Distinct crustal remanent magnetic anomalies are a strong indicator of rocks with stable natural magnetization (NRM) carriers. The latter able to store information on the history rock over long geological periods, and can therefore be used for variety applications in field paleomagnetism magnetism. Typically, paleomagnetic rock-magnetic studies rely bulk properties. With advent high-resolution ...

The magnetization of hollow superconducting filaments in a perpendicular applied field is calculated numerically using a mathematical model. With this model the hysteresis losses over a closed cycle of the applied field, as well as the instantaneous power dissipation in the filament, can be calculated. Theoretical results are compared with data from experiments using wire with hollow Nb3Sn fila...

We report on the design, construction, and magnetic field measurements of a system of high field sextupole magnets made from NdFeB compounds. The magnets are utilized as a focusing system for neutral hydrogen ~or deuterium! atoms in a polarized atomic beam source based on Stern–Gerlach spin separation. Each magnet consists of 24 segments of permanently magnetized material differing in remanence...

We significantly reduce the critical current Ic0 for the onset of spin torque switching of the free layer in nanometer-scale in-plane magnetized spin valves by partially canceling its demagnetization field (Hd) through the utilization of Co/Ni multilayer free layers. A zero-thermal-fluctuation critical current density Jc0 ~ 2 × 106 A/cm2 is determined through both current ramp rate and nanoseco...

Rights: © 2005 American Physical Society (APS). This is the accepted version of the following article: Alava, Mikko J. & Basso, Vittorio & Colaiori, Francesca & Dante, Lorenzo & Durin, Gianfranco & Magni, Alessandro & Zapperi, Stefano. 2005. Ground-state optimization and hysteretic demagnetization: The random-field Ising model. Physical Review B. Volume 71, Issue 6. 064423/1-12. ISSN 1550-235X ...

[1] Paleomagnetic directions were obtained from stepwise alternating-field or thermal demagnetization of 53 lava flows from southern Patagonia (latitudes 49.5 –52.1 S) that include the Pali-Aike volcanic field and the Meseta Viscachas plateau lavas. In addition to previous Miocene-late Quaternary ages of these flows, Ar/Ar dates spanning from 0.1 to 15.4 Ma were obtained for 17 of the sites. Al...