Journal Article

We report a laboratory search for ultralight dark photon dark matter using a single-site, two-sensor array of commercial scalar optically pumped magnetometers. In the low-frequency regime where the Earth–ionosphere system acts as an electromagnetic transducer, the expected magnetic signal is a narrow-band triplet of frequencies. [...]

We report a detailed structure and spin dynamics in two different insulating polycrystalline spinels of varying Ge and Fe contents in cubic MnCo2O4 (MCO). The stoichiometry of the investigated system being (Ge0.1Mn0.9)(Fe0.2Co1.8)O4 [G1F2] and (Ge0.2Mn0.8)(Fe0.4Co1.6)O4 [G2F4]. [...]

We present a new isotope-based sample-source setup to enable bulk defect studies on single samples using positrons. For this technique, we employ the positron emitter 22Na (activity of 7 MBq) and modified our Coincidence Doppler Broadening Spectrometer (CDBs). [...]

Neutron diffraction experiments of TmFeO$_3$ single crystals were performed in the external magnetic fields. The field along the $c$ axis increases temperature of spin-reorientation transition $T_{SR}$ from phase $\Gamma_4$ to $\Gamma_2$. [...]

We report the magnetoelastic properties of a Ba$_{2}$CuGe$_{2}$O$_{7}$ single crystal at low temperatures under a magnetic field applied along the crystallographic [001] axis. Our results extend to low temperatures, the 𝐻−𝑇 phase diagram determined for this compound by neutron scattering. [...]

Commonly employed pH-sensing dyes include coumarins, rhodamines, fluoresceins, and cyanines, each offering distinct spectral properties and tunability. The design of fluorescent acid-base sensors typically involves organic dye molecules with functional groups that can interact with OH− ions. [...]

Conjugated polymers (CPs) offer many attractive features for photodiodes and photovoltaics, including solution processability, ease of scale-up, light weight, low cost, and mechanical flexibility. CPs have a wide range of energy gaps; thus, the choice of the specific polymer determines the optimum operational wavelength range. [...]

Lithium-ion batteries powering electric vehicles can contain up to ∼100 liters of electrolyte solution. This solution typically consists of LiPF6 salt dissolved in a mixture of organic carbonates such as ethylene carbonate and diethyl carbonate. [...]