaks in favor of a broad distribution of internal magnetic fields, in agreement with the incommensurate magnetic structure suggested by neutron diffraction experiments. Above T-N the pre

Synchronous motors require sensors in order to control these devices in speed and/or position. Basically, the auto-commutation needs 3 sensors for a 3-phase type actuator. In micro-motors, as there is no more room to place the sensors, self-sensing approach must be used. The motor becomes a sensor it-self and electromagnetic phenomena are analyzed to detect the position of the rotor. These phenomena are magnetic saturation, back-EMF detection, Eddy current analysis and/or magnetic anisotropy variation. The

Patterned magnetic thin films are of interest due to the potential for new technological applications and also because of their modified physical behaviour as the lateral dimensions are reduced. The functionality of patterned films can be intelligently designed by combining materials with different magnetic properties. In particular, bilayers comprising a magnetically hard and a magnetically soft film (often referred to as exchange-spring systems) provide useful model systems for optimization of exchange-co

Stimuli-responsive polymers have the unique property of undergoing a reversible phase transition. This property has attracted much interest for their application in the field of medicine and biotechnology, such as drug delivery systems. Linear polymers of the poly(N-substituted acrylamides) family and their three-dimensional macroscopic (hydrogels) or microscopic (microgels) networks demonstrate such a phase transition behavior. In particular, polymers of this family have the ability to respond to external

AC Magnetoelectrical Susceptibility Study of Multiferroics

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Numerical characterization of electrochemical transport in three-dimensional rhombic zero-depth pores

Low-Temperature Magnetotransport of Mixed Polycrystalline Rutile, Anatase and Brookite Phases of TiO2

Transport evidence for chiral surface states from three-dimensional Landau bands

Impact of resonant second-harmonic generation on helicon-wave damping

Immersed boundary-conformal isogeometric methods for magnetostatics

Impact of Triangularity on Edge Transport and Divertor Detachment: a Solps-iter Study of Tcv L-mode Plasmas

Electron spin resonance spectroscopy in a transmission electron microscope

Non-Reciprocal and Topological Wave Phenomena at the Sub-Wavelength Scale

Giant Hysteresis of Single-Molecule Magnets Adsorbed on a Nonmagnetic Insulator

Controlling the Spin of Co Atoms on Pt(111) by Hydrogen Adsorption

Summary of the Test Results of ITER Conductors in SULTAN

Modelling of Surface Catalytic Reaction Systems using the Concept of Extents

Physics in magnetic fields from Michael Faraday to Pierre Weiss & his contemporaries

Flux Observer-Based vector control for Induction Motor

Nested Surface Coils for Multinuclear NMR

Cycling dynamics of the internal kink mode in non-linear two-fluid MHD simulations

Muon spin relaxation study of the layered magnetoelectric FeTe2O5Br with spin amplitude modulated magnetic structure

Self-sensing methods to drive micro-machines

Permalloy thin films exchange-coupled to arrays of stencilled cobalt islands

Synthesis and characterization of thermoresponsive polymers, hydrogels and microgels, based on poly(N-substituted acrylamides)