Journal of Applied Physics
Articles in this Issue
High strain-rate behavior of copper–titanium alloy
Plate-impact experiments were conducted on Cu–Ti alloy (with 4.8 wt. % Ti) samples to determine its dynamic strength properties, e.g., yield strength and spall strength, under high strain rate-loading...
White-noise quality evaluation in chaotic oscillation of Josephson junction for random-number generation
Recently, a high-quality random-number generator has been highly expected. In obtaining high-quality random-numbers, the use of random physical phenomena is necessary. Among random-number generation m...
Cosmic-ray muon scattering method to evaluate nuclear materials in fuel debris
Fuel debris was sampled by a trial retrieval method at Unit 2 of Fukushima Daiichi Nuclear Power Plant. To support safe handling and storage, it is important to distinguish fuel debris from other radi...
Optimization of the room-temperature electrocaloric properties of poly(vinylidene fluoride-trifluoroethylene) copolymers (55/45 mol. %) by means of electron irradiation
Electrocaloric materials are currently under investigation because of their potential use in active cooling systems. As electrocaloric transducer materials, electroactive polymers such as PVDF copolym...
Minimum energy principle of coupled metamaterials
The minimum energy principle is the most fundamental principle in physical systems, which is that the evolution of physical systems always tends toward the minimum energy states. Coupled mode theory i...
A comprehensive framework toward the seamless integration of muon reconstruction algorithms with machine learning
Muon-scattering tomography (MST) utilizes naturally occurring cosmic-ray muons to reveal the three-dimensional composition of concealed volumes, such as cargo containers in the maritime domain, reduci...
Spin-wave microscale RF delay lines for mid- and high-frequency 5G band
Delay lines (DL) are crucial components in communication systems, providing the required time delays for signal timing, synchronization, and processing. DLs providing nanosecond-scale delays are conve...
High-performance green micro-LED array with isolated n-GaN layers for 6.58 Gbps high-speed visible light communication
GaN-based micro-light-emitting diodes (micro-LEDs) have great advantages in visible light communication (VLC). However, the limited external quantum efficiency (EQE) and the modulation bandwidth of gr...
Magnetization-controlled terahertz harmonic generation with grating and cavity structures
Spintronic terahertz (THz) frequency conversion in ferromagnet/heavy metal (FM/HM) heterostructures has the potential to enhance high-speed data communication and advance ultrafast magnetic memory app...
Phononic frequency combs in twisted bilayer van der Waals material resonators
This study investigates the generation of phononic frequency combs (PnFCs) in twisted bilayer MoS2 nanomechanical resonators through a combination of molecular dynamics (MD) simulations and continuum-...
RF field-induced phase transition in vanadium dioxide: Switching dynamics, power thresholds, and reliability
Nonlinear behavior of phase-change materials such as vanadium dioxide (VO2) can be exploited to create novel electromagnetic devices such as low-loss radio frequency (RF) switches. The interaction of...
Pillar embedding visualization for muon-scattering tomography
Muon-scattering tomography (MST) utilizes the deflection of cosmic-ray muons to non-invasively reconstruct the three-dimensional internal structure and material composition of concealed objects, such...
A theoretical investigation of a magnetically shielded Hall thruster with conducting walls
A 5 kW-class, magnetically shielded Hall effect thruster made of conducting walls is analyzed with a 2D particle/fluid model, in an attempt to understand the trends observed in recent prototypes. Two...
Achieving enhanced electrical properties and temperature stability in 0.6BiFeO3–0.4BaTiO3 lead-free piezoelectric textured ceramics
As a promising lead-free and high-temperature piezoelectric material system, BiFeO3–BaTiO3 has drawn increasing research interest. The 0.6BiFeO3–0.4BaTiO3 textured ceramics have been synthesized using...
High-performance van der Waals MTJs with graphene barrier and Fe3GaTe2 electrodes
Van der Waals (vdW) magnetic tunnel junctions (MTJs) have emerged as promising candidates for next-generation spintronic devices, offering superior interface quality and interlayer coupling that enabl...
An analytical physics-based model for low-field mobility in nitride high-electron-mobility transistor considering the momentum relaxation and two-dimensional electronic gas effective mass
Accurate modeling of two-dimensional electron gas (2DEG) parameters in AlGaN/GaN high-field electron mobility transistors is essential to gain a deep physical understanding of electron transport. To d...
Role of neutron Bragg-edge spectroscopy in development of practical magnetic materials
Neutron diffractometry plays a pivotal role in fundamental magnetism research, especially in determining magnetic structures. However, its application in practical magnetics was historically sparse du...
Engineering MoS2–MoTe2 heterojunctions: Enhancing piezoresponse and rectification
Piezoelectric materials play a vital role in energy harvesting, piezotronics, and various self-powered sensing applications. The piezoelectric strength of 2D materials is limited by the carrier charge...
Machine learning approach in predicting nanofluid viscosity of alumina, copper oxide, silicon dioxide, and titanium dioxide using physics constraint-based XGBoost model
Nanofluids are essential colloidal suspensions composed of base fluids with suspended nanoparticles. They possess enhanced thermophysical properties, making them useful for various applications, inclu...
Symmetry-tailored dielectric environments for metal nanoplasmonics
The manipulation of nanoplasmonic optical fields depends critically on both the intrinsic plasmonic resonance of metal nanoparticles and the properties of their surrounding dielectric environment. Key...
Magnetism-modulated tunable bandgap for active metamaterial beams integrated with magnetorheological elastomers
The integration of smart materials with external stimuli to tune bandgap properties has garnered significant attention in recent years. Magnetorheological elastomers (MREs) are particularly promising...
Queen Medb’s cairn: A feasibility study in muography
We present a cosmic muon imaging study of Queen Medb’s cairn in Knocknarea, Ireland, using GEANT4 and CRY simulation tools. A hidden chamber is suspected within the cairn, based on similar historical...
Thermal performance enhancement of complementary field-effect transistors via comparative analysis of power delivery structures
Self-heating effects are a growing reliability challenge in vertically stacked Complementary Field-Effect Transistors (C-FETs) due to structural thermal isolation introduced by vertical integration—un...
Thermal transport in heavy-ion irradiated GaN: The effect of static and dynamic annealing
The suppression of thermal transport in semiconducting materials due to ion irradiation has recently garnered wide attention. In particular, heavy gold ions (Au2+) have been shown to induce ultralow t...
Lattice-induced spin dynamics in Dirac magnet CoTiO3
Spin–lattice coupling is crucial for understanding the spin transport and dynamics for spintronics and magnonics applications. Recently, cobalt titanate (CoTiO3), an easy-plane antiferromagnet, has be...