in this work, mn ferrite nanopowders were prepared by co-precipitation method and were characterized. phase identification of the nanopowders was performed by x-ray diffraction method and the mean particle size of the nanopowders was calculated by scherrer's formula, using necessary corrections. magnetic parameters of the prepared nanopowders were measured by a vibrating sample magnetomete...

Thermally-assisted ultra-fast magnetization reversal in a DC magnetic field for magnetic multilayer thin films with perpendicular anisotropy has been investigated in the time domain using femtosecond laser heating. The experiment is set-up as an optically pumped stroboscopic Time Resolved Magneto-Optical Kerr Effect magnetometer. It is observed that a modest laser fluence of about 0.3 mJ/cm ind...

We report the first measurements of negative ion motion in the superfluid phases of 3He and in the normal phase below 17 inK. Refrigeration was achieved with nuclear demagnetization of copper and we used a pulsed NMR platinum powder thermometer immersed in the liquid. In the A phase the longitudinal resonance frequency provided an additional high-resolution thermometer. In the normal phase we o...

The energetics of thin elongated ferromagnetic nano-islands is considered for some different shapes, aspect ratios and applied magnetic field directions. These nano-island particles are important for artificial spin ice materials. For low temperature, the magnetic internal energy of an individual particle is evaluated numerically as a function of the direction of a particle's net magnetization....

SUMMARY Changes in the geomagnetic field over geologic timescales can be used to study evolution and processes of its sources Earth's deep interior. As a stark contrast behaviour recent past, late Neoproterozoic is defined by ambiguous polar wander paths, ultralow strengths period extreme reversal hyperactivity. Palaeointensity data from this time are still scarce conclusions made these suffer ...

Retrieving well-dated terrestrial archives of Holocene climate change is fundamentally important for building robust models and predictions. In this study we obtained records paleomagnetic direction relative paleointensity the Earth's magnetic field from an alluvial soil situated on a flood river terrace close to stratigraphically confined Chalcolithic mound near village Koprivetz in NE Bulgari...

In this paper, we simulate magnetic hyperthermia process on a mathematical phantom model representing cancer tumor and its surrounding healthy tissues. The temperature distribution throughout the phantom model is obtained by solving the bio-heat equations and the consequent cell death amount is calculated using correlations between the tissue local temperature and the cell death rate. To have a...

We use single-cycle THz fields and the femtosecond magneto-optical Kerr effect to, respectively, excite and probe the magnetization dynamics in two thin-film ferromagnets with different lattice structures: crystalline Fe and amorphous CoFeB. We observe Landau-Lifshitz-torque magnetization dynamics of comparable magnitude in both systems, but only the amorphous sample shows ultrafast demagnetiza...

Ultrafast demagnetization has been studied in Si/Pts160 Åd / fCo25Ni75sxd /Pts8 Ådg20 sx=3, 4.5, and 6 Åd multilayers with perpendicular anisotropy by magneto-optical pump-probe measurements in the polar geometry. Time-resolved measurements made in the saturated state showed that maximum demagnetization was achieved within 300 fs. Hysteresis loops were measured at a time delay of 1.3 ps for tem...