Materials Literature
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The metal-semiconductor hetero-structures have recently emerged as functional materials for their potential applications in the areas of photonic, optoelectronic, and other fields. Here, we discuss the structural characterization of Au/CdSe tetrapod hetero-structures by using high-resolution transmission electron micr…
We contrastively investigate the micro-structure and composition evolution of Ti0.53Sb2Te2.6 (TST) alloy in phase change memory cells respectively undergoing three repeated and 105 endurance operations. For the cell experiencing three repeated operations, the active phase change region is not formed while many small c…
This paper gives the optimum SET pulse with the investigation on SET current delay and the multi-level-cell (MLC) operation for super-lattice phase change memories (SL-PCMs). From the investigation, the voltage, or the electric field triggers RESET/SET transition of SL-PCM. The induced energy is also essential for cha…
We present an unusual optical switching effect in relaxor ferroelectrics Pb(Mg1/3Nb2/3)O3-Pb(Zr0.53,Ti0.47)O3 transparent ceramics under strong AC electric fields, which is accompanied by a peculiar dielectric response rarely reported previously and attributed to the disruption of the ferroelectric domain structure by…
We have studied the impact of structural disorder on the magnetic ordering and magnetocaloric response of amorphous Gd68Ni32 and Gd53Al24Co20Zr3 microwires. We find that the presence of structural disorder significantly broadens the paramagnetic to ferromagnetic (PM-FM) transition and the temperature-dependent magneti…
The induction of different crystal morphologies is of crucial importance for many applications. In this work, the preparation of various crystal morphologies within clotrimazole films on glass substrates is demonstrated. Amorphous clotrimazole thin films were transformed via vapor annealing into crystalline structures…
This paper investigates the mechanical properties of hydrogenated silicon carbide nanotubes ( H - SiCNTs ) using a molecular mechanics model in conjunction with the density functional theory (DFT). Analytical expressions presented in this study can be employed for nanotubes with different chiralities. Four different p…
Visible light excitation of silver nanoparticles in the presence of polymerizable monomers and selected dyes triggers the self-assembly of nanolasers in a synthetically simple process. The new nanolasers incorporate a thin, fully organic gain medium that allows the tuning of the core absorption to a selected dye, or o…
Pyroelectric property of orthorhomic GdMnO3 polycrystalline samples was investigated. Two pyrocurrent peaks were observed with the sharp one near 20 K and the broad one at around 120 K. The dependences of these two peaks on magnetic field, heating rate, and poling voltage were explored systematically. The sharp peak i…
In this study, the magnetic coercivity (Hc) of Fe/ZnO heterostructure monotonically decreased as voltage was applied. The reversibility of this effect was demonstrated by cyclically changing the bias voltage from 0 to 6–9 V; the Hc decreased 15%–20%. The Hc value exhibited the same variation whether the applied voltag…
Epitaxial CaMnO3 thin films on (001) LaAlO3, (LaAlO3)0.3(Sr2AlTaO6)0.7, and SrTiO3 were synthesized in a range of strain states from coherently strained on LaAlO3 (1.6% strain) to fully relaxed on SrTiO3. We observed a magnetic ordering transition in CaMnO3 thin films suppressed from the Néel temperature of bulk CaMnO…
We have carried out combined density functional theory (DFT) and kinetic Monte Carlo (KMC) simulations for ammonia oxidation on RuO 2 (110) using a database of 24 reaction processes (36 processes if reverse processes are counted separately) and compared the selectivity for reaction products under ultrahigh vacuum (UHV…
Abstract Tree growth stress (GS) consists of an elastic component and a viscoelastic locked-in component. The elastic component is released instantaneously by cutting wood, whereas the locked-in component remains. The latter can be released by hot water treatment, which is known as hygrothermal recovery (HTR). In this…
We have synthesized a series of YMn1−xCrxO3 (0 ≤ x ≤ 0.1) samples and study the effect of Cr-doping on their magnetic properties. The magnetic characterization indicates that with increasing Cr-content up to 0.1, the antiferromagnetic (AFM) transition temperature increases from 73 to 89 K. Our experiment results also…
We demonstrate the impact on thermal conductivity of varying the concentration of oxygen vacancies and reduced cations in Pr0.1Ce0.9O2−δ thin films prepared by pulsed laser deposition. The oxygen vacancy concentration is controlled by varying the oxygen partial pressure between 1 × 10−4 and 1 atm at 650 °C. Correspond…
Intriguing patterns of periodic, concentric, layered, mineral microstructure are present in nature and organisms, yet they have elusive geneses. We hypothesize temperature oscillation can be an independent factor that causes the self-assembly of such patterns in mineral phases synthesized in solution. Static experimen…
Ferroelectric/ferromagnetic (soft and hard) three-phase microwave absorption composites, consisting of Fe-Si-Al/BaTiO3/Nd2Fe14B, are presented, which were fabricated by mechanical ball milling. The microstructure, magnetic, and microwave properties were measured, demonstrating significant improvement in magnetization…
The dielectric properties of BaZr0.25Ti0.75O3/BaMg6Ti6O19 composites were investigated. A concise equation to predict the dielectric constant of the BaZr0.25Ti0.75O3/BaMg6Ti6O19 composites was derived. The validity and applicability of the equation were also validated via some experiments data, including ferroelectric…
BACKGROUND: Glioma is the most common and most difficult to treat brain cancer. Despite many efforts treatment, efficacy remains low. As neurosurgical removal is the standard procedure for glioma, a method, allowing for both early detection and exact determination of the location, size and extent of the tumor, could i…
We present the results based on dielectric, electro-optical and photoluminescence (PL) measurements of a ferroelectric liquid crystal (FLC) doped with differently functionalised (–COOH, –OH and –NH2 groups) multi-walled carbon nanotubes (MWCNTs). Functional group induced significant modifications in the dielectric per…