27 research outputs found
Properties of Binary Transition-Metal Arsenides (TAs)
We present thermodynamic and transport properties of transition-metal (T)
arsenides, TAs with T = Sc to Ni (3d), Zr, Nb, Ru (4d), Hf and Ta (5d).
Characterization of these binaries is made with powder X-ray diffraction,
temperature and field-dependent magnetization and resistivity,
temperature-dependent heat capacity, Seebeck coefficient, and thermal
conductivity. All binaries show metallic behavior except TaAs and RuAs. TaAs,
NbAs, ScAs and ZrAs are diamagnetic, while CoAs, VAs, TiAs, NiAs and RuAs show
approximately Pauli paramagnetic behavior. FeAs and CrAs undergo
antiferromagnetic order below TN = 71 K and TN \approx 260 K, respectively.
MnAs is a ferromagnet below TC = 317 K and undergoes
hexagonal-orthorhombic-hexagonal transitions at TS = 317 K and 384 K,
respectively. For TAs, Seebeck coefficients vary between + 40 uV/K and - 40
uV/K in the 2 K to 300 K range, whereas thermal conductivity values stay below
18 W/(m K). The Sommerfeld-coefficient {\gamma} are less than 10 mJ/(K2mol). At
room temperature with application of 8 Tesla magnetic field, large positive
magnetoresistance is found for TaAs (~25%), MnAs (~90%) and for NbAs (~75%).Comment: 7 figures; Will be published in the upcoming focus issue in
Superconductor Science and Technolog
The effect of the size of sea trout (Salmo trutta L.) females from Rega River upon the size of eggs
The aim of work was to assess statistically the effect of body length, weight and age of sea trout (Salmo trutta L.) females from Rega River upon average diameter and weight of swollen eggs, and weight of mature eggs
Feeding of sea trout (Salmo trutta L.) migrating upstream for spawning in lower Oder River system
The paper presents an analysis of the food tracts of sea trout (Salmo trutta L.) migrating from the Baltic Sea for spawning to the Gulf of Szczecin and lower Oder River, i.e. to waters of the lower Oder system